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ACI 305.R.91 specifies Evaporation rate __ kg/hr/m^2 should be avoided to prevent plastic cracking.

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ACI 305.R.91 specifies Evaporation rate __ kg/hr/m^2 should be avoided to prevent plastic cracking.

(a) <.5

(b) =0.5

(c) >.5

(d) Not equal to .5

This question was addressed to me by my college professor while I was bunking the class.

This intriguing question comes from Types of Shrinkage in division Elasticity, Creep and Shrinkage of Concrete Technology

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Right choice is (c) >.5

To elaborate: ACI 305.R.91 specifies Evaporation rate >0.5 kg/hr/m^2 should be avoided to prevent plastic cracking.

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