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

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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

I got this question in an international level competition.

I need to ask this question from Light Weight Concrete in portion Special Concrete and Concreting Methods of Concrete Technology

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The correct choice is (a) Vacuum concrete

Explanation: Vacuum concrete is the type of concrete in which the excess water is removed for improving concrete strength. The water is removed by use of vacuum mats connected to a vacuum pump.

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