supported by part of the Key Project of the China Postdoctoral Science Foundation(Nos.20080430183 and 200801386);the Promotional Foundation for Excellent Middle-aged or Young Scientists of Shandong Province(No.2008BS08001);National Basic Research Program(No.2007CB714202)
The experimental study of air-entrained concrete specimens subjected to different cycles of freeze-thaw was completed. The dynamic modulus of elasticity, weight loss, the cubic compressive strength, compressive streng...