防冻组分对水泥混凝土性能的影响研究  

Influence of Anti-freezing Components on the Properties of Cement Concrete

作　　者：王稷良[1] 孙小彬 杨志峰[1] 

机构地区：[1]交通运输部公路科学研究院,北京100088 [2]北京新桥技术发展有限公司,北京100088

出　　处：《硅酸盐通报》2014年第12期3331-3337,共7页Bulletin of the Chinese Ceramic Society

基　　金：西部交通建设科技项目(2011318223420;2013318354190)

摘　　要：试验对比研究了不同负温养护条件下,防冻组分种类与掺量对低温养护条件下混凝土工作性、力学性能以及耐久性的影响。结果表明:随着Ca Cl2、Ca(NO2)2、Ca(NO3)2等无机盐类防冻剂掺量的提高,混凝土工作性出现劣化现象。在负温养护条件下,无机防冻组分可以较好的促进混凝土强度的发展,但硬化混凝土的抗水冻融耐久性和盐冻耐久性降低。与无机防冻组分相比,乙二醇的加入可以改善混凝土的工作性与耐久性,但乙二醇作为防冻组分更适合于-10℃、-15℃等较低温度条件下使用。Influence of anti-freezing component types and addition contents in low temperature concrete on its workability,mechanical properties and durability when applied different negative temperature curing condition was studied comprehensively. The results show that concrete workability reduces with the increasing content of anti-freezing components such as Ca Cl2,Ca（ NO2）2,Ca（ NO3）2. Under negative temperature curing condition,the inorganic anti-freezing components improve much on the anti-freezing ability,but the anti-freezing and thawing durability to water and salt decreases. Compared to inorganic anti-freezing components,adding of ethylene glycol can improve the workability and later-age durability of concrete. Furthermore, ethylene glycol as anti-freezing component is more appropriate to lower temperature conditions such as- 10 ℃ and- 15 ℃.

关 键 词：混凝土 防冻组分 工作性 力学性能 耐久性 

分 类 号：TU528[建筑科学—建筑技术科学]