《Behavior of air-entrained concrete after freeze-thaw cycles》.pdf

Acta Mechanica Solida Sinica, Vol. 22, No. 3, June, 2009 ISSN 0894-9166 Published by AMSS Press, Wuhan, China BEHAVIOR OF AIR-ENTRAINED CONCRETE AFTER FREEZE-THAW CYCLES⋆⋆ Huaishuai Shang1,2⋆ Yupu Song3 Jinping Ou3 1 ( State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024, China) 2 ( Shandong Provincial Academy of Building Research, Jinan 250031, China) 3 ( State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, China) Received 26 March 2008, revision received 2 March 2009 ABSTRACT 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 strength, tensile strength and cleavage strength of air-entrained concrete were measured after 0, 100, 200, 300, 400 cycles of freeze-thaw. The experimental results showed that the dynamic modulus of elasticity and strength decreased as the freeze-thaw was repeated. The influences of freeze-thaw cycles on the mechanical properties, the dynamic modulus of elasticity and weight loss were analyzed according to the experimental results. It can serve as a reference for the maintenance, design and the life prediction of dams, hydraulic structures, offshore structures, concrete roads and bridges in northern cold regions. KEY WORDS air-entrained concrete, freeze-thaw cycles, mechanical properties, the dynamic mod- ulus of elastic