Voids are sometimes intentionally created in the precast slabs to:   Question 2 options:   reduce weight   maintain fire rating   increase thermal insulation   all of the above

Construction Materials, Methods and Techniques (MindTap Course List)
4th Edition
ISBN:9781305086272
Author:William P. Spence, Eva Kultermann
Publisher:William P. Spence, Eva Kultermann
Chapter7: Concrete
Section: Chapter Questions
Problem 6RQ: How does the addition of air-entraining materials to Portland cement improve the concrete?
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Question
Voids are sometimes intentionally created in the precast slabs to:
 

Question 2 options:

 
reduce weight
 
maintain fire rating
 
increase thermal insulation
 
all of the above
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