If the coefficient of thermal expansion of coarse aggregates and cement paste differs too much, then what happen?

No change

A small change in pressure may introduce

A small change in temperature may introduce

A large change in temperature may introduce

Correct Answer : A large change in temperature may introduce

Explanation : If it happens then a large change in temperature may introduce differential movement which may break the bond between the aggregates and the paste.

Recently Updated in Concrete Technology Questions

Which of the following compound is used for fine polishing?

Nitric oxide

Iron oxide

Silicon carbide

Aluminum oxide

Correct Answer : Option (D) : Aluminum oxide

Explanation : Powder form of aluminum oxide is used for fine polishing process. It is surface treatment process.

Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by __________

IS 456-2010

IS 456-2000

IS 465-2000

IS 513-1999

Correct Answer : Option (B) : IS 456-2000

Explanation : Option can be eliminated because there is no such code. Maximum nominal size of aggregates to be used in concrete may be as large as possible within the limits prescribed by IS 456:2000.

Air contents should be _________ % by volume.

1-2

2-3

3-4

4-5

Correct Answer : Option (C) : 3-4

Explanation : This type of cement was first of all developed in U.S.A. It is recommended that air contents should be 03-04 % by volume.