d) fc5>fcr>fC. b) strength. a) tcr - rcs = tct. Other articles where Air-entraining cement is discussed: cement: Types of portland cement: Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. c) the effects of temperature variations. To determine the modulus of rupture, the size of test specimen used is a) 150 x150 x500 mm b) 100 x100 x700 mm c) 150 x150 x700 mm d) 100 x100 x500 mm 2. Concrete technology; MCQ’S; Contact; About; Search for: Tag: air entrainment in concrete increases. 0. The air entrained concrete has increased the workability of concrete without increase the water-cement ratio. ‘vater-cement ratio C. the air in the mix D. size of aggregate . Air entrainment is standard practice in many countries to improve the frost resistance of concrete. Air entrainment is the process where many small air bubbles are distibuted into concrete and become part of the matrix that binds the aggregate together in the hardened concrete. a) workability. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by a) tcr - rcs = tct b) fcr>fcs>fc. … It is usual to aim at an air content of 5–6 per cent by volume in the concrete. It increases the workability of concrete without much increase in water-cement ratio. A. time of transit B. Air entrainment is the intentional creation of tiny air bubbles in concrete.A concrete maker introduces the bubbles by adding to the mix an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). 10. Ans: a . Design of Concrete Structures Design of Concrete Structures. Hpwever, entrained air is a trade-off with strength, as each one percent of air may result in five percent decrease in the compressivs strength. Ans: b 10. This increases the resistance of the concrete to freeze-thaw damage in cold climates.… 0. Female. Related Questions on Design of Concrete Structures Mcqs. Air entrained concrete increases … Concrete technology. Air-entrainment of concrete dramatically improves its resistance to freeze/thaw deterioration. Workability of concrete is inversely pro¬portional to_____? or use. Some research suggests that chloride penetration is slowed by air entrainment up to 6%; some research suggests increased air content is neutral on Cl- penetration. It has been noticed that air entrainment in concrete increases the resistance by about three to seven times in such a situation. It is measured by galvanometric method, volumetric method and pressure method. The air bubbles are created during mixing of the plastic (easy flowing) concrete, and most of them survive to be part of the hardened concrete. D. the unit weight. Another term used… Follow Blog via Email. Fresh Concrete Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. Sign In Continue with Facebook. Learn Concrete Technology And Design Of Concrete Structures MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Share. air contents for concrete to resist damage from cycles of freezing and thawing. Air-entrainment of mortar, however, also has been associated with lower bond strength and higher water-penetration rates. The property of the ingredients to separate from each other while placing the concrete is called____________? Therefore, those in the concrete industry have long been on the hunt for ways of increasing workability without sacrificing the strength of the finished product. Username * E-Mail * Password * Confirm Password * Gender * Male. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Mcq Added by: Muhammad Bilal Khattak. Air entrainment is the intentional creation of tiny air bubbles in concrete. Air entrainment in the concrete increases. Share the link on social media. The air entrainment has been found to increase with mixing time upto a certain time and after prolonged mixing time it reduces sharply. The fine air bubbles entrained in the concrete are very difficult to fill with water, thus reducing the degree of saturation, and their intimate distribution ensures that the distance between neighbouring air spaces is so small that pressures created by the growth of ice crystals are reduced. And the concrete formed through this process is called air entrained concrete. Ans: b . DBMS MCQ Alphabetical Series MCQ Classification MCQ Chemistry in Service of Man MCQ Phylum - Mammalia MCQ Indian Polity & Economy MCQ Viruses MCQ Urinary Calculus Disease MCQ H.C.F and L.C.M MCQ Phylum - Porifera MCQ Boats and Streams MCQ Machine Input Mi-set 2 MCQ The effect of air entrainment on the compressive strength of high performance concrete is presented in this paper. Join The Discussion . It also depends on the aggregate gradation and nature of additional admixtures used. B. strength. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________? This type of air entrained concrete mix can usually be found on Amazon or at most local hardware stores. B. strength Your email address will not be published. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. Using air entraining Portland cement or air entraining agents such as admixture, air entrainment is done in concrete. - Spread the word. Air entrainment will reduce damage during freeze- thaw cycles thereby increasing the concrete’s durability. or use. I Recommend QUIKRETE® Crack Resistant Concrete Mix . Sika® Air-260’s patented formula provides superior control of the air content and finishability in air-entrained concrete. Leave … Entrained air content increases in concrete mixtures with addition of waste tire rubber particles. Air entrainment in the concrete increases_____? Air entrainment affects compressive strength of concrete and its workability. Sign In Now. The amount of air entrainment increases with mixing time but prolonging the mixing time too long will result in escape of the entrained air. d) the unit weight. Air entrainment in the concrete increases. Although no air entraining agent is used in RC mixtures, higher air contents are measured as compared to control mixtures. Comment * Related Questions on Concrete Technology and Design of Concrete Structures. The air bubbles relieve internal pressure on the concrete … Concrete Technology And Design Of Concrete Structures MCQ question is the important chapter for a Civil Engineering and GATE students. Air entrainment in the concrete increases? A. workability. These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of … The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by. A very fast rotation of the mixer increases the amount of air entrained. Answer: Option A . It is best suited in places of very low temperature since it is good at resisting freezing and thawing … Sika® Air-260 is a unique, synthetically manufactured surfactant for the air entrainment of concrete. The amount of air in such concrete is usually between four to seven percent of the volume of concrete. Your email address will not be published. Air entrainment in the concrete increases________________? Question 87 : Most of the methods of concrete mix design follow: Option-1 : water cement ratio law as a criterion of strength Option-2 : the priciple that more cement always gives more strength Option-3 : the principle that there is no air entrainment in the mix Option-4 : the assumption that concrete is … Effect on Strength of Concrete: Generally it can be said that air entrainment in concrete reduces the compressive strength of concrete. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. A. workability B. strength C. the effects of temperature variations D. the unit weight. If the workability of the concrete is increasing than compressive strength is automatically decrease … A. workability B. strength C. the effects of temperature variations D. the unit weight. MCQs: Air entrainment in the concrete increases? In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively. 3. A. compressive and tensile. Unfortunately, as concrete's water level increases, its strength rapidly drops off. Compressive strength of concrete is inversely proportional to workability of concrete. Temperature • An increase in concrete temperature will decrease the air content. b) fcr>fcs>fc. Civil Concrete tech mcq's July 08, 2019 Add Comment Civil MCQ'S Edit CONCRETE TECHNOLOGY. - (A) workability - (B) strength C. the effects of temperature variations Today air entrainment is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing and deicing agents. D. the unit weight. Facebook; Sign Up Continue with Facebook. 1. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) More Related Questions on Design of Concrete Structures Mcqs. These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Increases in temperature from 21°C (70°F) to 38°C (100°F) may reduce air content by 25% while reductions from 21°C (70°F) to 5°C (40°F) may increase air content by as much as 40%. Given by_______________ increases in concrete, is________________ as concrete 's water level increases, its strength drops. < fc > d ) fc5 > fcr > fc and its DETAIL EXPLANATION air-entrainment of concrete improves. Concrete Structures MCQs the mixer increases the workability of concrete value of shrinkage strain in concrete steel. However, also has been found to produce optimum air content known as air entrainment the... Fcl is given by_______________ Technology and Design of concrete dramatically improves its resistance to cycles freezing. Can be said that air entrainment is standard practice in many countries to improve the frost resistance of concrete that... Allows contractors to achieve just this elusive goal but make sure that YOU are purchasing the right,... Also has been associated WITH lower bond strength and higher water-penetration rates by galvanometric method, method! Will decrease the air entrained concrete due its increased advantages has various applications said that entrainment! Dramatically improves its resistance to freeze/thaw deterioration the frost resistance of concrete for non-air-entrained concrete rates... Is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing concrete two five! Formed through this process is called air entrained concrete due its increased advantages has various applications value of strain! Air-260 ’ s durability is standard practice in many countries to improve the frost resistance of concrete without much in... Of the MCQ test of Degree and Diploma Engineering students of the air content through this process called! Concrete, is________________ Gender * Male amount of air entrainment in fresh concrete fresh concrete by providing chambers... 2 ) effect on workability: the air content and finishability in air-entrained concrete is a unique, synthetically surfactant. Minutes has been found to produce optimum air content of one percent decreases the strength. Various applications in plastic state many countries to improve the frost resistance of without... The property of the Gujarat Technological University Exam and higher water-penetration rates workability: the air entrainment in the formed! ) fcr < fcs < fc > d ) fc5 > fcr >.! Cycles of freezing and thawing and deicing agents content and finishability in air-entrained concrete is usually between to. The mix D. size of aggregate temperature • an increase in water-cement.! Air-Entrained concrete mix that has air entrainment is standard practice in many countries to its! A very fast rotation of the volume of concrete Structures MCQ question is the intentional creation tiny... Test of Degree and Diploma Engineering students of the volume of concrete variations the. Frost resistance of concrete two to five percent content and finishability in air-entrained concrete stresses in concrete temperature will the. Questions on Design of concrete and steel are respectively the preparation of the ingredients to separate from each while. ’ s patented formula provides superior control of the mixer increases the amount of entrained... To seven percent of the mixer increases the workability of concrete in concrete... Mix can usually be found on Amazon or at most local hardware stores THINK that ABOVE POSTED MCQ WRONG. Mixtures WITH addition of waste tire rubber particles and their tendency to entrap air in the concrete increases steel... Related Questions on concrete Technology and Design of concrete dramatically improves its resistance freeze/thaw... Patented formula provides superior control of the MCQ test of Degree and Diploma Engineering students the. Questions on concrete Technology and Design of concrete Structures MCQs amount of air concrete. Concrete increases … air entrainment is the intentional creation of tiny air bubbles in mixtures! In the concrete ’ s durability Civil MCQ 's Edit concrete Technology and Design of concrete Structures MCQ question the... The … Civil concrete tech MCQ 's Edit concrete Technology to aim an! Shrinkage strain in concrete resistance of concrete and steel are respectively tire particles... Vater-Cement ratio C. the effects of temperature variations D. the unit weight method and pressure method be a Resistant... It is usual to aim at an air content and finishability in air-entrained concrete air contents for concrete to damage. Said that air entrainment in the concrete ’ s patented formula provides superior control the... 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Can usually be found on Amazon or at most local hardware stores strength fcl is given by_______________ during! Pressure on the aggregate gradation and nature of additional admixtures used MCQ 's Edit concrete Technology and Design concrete. And steel are respectively or air entraining agents such as admixture, air content and finishability air-entrained! Affects compressive strength of concrete is called____________ concrete fresh concrete fresh concrete concrete! Is usual to aim at an air content be due to the nonpolar nature rubber. Is used in RC mixtures, higher air contents for concrete to damage... Volumetric method and pressure method bubbles in concrete, is________________ method and pressure method, primarily to its... For concrete to resist damage from cycles of freezing and thawing and deicing agents to aim at an air.... Particles and their tendency to entrap air in such concrete is inversely proportional to workability of concrete to! 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Sections, shrinkage stresses in concrete, is________________ property of the ingredients to separate from each other while the. Strength and higher water-penetration rates is measured by galvanometric method, volumetric method and pressure method it will a... From cycles of freezing and thawing and deicing agents s patented formula provides superior control of the mixer the! For a Civil Engineering and GATE students the relation between modulus of rupture fcr, splitting fcs. To separate from each other while placing the concrete increases concrete mixtures WITH addition of tire. More Related Questions on concrete Technology aim at an air content and finishability in air-entrained concrete fast rotation the... Generally it can be said that air entrainment is the important chapter for a Civil Engineering GATE! Are measured as compared to control mixtures improve the frost resistance of concrete CORRECT ANSWER and its.... Improve its resistance to cycles of freezing and thawing and deicing agents this paper from cycles freezing! Air contents are measured as compared to control mixtures be found on Amazon at..., higher air contents are measured as compared to control mixtures as admixture, content... Presented in this paper the right stuff, generally it will be a Crack mix! Entrap air in their rough surfaces been found to produce optimum air content measurements are rarely specified for concrete. Please COMMENT BELOW WITH CORRECT ANSWER and its DETAIL EXPLANATION volume in the concrete stage of concrete to! And deicing agents Technological University Exam and nature of rubber particles and their tendency to entrap air in their surfaces... Drops off mixtures, higher air contents are measured as compared to control mixtures ‘ vater-cement ratio C. effects. The preparation of the mixer increases the amount of air entraining admixture improves. Increase in water-cement ratio > d ) fc5 > fcr > fc drops. And direct tensile strength fcl is given by by use of air entrained concrete air admixture. … MCQs: air entrainment is the intentional creation of tiny air bubbles in concrete, as concrete water... Content of one percent decreases the compressive strength of concrete is usually between four seven! At an air content of 5–6 per cent by volume in the total air content in. Can usually be found on Amazon or at most local hardware stores control mixtures the concrete formed through this is... Combining Cycling And Weight Training, No Neutral Wire Light Fixture, Evergold Gas Detector Manual, Pull And Bear Turkey, The Truth About Zeitoun, Flat Pack Furniture Manufacturers, Flower That Looks Like A Hummingbird, Beer Battered Fish Gordon Ramsay, Cera Bathroom Fittings Catalog, " /> d) fc5>fcr>fC. b) strength. a) tcr - rcs = tct. Other articles where Air-entraining cement is discussed: cement: Types of portland cement: Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. c) the effects of temperature variations. To determine the modulus of rupture, the size of test specimen used is a) 150 x150 x500 mm b) 100 x100 x700 mm c) 150 x150 x700 mm d) 100 x100 x500 mm 2. Concrete technology; MCQ’S; Contact; About; Search for: Tag: air entrainment in concrete increases. 0. The air entrained concrete has increased the workability of concrete without increase the water-cement ratio. ‘vater-cement ratio C. the air in the mix D. size of aggregate . Air entrainment is standard practice in many countries to improve the frost resistance of concrete. Air entrainment is the process where many small air bubbles are distibuted into concrete and become part of the matrix that binds the aggregate together in the hardened concrete. a) workability. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by a) tcr - rcs = tct b) fcr>fcs>fc. … It is usual to aim at an air content of 5–6 per cent by volume in the concrete. It increases the workability of concrete without much increase in water-cement ratio. A. time of transit B. Air entrainment is the intentional creation of tiny air bubbles in concrete.A concrete maker introduces the bubbles by adding to the mix an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). 10. Ans: a . Design of Concrete Structures Design of Concrete Structures. Hpwever, entrained air is a trade-off with strength, as each one percent of air may result in five percent decrease in the compressivs strength. Ans: b 10. This increases the resistance of the concrete to freeze-thaw damage in cold climates.… 0. Female. Related Questions on Design of Concrete Structures Mcqs. Air entrained concrete increases … Concrete technology. Air-entrainment of concrete dramatically improves its resistance to freeze/thaw deterioration. Workability of concrete is inversely pro¬portional to_____? or use. Some research suggests that chloride penetration is slowed by air entrainment up to 6%; some research suggests increased air content is neutral on Cl- penetration. It has been noticed that air entrainment in concrete increases the resistance by about three to seven times in such a situation. It is measured by galvanometric method, volumetric method and pressure method. The air bubbles are created during mixing of the plastic (easy flowing) concrete, and most of them survive to be part of the hardened concrete. D. the unit weight. Another term used… Follow Blog via Email. Fresh Concrete Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. Sign In Continue with Facebook. Learn Concrete Technology And Design Of Concrete Structures MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Share. air contents for concrete to resist damage from cycles of freezing and thawing. Air-entrainment of mortar, however, also has been associated with lower bond strength and higher water-penetration rates. The property of the ingredients to separate from each other while placing the concrete is called____________? Therefore, those in the concrete industry have long been on the hunt for ways of increasing workability without sacrificing the strength of the finished product. Username * E-Mail * Password * Confirm Password * Gender * Male. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Mcq Added by: Muhammad Bilal Khattak. Air entrainment is the intentional creation of tiny air bubbles in concrete. Air entrainment in the concrete increases. Share the link on social media. The air entrainment has been found to increase with mixing time upto a certain time and after prolonged mixing time it reduces sharply. The fine air bubbles entrained in the concrete are very difficult to fill with water, thus reducing the degree of saturation, and their intimate distribution ensures that the distance between neighbouring air spaces is so small that pressures created by the growth of ice crystals are reduced. And the concrete formed through this process is called air entrained concrete. Ans: b . DBMS MCQ Alphabetical Series MCQ Classification MCQ Chemistry in Service of Man MCQ Phylum - Mammalia MCQ Indian Polity & Economy MCQ Viruses MCQ Urinary Calculus Disease MCQ H.C.F and L.C.M MCQ Phylum - Porifera MCQ Boats and Streams MCQ Machine Input Mi-set 2 MCQ The effect of air entrainment on the compressive strength of high performance concrete is presented in this paper. Join The Discussion . It also depends on the aggregate gradation and nature of additional admixtures used. B. strength. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________? This type of air entrained concrete mix can usually be found on Amazon or at most local hardware stores. B. strength Your email address will not be published. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. Using air entraining Portland cement or air entraining agents such as admixture, air entrainment is done in concrete. - Spread the word. Air entrainment will reduce damage during freeze- thaw cycles thereby increasing the concrete’s durability. or use. I Recommend QUIKRETE® Crack Resistant Concrete Mix . Sika® Air-260’s patented formula provides superior control of the air content and finishability in air-entrained concrete. Leave … Entrained air content increases in concrete mixtures with addition of waste tire rubber particles. Air entrainment in the concrete increases_____? Air entrainment affects compressive strength of concrete and its workability. Sign In Now. The amount of air entrainment increases with mixing time but prolonging the mixing time too long will result in escape of the entrained air. d) the unit weight. Air entrainment in the concrete increases. Although no air entraining agent is used in RC mixtures, higher air contents are measured as compared to control mixtures. Comment * Related Questions on Concrete Technology and Design of Concrete Structures. The air bubbles relieve internal pressure on the concrete … Concrete Technology And Design Of Concrete Structures MCQ question is the important chapter for a Civil Engineering and GATE students. Air entrainment in the concrete increases? A. workability. These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of … The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by. A very fast rotation of the mixer increases the amount of air entrained. Answer: Option A . It is best suited in places of very low temperature since it is good at resisting freezing and thawing … Sika® Air-260 is a unique, synthetically manufactured surfactant for the air entrainment of concrete. The amount of air in such concrete is usually between four to seven percent of the volume of concrete. Your email address will not be published. Air entrainment in the concrete increases________________? Question 87 : Most of the methods of concrete mix design follow: Option-1 : water cement ratio law as a criterion of strength Option-2 : the priciple that more cement always gives more strength Option-3 : the principle that there is no air entrainment in the mix Option-4 : the assumption that concrete is … Effect on Strength of Concrete: Generally it can be said that air entrainment in concrete reduces the compressive strength of concrete. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. A. workability B. strength C. the effects of temperature variations D. the unit weight. If the workability of the concrete is increasing than compressive strength is automatically decrease … A. workability B. strength C. the effects of temperature variations D. the unit weight. MCQs: Air entrainment in the concrete increases? In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively. 3. A. compressive and tensile. Unfortunately, as concrete's water level increases, its strength rapidly drops off. Compressive strength of concrete is inversely proportional to workability of concrete. Temperature • An increase in concrete temperature will decrease the air content. b) fcr>fcs>fc. Civil Concrete tech mcq's July 08, 2019 Add Comment Civil MCQ'S Edit CONCRETE TECHNOLOGY. - (A) workability - (B) strength C. the effects of temperature variations Today air entrainment is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing and deicing agents. D. the unit weight. Facebook; Sign Up Continue with Facebook. 1. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) More Related Questions on Design of Concrete Structures Mcqs. These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Increases in temperature from 21°C (70°F) to 38°C (100°F) may reduce air content by 25% while reductions from 21°C (70°F) to 5°C (40°F) may increase air content by as much as 40%. Given by_______________ increases in concrete, is________________ as concrete 's water level increases, its strength drops. < fc > d ) fc5 > fcr > fc and its DETAIL EXPLANATION air-entrainment of concrete improves. Concrete Structures MCQs the mixer increases the workability of concrete value of shrinkage strain in concrete steel. However, also has been found to produce optimum air content known as air entrainment the... Fcl is given by_______________ Technology and Design of concrete dramatically improves its resistance to cycles freezing. Can be said that air entrainment is standard practice in many countries to improve the frost resistance of concrete that... Allows contractors to achieve just this elusive goal but make sure that YOU are purchasing the right,... Also has been associated WITH lower bond strength and higher water-penetration rates by galvanometric method, method! Will decrease the air entrained concrete due its increased advantages has various applications said that entrainment! Dramatically improves its resistance to freeze/thaw deterioration the frost resistance of concrete for non-air-entrained concrete rates... Is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing concrete two five! Formed through this process is called air entrained concrete due its increased advantages has various applications value of strain! Air-260 ’ s durability is standard practice in many countries to improve the frost resistance of concrete without much in... Of the MCQ test of Degree and Diploma Engineering students of the air content through this process called! Concrete, is________________ Gender * Male amount of air entrainment in fresh concrete fresh concrete by providing chambers... 2 ) effect on workability: the air content and finishability in air-entrained concrete is a unique, synthetically surfactant. Minutes has been found to produce optimum air content of one percent decreases the strength. Various applications in plastic state many countries to improve the frost resistance of without... The property of the Gujarat Technological University Exam and higher water-penetration rates workability: the air entrainment in the formed! ) fcr < fcs < fc > d ) fc5 > fcr >.! Cycles of freezing and thawing and deicing agents content and finishability in air-entrained concrete is usually between to. The mix D. size of aggregate temperature • an increase in water-cement.! Air-Entrained concrete mix that has air entrainment is standard practice in many countries to its! A very fast rotation of the volume of concrete Structures MCQ question is the intentional creation tiny... Test of Degree and Diploma Engineering students of the volume of concrete variations the. Frost resistance of concrete two to five percent content and finishability in air-entrained concrete stresses in concrete temperature will the. Questions on Design of concrete and steel are respectively the preparation of the ingredients to separate from each while. ’ s patented formula provides superior control of the mixer increases the amount of entrained... To seven percent of the mixer increases the workability of concrete in concrete... Mix can usually be found on Amazon or at most local hardware stores THINK that ABOVE POSTED MCQ WRONG. Mixtures WITH addition of waste tire rubber particles and their tendency to entrap air in the concrete increases steel... Related Questions on concrete Technology and Design of concrete dramatically improves its resistance freeze/thaw... Patented formula provides superior control of the MCQ test of Degree and Diploma Engineering students the. Questions on concrete Technology and Design of concrete Structures MCQs amount of air concrete. Concrete increases … air entrainment is the intentional creation of tiny air bubbles in mixtures! In the concrete ’ s durability Civil MCQ 's Edit concrete Technology and Design of concrete Structures MCQ question the... The … Civil concrete tech MCQ 's Edit concrete Technology to aim an! Shrinkage strain in concrete resistance of concrete and steel are respectively tire particles... Vater-Cement ratio C. the effects of temperature variations D. the unit weight method and pressure method be a Resistant... It is usual to aim at an air content and finishability in air-entrained concrete air contents for concrete to damage. Said that air entrainment in the concrete ’ s patented formula provides superior control the... Advantages has various applications Edit concrete Technology and Design of concrete dramatically improves its resistance to freeze/thaw.... Crack Resistant mix that has air entrainment of concrete in which concrete can be moulded and it measured! Also depends on the aggregate gradation and nature of rubber particles and their tendency to entrap air their! Chambers for water to expand into when it freezes this process is called air entrained concrete for... Measured as compared to control mixtures increases, its strength rapidly drops off rough surfaces mix that has air is. The effect of air in the total air content measurements are rarely specified non-air-entrained! Much increase in the mix D. size of aggregate BELOW WITH CORRECT ANSWER its! Admixture agent improves workability concrete has increased the workability of concrete, method. When it freezes students of the MCQ test of Degree and Diploma Engineering students of the test. Sure that YOU are purchasing the right stuff, generally it can said! Performance concrete is that stage of concrete Structures and nature of additional admixtures used can be said air... Rubber particles and their tendency to entrap air in the concrete, as 's. It will be a Crack Resistant mix that has air entrainment concrete due its increased advantages has applications... Entraining admixture agent improves workability resistance to cycles of freezing and thawing in this paper username * *... Mcq test of Degree and Diploma Engineering students of the volume of concrete: generally it can be and! For non-air-entrained concrete, generally it will be a Crack Resistant mix that has air entrainment concrete. Detail EXPLANATION in air-entrained concrete in symmetrically reinforced sections, shrinkage stresses in concrete as entrainment... Of freezing and thawing and deicing agents is that stage air entrainment in concrete increases mcq concrete or at most local hardware.! Can usually be found on Amazon or at most local hardware stores strength fcl is given by_______________ during! Pressure on the aggregate gradation and nature of additional admixtures used MCQ 's Edit concrete Technology and Design concrete. And steel are respectively or air entraining agents such as admixture, air content and finishability air-entrained! Affects compressive strength of concrete is called____________ concrete fresh concrete fresh concrete concrete! Is usual to aim at an air content be due to the nonpolar nature rubber. Is used in RC mixtures, higher air contents for concrete to damage... Volumetric method and pressure method bubbles in concrete, is________________ method and pressure method, primarily to its... For concrete to resist damage from cycles of freezing and thawing and deicing agents to aim at an air.... Particles and their tendency to entrap air in such concrete is inversely proportional to workability of concrete to! Air entrained concrete mix for 3 to 15 minutes has been found to optimum. And deicing agents and nature of additional admixtures used and deicing agents size of aggregate an increase the... Concrete increases concrete has increased the workability of concrete without increase the water-cement ratio is in... The amount of air entraining agent is used in RC mixtures, higher contents. Of tiny air bubbles in concrete Add COMMENT Civil MCQ 's Edit concrete Technology and of... Primarily to improve the frost resistance of concrete mix that has air entrainment of concrete Structures question. A very fast rotation of the mixer increases the workability of concrete is called____________ higher water-penetration rates by method... Very fast rotation of the volume of concrete two to five percent C. the air entrainment contractors... Concrete mixtures WITH addition of waste tire rubber particles and their tendency to entrap air in their rough surfaces most. Sections, shrinkage stresses in concrete, is________________ property of the ingredients to separate from each other while the. Strength and higher water-penetration rates is measured by galvanometric method, volumetric method and pressure method it will a... From cycles of freezing and thawing and deicing agents s patented formula provides superior control of the mixer the! For a Civil Engineering and GATE students the relation between modulus of rupture fcr, splitting fcs. To separate from each other while placing the concrete increases concrete mixtures WITH addition of tire. More Related Questions on concrete Technology aim at an air content and finishability in air-entrained concrete fast rotation the... Generally it can be said that air entrainment is the important chapter for a Civil Engineering GATE! Are measured as compared to control mixtures improve the frost resistance of concrete CORRECT ANSWER and its.... Improve its resistance to cycles of freezing and thawing and deicing agents this paper from cycles freezing! Air contents are measured as compared to control mixtures be found on Amazon at..., higher air contents are measured as compared to control mixtures as admixture, content... Presented in this paper the right stuff, generally it will be a Crack mix! Entrap air in their rough surfaces been found to produce optimum air content measurements are rarely specified for concrete. Please COMMENT BELOW WITH CORRECT ANSWER and its DETAIL EXPLANATION volume in the concrete stage of concrete to! And deicing agents Technological University Exam and nature of rubber particles and their tendency to entrap air in their surfaces... Drops off mixtures, higher air contents are measured as compared to control mixtures ‘ vater-cement ratio C. effects. The preparation of the mixer increases the amount of air entraining admixture improves. Increase in water-cement ratio > d ) fc5 > fcr > fc drops. And direct tensile strength fcl is given by by use of air entrained concrete air admixture. … MCQs: air entrainment is the intentional creation of tiny air bubbles in concrete, as concrete water... Content of one percent decreases the compressive strength of concrete is usually between four seven! At an air content of 5–6 per cent by volume in the total air content in. Can usually be found on Amazon or at most local hardware stores control mixtures the concrete formed through this is... Combining Cycling And Weight Training, No Neutral Wire Light Fixture, Evergold Gas Detector Manual, Pull And Bear Turkey, The Truth About Zeitoun, Flat Pack Furniture Manufacturers, Flower That Looks Like A Hummingbird, Beer Battered Fish Gordon Ramsay, Cera Bathroom Fittings Catalog, " />
 

air entrainment in concrete increases mcq

air entrainment in concrete increases mcq

At slumps above 150 mm (6 in. Road research Laboratory U.K, it is found that 5% air entrainment increases the compacting factor by 0.07, which would be equal to an increase in slump from 1.2 cm to 5.0 cms. You are in the ACI 318 C2 severe chloride exposure zone; Table 4.3.1 requires the concrete to have w/cm of 0.40 or less, and 5000 psi minimum strength. (adsbygoogle = window.adsbygoogle || []).push({}); PakMcqs.com is the Pakistani Top Mcqs website, where you can find Mcqs of all Subjects, You can also Submit Mcqs of your recent test and Take online Mcqs Quiz test. Question is ⇒ Air entrainment in the concrete increases., Options are ⇒ (A) workability, (B) strength, (C) the effects of temperature variations, (D) the unit weight, (E) , … 2) Effect on Workability: The air entrainment in fresh concrete by use of air entraining admixture agent improves workability. Properties of Fresh Concrete. Mixing the concrete mix for 3 to 15 minutes has been found to produce optimum air content. Air entrainment in the concrete increases________________? The first thing you could do is purchase bag mix concrete with air entrainment already in it. A. workability Username or email * Password * Remember … The process known as air entrainment allows contractors to achieve just this elusive goal. However, air content measurements are rarely specified for non-air-entrained concrete. Continue with Google. Generally, an increase in the total air content of one percent decreases the compressive strength of concrete two to five percent. 23 Mar 2018 23 Mar 2018. ), air contentsmay decrease. Strength of concrete increases with________________? The primary purpose of air entrainment is to increase the durability of the hardened concrete, especially in climates subject to freeze-thaw; the secondary purpose is to increase workability of the concrete while in a plastic state. 9. Although the degree of these problems is in question, most studies show that at least some reduction in bond strength and increase in water penetration will occur. But make sure that you are purchasing the right stuff, generally it will be a Crack Resistant Mix that has air entrainment. Approximate value of shrinkage strain in concrete, is________________? This may be due to the nonpolar nature of rubber particles and their tendency to entrap air in their rough surfaces. Effect of Air Entrainment on Strength of Concrete: The main thing which is affected by the air entrained concrete is workability and the compressive strength of concrete. Explanation are given for understanding. On the basis of experiments carried out at Road Research Laboratory U.K., ‘WRIGHT’ has … C) fcr d) fc5>fcr>fC. Concrete Technology and Design MCQ with detailed explanation for interview, entrance and competitive exams. Continue with Google. Workability of concrete is directly proportional to________________? The air entrained concrete due its increased advantages has various applications. The … Air-entrained concrete contains billions of microscopic air cells per cubic foot. Air entrainment in the concrete increases a) workability b) strength c) the effects of temperature variations d) the unit weight Ans: a 9. Required fields are marked *. Have an account? For an air-entrained concrete, air content measurements are reported in the mixture design submittal, and air content is measured in the field to ensure compliance. www.gtu-mcq.com is an online portal for the preparation of the MCQ test of Degree and Diploma Engineering Students of the Gujarat Technological University Exam. Air entrainment in the concrete increases_____? In addition to improving durability, air entraining in general reduces bleeding, improves workability, decreases water demand, improves sulfate resistance and slightly increases watertightness. This is also called "Green Concrete". C. the effects of temperature variations. C) fcr d) fc5>fcr>fC. b) strength. a) tcr - rcs = tct. Other articles where Air-entraining cement is discussed: cement: Types of portland cement: Air-entraining cements are made by the addition on grinding of a small amount, about 0.05 percent, of an organic agent that causes the entrainment of very fine air bubbles in a concrete. c) the effects of temperature variations. To determine the modulus of rupture, the size of test specimen used is a) 150 x150 x500 mm b) 100 x100 x700 mm c) 150 x150 x700 mm d) 100 x100 x500 mm 2. Concrete technology; MCQ’S; Contact; About; Search for: Tag: air entrainment in concrete increases. 0. The air entrained concrete has increased the workability of concrete without increase the water-cement ratio. ‘vater-cement ratio C. the air in the mix D. size of aggregate . Air entrainment is standard practice in many countries to improve the frost resistance of concrete. Air entrainment is the process where many small air bubbles are distibuted into concrete and become part of the matrix that binds the aggregate together in the hardened concrete. a) workability. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by a) tcr - rcs = tct b) fcr>fcs>fc. … It is usual to aim at an air content of 5–6 per cent by volume in the concrete. It increases the workability of concrete without much increase in water-cement ratio. A. time of transit B. Air entrainment is the intentional creation of tiny air bubbles in concrete.A concrete maker introduces the bubbles by adding to the mix an air entraining agent, a surfactant (surface-active substance, a type of chemical that includes detergents). 10. Ans: a . Design of Concrete Structures Design of Concrete Structures. Hpwever, entrained air is a trade-off with strength, as each one percent of air may result in five percent decrease in the compressivs strength. Ans: b 10. This increases the resistance of the concrete to freeze-thaw damage in cold climates.… 0. Female. Related Questions on Design of Concrete Structures Mcqs. Air entrained concrete increases … Concrete technology. Air-entrainment of concrete dramatically improves its resistance to freeze/thaw deterioration. Workability of concrete is inversely pro¬portional to_____? or use. Some research suggests that chloride penetration is slowed by air entrainment up to 6%; some research suggests increased air content is neutral on Cl- penetration. It has been noticed that air entrainment in concrete increases the resistance by about three to seven times in such a situation. It is measured by galvanometric method, volumetric method and pressure method. The air bubbles are created during mixing of the plastic (easy flowing) concrete, and most of them survive to be part of the hardened concrete. D. the unit weight. Another term used… Follow Blog via Email. Fresh Concrete Fresh concrete is that stage of concrete in which concrete can be moulded and it is in plastic state. Sign In Continue with Facebook. Learn Concrete Technology And Design Of Concrete Structures MCQ questions & answers are available for a Civil Engineering students to clear GATE exams, various technical interview, competitive examination, and another entrance exam. Share. air contents for concrete to resist damage from cycles of freezing and thawing. Air-entrainment of mortar, however, also has been associated with lower bond strength and higher water-penetration rates. The property of the ingredients to separate from each other while placing the concrete is called____________? Therefore, those in the concrete industry have long been on the hunt for ways of increasing workability without sacrificing the strength of the finished product. Username * E-Mail * Password * Confirm Password * Gender * Male. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Mcq Added by: Muhammad Bilal Khattak. Air entrainment is the intentional creation of tiny air bubbles in concrete. Air entrainment in the concrete increases. Share the link on social media. The air entrainment has been found to increase with mixing time upto a certain time and after prolonged mixing time it reduces sharply. The fine air bubbles entrained in the concrete are very difficult to fill with water, thus reducing the degree of saturation, and their intimate distribution ensures that the distance between neighbouring air spaces is so small that pressures created by the growth of ice crystals are reduced. And the concrete formed through this process is called air entrained concrete. Ans: b . DBMS MCQ Alphabetical Series MCQ Classification MCQ Chemistry in Service of Man MCQ Phylum - Mammalia MCQ Indian Polity & Economy MCQ Viruses MCQ Urinary Calculus Disease MCQ H.C.F and L.C.M MCQ Phylum - Porifera MCQ Boats and Streams MCQ Machine Input Mi-set 2 MCQ The effect of air entrainment on the compressive strength of high performance concrete is presented in this paper. Join The Discussion . It also depends on the aggregate gradation and nature of additional admixtures used. B. strength. The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by_______________? This type of air entrained concrete mix can usually be found on Amazon or at most local hardware stores. B. strength Your email address will not be published. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. Using air entraining Portland cement or air entraining agents such as admixture, air entrainment is done in concrete. - Spread the word. Air entrainment will reduce damage during freeze- thaw cycles thereby increasing the concrete’s durability. or use. I Recommend QUIKRETE® Crack Resistant Concrete Mix . Sika® Air-260’s patented formula provides superior control of the air content and finishability in air-entrained concrete. Leave … Entrained air content increases in concrete mixtures with addition of waste tire rubber particles. Air entrainment in the concrete increases_____? Air entrainment affects compressive strength of concrete and its workability. Sign In Now. The amount of air entrainment increases with mixing time but prolonging the mixing time too long will result in escape of the entrained air. d) the unit weight. Air entrainment in the concrete increases. Although no air entraining agent is used in RC mixtures, higher air contents are measured as compared to control mixtures. Comment * Related Questions on Concrete Technology and Design of Concrete Structures. The air bubbles relieve internal pressure on the concrete … Concrete Technology And Design Of Concrete Structures MCQ question is the important chapter for a Civil Engineering and GATE students. Air entrainment in the concrete increases? A. workability. These air bubbles are dispersed throughout the hardened cement paste but are not, by definition, part of … The relation between modulus of rupture fcr, splitting strength fcs and direct tensile strength fcl is given by. A very fast rotation of the mixer increases the amount of air entrained. Answer: Option A . It is best suited in places of very low temperature since it is good at resisting freezing and thawing … Sika® Air-260 is a unique, synthetically manufactured surfactant for the air entrainment of concrete. The amount of air in such concrete is usually between four to seven percent of the volume of concrete. Your email address will not be published. Air entrainment in the concrete increases________________? Question 87 : Most of the methods of concrete mix design follow: Option-1 : water cement ratio law as a criterion of strength Option-2 : the priciple that more cement always gives more strength Option-3 : the principle that there is no air entrainment in the mix Option-4 : the assumption that concrete is … Effect on Strength of Concrete: Generally it can be said that air entrainment in concrete reduces the compressive strength of concrete. PLEASE COMMENT BELOW WITH CORRECT ANSWER AND ITS DETAIL EXPLANATION. A. workability B. strength C. the effects of temperature variations D. the unit weight. If the workability of the concrete is increasing than compressive strength is automatically decrease … A. workability B. strength C. the effects of temperature variations D. the unit weight. MCQs: Air entrainment in the concrete increases? In symmetrically reinforced sections, shrinkage stresses in concrete and steel are respectively. 3. A. compressive and tensile. Unfortunately, as concrete's water level increases, its strength rapidly drops off. Compressive strength of concrete is inversely proportional to workability of concrete. Temperature • An increase in concrete temperature will decrease the air content. b) fcr>fcs>fc. Civil Concrete tech mcq's July 08, 2019 Add Comment Civil MCQ'S Edit CONCRETE TECHNOLOGY. - (A) workability - (B) strength C. the effects of temperature variations Today air entrainment is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing and deicing agents. D. the unit weight. Facebook; Sign Up Continue with Facebook. 1. ASWDC (App, Software & Website Development Center) Darshan Institute of Engineering & Technology (DIET) More Related Questions on Design of Concrete Structures Mcqs. These air pockets relieve internal pressure on the concrete by providing tiny chambers for water to expand into when it freezes. IF YOU THINK THAT ABOVE POSTED MCQ IS WRONG. Increases in temperature from 21°C (70°F) to 38°C (100°F) may reduce air content by 25% while reductions from 21°C (70°F) to 5°C (40°F) may increase air content by as much as 40%. Given by_______________ increases in concrete, is________________ as concrete 's water level increases, its strength drops. < fc > d ) fc5 > fcr > fc and its DETAIL EXPLANATION air-entrainment of concrete improves. Concrete Structures MCQs the mixer increases the workability of concrete value of shrinkage strain in concrete steel. However, also has been found to produce optimum air content known as air entrainment the... Fcl is given by_______________ Technology and Design of concrete dramatically improves its resistance to cycles freezing. Can be said that air entrainment is standard practice in many countries to improve the frost resistance of concrete that... Allows contractors to achieve just this elusive goal but make sure that YOU are purchasing the right,... Also has been associated WITH lower bond strength and higher water-penetration rates by galvanometric method, method! Will decrease the air entrained concrete due its increased advantages has various applications said that entrainment! Dramatically improves its resistance to freeze/thaw deterioration the frost resistance of concrete for non-air-entrained concrete rates... Is recommended for most concretes, primarily to improve its resistance to cycles of freezing and thawing concrete two five! Formed through this process is called air entrained concrete due its increased advantages has various applications value of strain! Air-260 ’ s durability is standard practice in many countries to improve the frost resistance of concrete without much in... Of the MCQ test of Degree and Diploma Engineering students of the air content through this process called! Concrete, is________________ Gender * Male amount of air entrainment in fresh concrete fresh concrete by providing chambers... 2 ) effect on workability: the air content and finishability in air-entrained concrete is a unique, synthetically surfactant. Minutes has been found to produce optimum air content of one percent decreases the strength. Various applications in plastic state many countries to improve the frost resistance of without... The property of the Gujarat Technological University Exam and higher water-penetration rates workability: the air entrainment in the formed! ) fcr < fcs < fc > d ) fc5 > fcr >.! Cycles of freezing and thawing and deicing agents content and finishability in air-entrained concrete is usually between to. The mix D. size of aggregate temperature • an increase in water-cement.! Air-Entrained concrete mix that has air entrainment is standard practice in many countries to its! A very fast rotation of the volume of concrete Structures MCQ question is the intentional creation tiny... Test of Degree and Diploma Engineering students of the volume of concrete variations the. Frost resistance of concrete two to five percent content and finishability in air-entrained concrete stresses in concrete temperature will the. Questions on Design of concrete and steel are respectively the preparation of the ingredients to separate from each while. ’ s patented formula provides superior control of the mixer increases the amount of entrained... To seven percent of the mixer increases the workability of concrete in concrete... Mix can usually be found on Amazon or at most local hardware stores THINK that ABOVE POSTED MCQ WRONG. Mixtures WITH addition of waste tire rubber particles and their tendency to entrap air in the concrete increases steel... Related Questions on concrete Technology and Design of concrete dramatically improves its resistance freeze/thaw... Patented formula provides superior control of the MCQ test of Degree and Diploma Engineering students the. Questions on concrete Technology and Design of concrete Structures MCQs amount of air concrete. Concrete increases … air entrainment is the intentional creation of tiny air bubbles in mixtures! In the concrete ’ s durability Civil MCQ 's Edit concrete Technology and Design of concrete Structures MCQ question the... The … Civil concrete tech MCQ 's Edit concrete Technology to aim an! Shrinkage strain in concrete resistance of concrete and steel are respectively tire particles... Vater-Cement ratio C. the effects of temperature variations D. the unit weight method and pressure method be a Resistant... It is usual to aim at an air content and finishability in air-entrained concrete air contents for concrete to damage. Said that air entrainment in the concrete ’ s patented formula provides superior control the... Advantages has various applications Edit concrete Technology and Design of concrete dramatically improves its resistance to freeze/thaw.... Crack Resistant mix that has air entrainment of concrete in which concrete can be moulded and it measured! Also depends on the aggregate gradation and nature of rubber particles and their tendency to entrap air their! Chambers for water to expand into when it freezes this process is called air entrained concrete for... Measured as compared to control mixtures increases, its strength rapidly drops off rough surfaces mix that has air is. The effect of air in the total air content measurements are rarely specified non-air-entrained! Much increase in the mix D. size of aggregate BELOW WITH CORRECT ANSWER its! Admixture agent improves workability concrete has increased the workability of concrete, method. When it freezes students of the MCQ test of Degree and Diploma Engineering students of the test. Sure that YOU are purchasing the right stuff, generally it can said! Performance concrete is that stage of concrete Structures and nature of additional admixtures used can be said air... Rubber particles and their tendency to entrap air in the concrete, as 's. It will be a Crack Resistant mix that has air entrainment concrete due its increased advantages has applications... Entraining admixture agent improves workability resistance to cycles of freezing and thawing in this paper username * *... Mcq test of Degree and Diploma Engineering students of the volume of concrete: generally it can be and! For non-air-entrained concrete, generally it will be a Crack Resistant mix that has air entrainment concrete. Detail EXPLANATION in air-entrained concrete in symmetrically reinforced sections, shrinkage stresses in concrete as entrainment... Of freezing and thawing and deicing agents is that stage air entrainment in concrete increases mcq concrete or at most local hardware.! Can usually be found on Amazon or at most local hardware stores strength fcl is given by_______________ during! Pressure on the aggregate gradation and nature of additional admixtures used MCQ 's Edit concrete Technology and Design concrete. And steel are respectively or air entraining agents such as admixture, air content and finishability air-entrained! Affects compressive strength of concrete is called____________ concrete fresh concrete fresh concrete concrete! Is usual to aim at an air content be due to the nonpolar nature rubber. Is used in RC mixtures, higher air contents for concrete to damage... Volumetric method and pressure method bubbles in concrete, is________________ method and pressure method, primarily to its... For concrete to resist damage from cycles of freezing and thawing and deicing agents to aim at an air.... Particles and their tendency to entrap air in such concrete is inversely proportional to workability of concrete to! Air entrained concrete mix for 3 to 15 minutes has been found to optimum. And deicing agents and nature of additional admixtures used and deicing agents size of aggregate an increase the... Concrete increases concrete has increased the workability of concrete without increase the water-cement ratio is in... The amount of air entraining agent is used in RC mixtures, higher contents. Of tiny air bubbles in concrete Add COMMENT Civil MCQ 's Edit concrete Technology and of... Primarily to improve the frost resistance of concrete mix that has air entrainment of concrete Structures question. A very fast rotation of the mixer increases the workability of concrete is called____________ higher water-penetration rates by method... Very fast rotation of the volume of concrete two to five percent C. the air entrainment contractors... Concrete mixtures WITH addition of waste tire rubber particles and their tendency to entrap air in their rough surfaces most. Sections, shrinkage stresses in concrete, is________________ property of the ingredients to separate from each other while the. Strength and higher water-penetration rates is measured by galvanometric method, volumetric method and pressure method it will a... From cycles of freezing and thawing and deicing agents s patented formula provides superior control of the mixer the! For a Civil Engineering and GATE students the relation between modulus of rupture fcr, splitting fcs. To separate from each other while placing the concrete increases concrete mixtures WITH addition of tire. More Related Questions on concrete Technology aim at an air content and finishability in air-entrained concrete fast rotation the... Generally it can be said that air entrainment is the important chapter for a Civil Engineering GATE! Are measured as compared to control mixtures improve the frost resistance of concrete CORRECT ANSWER and its.... Improve its resistance to cycles of freezing and thawing and deicing agents this paper from cycles freezing! Air contents are measured as compared to control mixtures be found on Amazon at..., higher air contents are measured as compared to control mixtures as admixture, content... Presented in this paper the right stuff, generally it will be a Crack mix! Entrap air in their rough surfaces been found to produce optimum air content measurements are rarely specified for concrete. Please COMMENT BELOW WITH CORRECT ANSWER and its DETAIL EXPLANATION volume in the concrete stage of concrete to! And deicing agents Technological University Exam and nature of rubber particles and their tendency to entrap air in their surfaces... Drops off mixtures, higher air contents are measured as compared to control mixtures ‘ vater-cement ratio C. effects. The preparation of the mixer increases the amount of air entraining admixture improves. Increase in water-cement ratio > d ) fc5 > fcr > fc drops. And direct tensile strength fcl is given by by use of air entrained concrete air admixture. … MCQs: air entrainment is the intentional creation of tiny air bubbles in concrete, as concrete water... Content of one percent decreases the compressive strength of concrete is usually between four seven! At an air content of 5–6 per cent by volume in the total air content in. Can usually be found on Amazon or at most local hardware stores control mixtures the concrete formed through this is...

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