低温养护下引气混凝土的孔结构对力学性能及耐久性能影响研究  

Effect of the Pore Structure of Air Concrete on the Mechanical Properties and Durability at Low Temperature Curing

作　　者：王庆石[1] 张凯[1] 王起才[1] 于本田[1] 李盛[1] 

机构地区：[1]兰州交通大学土木工程学院,兰州730070

出　　处：《硅酸盐通报》2015年第8期2095-2099,共5页Bulletin of the Chinese Ceramic Society

基　　金：长江学者和创新团队发展计划资助(IRT1139);国家自然科学基金资助项目(51268032);铁道部科技研究开发计划项目(2010G019-A)

摘　　要：本文通过对3℃、10℃及20℃养护下的含气混凝土进行孔结构、抗冻性、电通量及抗压强度的测试,研究了孔结构与混凝土的抗冻性、电通量及抗压强度的关系,结果表明:随着含气量的增大,混凝土孔结构变化由不明显到明显,抗冻耐久性先增强再逐渐变弱,电通量有一个先减小后增大的过程,抗压强度逐渐减小;随着温度的升高,混凝土孔结构变化明显,抗冻性及抗渗性逐渐增强,抗压强度逐渐提高。The air concrete was conducted by the pore structure, frost resistance, electric flux, compressive strength under 3 ℃, 10 ℃ and 20℃curing, studying the relationship between pore structure and frost resistance of concrete, electric flux and compressive strength. The experimental results show that the pore structure of concrete of change is not obvious to the obvious, the frost durability enhances first and then becomes weakness gradually, the electric flux decreases first and then increases and the compressive strength decreases gradually with the air content increasing. The pore structure of concrete changes obviously, the frost resistance and impermeability enhance gradually and the compressive strength increase gradually with the temperature increasing, aches to the maximum of 50.8 MPa. And then it decreases with curing temperature.

关 键 词：孔结构 抗冻性 电通量 抗压强度 含气量 

分 类 号：TU528[建筑科学—建筑技术科学]