Civil Engineering MCQAE Level Civil Engineering
Air-entraining admixtures improve freeze-thaw durability mainly by:
Building MaterialsConstruction Materials, Practices, Planning and ManagementHARD
Choose the correct answer
A
reducing all pores to zero
B
providing microscopic air voids for ice expansion relief
C
increasing bleeding deliberately
D
eliminating cement hydration
Correct Answer
B. providing microscopic air voids for ice expansion relief
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Entrained air voids provide pressure relief spaces when water freezes, improving freeze-thaw resistance.
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