A thin weak layer of fines and water is found on a slab surface where new topping must bond. In concrete work, that surface condition is best described as what?
Correct Answer
B) Laitance
Laitance is the weak surface layer of water, cement fines, and fine aggregate that can interfere with bond. Other choices: efflorescence is salt deposit, plastic shrinkage is a cracking mechanism, and entrained air is a designed air-void system.
Why This Is the Correct Answer
Laitance is the weak surface layer of water, cement fines, and fine aggregate that can interfere with bond. Other choices: efflorescence is salt deposit, plastic shrinkage is a cracking mechanism, and entrained air is a designed air-void system.
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