Question

After vacuum mixing, the volumetric shrinkage can be raised from 3–5% to __________ % in different cements.

(a) 1-2

(b) 3-5

(c) 5-7

(d) 6-8

The question was asked by my college director while I was bunking the class.

My question is from Hot Weather Concreting, Prepacked and Vacuum Cement topic in portion Special Concrete and Concreting Methods of Concrete Technology

Answer 1

The correct answer is (c) 5-7

To explain: The volumetric shrinkage can be raised from 3–5 % to 5-7 % in different cements after mixing vacuum into it.