Question

The cement concrete, from which entrained air and excess water are removed after placing it in position, is called ________

(a) Vacuum concrete

(b) LWC

(c) Prestressed concrete

(d) Sawdust concrete

This question was addressed to me during an online interview.

I want to ask this question from Special Concrete topic in section Special Concrete and Concreting Methods of Concrete Technology

Answer 1

The correct answer is:

(a) Vacuum concrete

Vacuum concrete is a type of concrete from which air and excess water are removed after it is placed in position by using a vacuum process. This helps in increasing the strength and durability of the concrete by reducing the amount of water in the mix and enhancing its compactness.