Concrete Technology Quiz 1

The shrinkage of concrete

Match List=I (Admixtures) with List-II (Chemicals) and select the correct answer using the codes given below the list

List-I

A) Water-reducing admixture

B) Air-entraining agent

C) Superplasticizer

D) Accelerator

List-II

1) Sulphurated melanin formaldehyde

2) Calcium chloride

3) Lignosulphonate

4) Neutralized vinsol resin

A - B - C - D

Concrete is unsuitable for compaction by a vibrator if it is

Which of the following cement has maximum percentage of C₃S

Increases in fineness of cement

Consider the following statement

When cement is tested for setting time on gauging, it shows quick setting. This phenomenon known as “Flash set” of cement. It is due to the presence of high

1) Tricalcium aluminate (C₃A) in cement

2) Alkalis in cement

3) Tricalcium silicate (C₃S) in cement

Which of these statements are correct.

To estimate 28 days crushing strength, we multiply the 7 days cube strength by

The ratio of the modulus of elasticity of the concrete to the flexural strength of concrete as per IS code 456:2000 is equal to

As per IS:456-2000, the organic content of water used for making concrete should not be more than

Weight batching proceeds on