MATERIALS (CONCRETE, CHAPTER 4.4)

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FINAL EXAMINATION

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MATERIALS (CONCRETE, CHAPTER 4.4)Online version FINAL EXAMINATION by Grace Balahay 1 is an artificial stone as a result of mixing cement, fine aggregate (sand), coarse aggregate (gravel) and water Written answer 2 the solid mass is called Written answer 3 Concrete with reinforcement embedded in the mixture such as the two materials act together in resisting forces is called Written answer 4 becomes hard within a week but the hardening process may continue for months to some extent Written answer 5 the degree of wetness of the concrete mix. This depends on the amount of water in the mixture Written answer 6 the ease in which fresh concrete can be molded or deformed without segregation Written answer 7 the capacity of concrete to move/flow during vibration Written answer 8 is subjected to compressive, tensile, flexural and shearing forces. The strength of concrete is measured in its ability to resist the stresses caused by these different forces. Written answer 9 ability of concrete to resist deterioration Written answer 10 reacts to most acids since it is the chemical base of concrete. In some cases, even the highest quality concrete must be protected from direct contact with corrosive chemicals. Written answer 11 hardens the concrete surface by chemical reaction and makes it more impervious to chemical attack Written answer 12 weighs 360-1,920 kg/m3 Written answer 13 for insulation purposes, rarely exceeds 800 kg/m3 Written answer 14 used commonly to fill over light gauge steel floor panels. Weighs 360-960 kg/m3 and with a compressive strength of 70-176 kg/cm2 Written answer 15 similar to medium stone concrete. Widely used in buildings, roads, bridges, etc. Weighs 1,440-1,920 kg/m3 Written answer 16 used as a structural concrete, weighs 325-2,435 kg/m3 Written answer 17 used as a shield against gamma rays reactor and other similar structures. Also used as a counter weight in lift bridges. It contains cement, heavy iron ore, crushed rock, steel scraps and punchings or shot as fine aggregate. Weighs 3,200-5,000 kg/m3 depending on the kind of aggregate used. Written answer 18 American scientist _________ discovered in 1918 that the ratio of the amount of water to the amount of cement (water-cement ratio) in a concrete mix is related to the strength and quality of the concrete Written answer 19 air-entraining agent Written answer 20 The amount of the ingredients in a concrete mix is expressed as Written answer 21 a good concrete can be produced by hand mixing if the fine and coarse aggregates are clean and graded well Written answer 22 the use of mechanical mixers Written answer 23 the concrete is mixed at the batching plant by mechanical mixers and then loaded to trucks for delivery to the site Written answer 24 means the separation of the sand and gravel from the cement paste which causes inferior quality of concrete Written answer

MATERIALS (CONCRETE, CHAPTER 4.4)Online version

FINAL EXAMINATION

by Grace Balahay

is an artificial stone as a result of mixing cement, fine aggregate (sand), coarse aggregate (gravel) and water

Written answer

the solid mass is called

Written answer

Concrete with reinforcement embedded in the mixture such as the two materials act together in resisting forces is called

Written answer

becomes hard within a week but the hardening process may continue for months to some extent

Written answer

the degree of wetness of the concrete mix. This depends on the amount of water in the mixture

Written answer

the ease in which fresh concrete can be molded or deformed without segregation

Written answer

the capacity of concrete to move/flow during vibration

Written answer

is subjected to compressive, tensile, flexural and shearing forces. The strength of concrete is measured in its ability to resist the stresses caused by these different forces.

Written answer

ability of concrete to resist deterioration

Written answer

reacts to most acids since it is the chemical base of concrete. In some cases, even the highest quality concrete must be protected from direct contact with corrosive chemicals.

Written answer

hardens the concrete surface by chemical reaction and makes it more impervious to chemical attack

Written answer

weighs 360-1,920 kg/m3

Written answer

for insulation purposes, rarely exceeds 800 kg/m3

Written answer

used commonly to fill over light gauge steel floor panels. Weighs 360-960 kg/m3 and with a compressive strength of 70-176 kg/cm2

Written answer

similar to medium stone concrete. Widely used in buildings, roads, bridges, etc. Weighs 1,440-1,920 kg/m3

Written answer

used as a structural concrete, weighs 325-2,435 kg/m3

Written answer

used as a shield against gamma rays reactor and other similar structures. Also used as a counter weight in lift bridges. It contains cement, heavy iron ore, crushed rock, steel scraps and punchings or shot as fine aggregate. Weighs 3,200-5,000 kg/m3 depending on the kind of aggregate used.

Written answer

American scientist _________ discovered in 1918 that the ratio of the amount of water to the amount of cement (water-cement ratio) in a concrete mix is related to the strength and quality of the concrete

Written answer

air-entraining agent

Written answer

The amount of the ingredients in a concrete mix is expressed as

Written answer

a good concrete can be produced by hand mixing if the fine and coarse aggregates are clean and graded well

Written answer

the use of mechanical mixers

Written answer

the concrete is mixed at the batching plant by mechanical mixers and then loaded to trucks for delivery to the site

Written answer

means the separation of the sand and gravel from the cement paste which causes inferior quality of concrete

Written answer

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MATERIALS (CONCRETE, CHAPTER 4.4)

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MATERIALS (CONCRETE, CHAPTER 4.4)Online version

by Grace Balahay

is an artificial stone as a result of mixing cement, fine aggregate (sand), coarse aggregate (gravel) and water

the solid mass is called

Concrete with reinforcement embedded in the mixture such as the two materials act together in resisting forces is called

becomes hard within a week but the hardening process may continue for months to some extent

the degree of wetness of the concrete mix. This depends on the amount of water in the mixture

the ease in which fresh concrete can be molded or deformed without segregation

the capacity of concrete to move/flow during vibration

is subjected to compressive, tensile, flexural and shearing forces. The strength of concrete is measured in its ability to resist the stresses caused by these different forces.

ability of concrete to resist deterioration

reacts to most acids since it is the chemical base of concrete. In some cases, even the highest quality concrete must be protected from direct contact with corrosive chemicals.

hardens the concrete surface by chemical reaction and makes it more impervious to chemical attack

weighs 360-1,920 kg/m3

for insulation purposes, rarely exceeds 800 kg/m3

used commonly to fill over light gauge steel floor panels. Weighs 360-960 kg/m3 and with a compressive strength of 70-176 kg/cm2

similar to medium stone concrete. Widely used in buildings, roads, bridges, etc. Weighs 1,440-1,920 kg/m3

used as a structural concrete, weighs 325-2,435 kg/m3

used as a shield against gamma rays reactor and other similar structures. Also used as a counter weight in lift bridges. It contains cement, heavy iron ore, crushed rock, steel scraps and punchings or shot as fine aggregate. Weighs 3,200-5,000 kg/m3 depending on the kind of aggregate used.

American scientist _________ discovered in 1918 that the ratio of the amount of water to the amount of cement (water-cement ratio) in a concrete mix is related to the strength and quality of the concrete

air-entraining agent

The amount of the ingredients in a concrete mix is expressed as

a good concrete can be produced by hand mixing if the fine and coarse aggregates are clean and graded well

the use of mechanical mixers

the concrete is mixed at the batching plant by mechanical mixers and then loaded to trucks for delivery to the site

means the separation of the sand and gravel from the cement paste which causes inferior quality of concrete