高低温环境下混凝土有机-无机复合抗裂养护剂的制备及性能研究  

Preparation and performance study of organic-inorganic composite anti-cracking curing agent for concrete in high and low temperature environments

作　　者：吉久发 叶梦煊 曹志国 谷雷雷 王倩倩 JI Jiufa;YE Mengxuan;CAO Zhiguo;GU Leilei;WANG Qianqian(Haiwei Engineering Construction Co.,Ltd.of FHEC of CCCC,Beijing 101119,China;College of Materials Science and Engineering,Nanjing Tech University,Nanjing 211816,China)

机构地区：[1]中交一公局海威工程建设有限公司,北京101119 [2]南京工业大学材料科学与工程学院,江苏南京211816

出　　处：《混凝土与水泥制品》2024年第12期1-8,共8页China Concrete and Cement Products

基　　金：国家自然科学基金项目(52072171)。

摘　　要：制备了适用于高低温环境的混凝土有机-无机复合抗裂养护剂(OICCA养护剂),研究了其对混凝土保水性能、力学性能及耐久性能的影响,并与两种市售养护剂(E-201、TSD)进行了对比,分析了其作用机理。结果表明:在40℃高温和-8℃低温环境下,与未涂覆养护剂的空白组相比,涂覆OICCA养护剂试件的抗裂性能显著提高;涂覆养护剂有效提高了混凝土的保水性能、力学性能及耐久性能;与E-201、TSD养护剂相比,OICCA养护剂的养护效果总体上相对较好;OICCA养护剂中的有机组分能使其成膜效果较好,无机组分能与水泥水化产物反应生成结晶物质密实孔隙,二者协同作用提升了混凝土的性能。A concrete organic-inorganic composite anti-cracking curing agent(OICCA curing agent)suitable for high and low temperature environments was prepared.Its effects on the water retention,mechanical properties,and durability of concrete were studied,and compared with two commercially available curing agents(E-201,TSD)to analyze their mechanisms of action.The results show that under high temperature of 40℃and low temperature of-8℃,compared with the blank group without coating curing agent,the crack resistance of OICCA curing agent coated specimens is significantly improved.The application of curing agents effectively improves the water retention,mechanical properties,and durability of concrete.Compared with E-201 and TSD curing agents,OICCA curing agent has a relatively better overall curing effect.The organic components in OICCA curing agent can achieve better film-forming effect,while the inorganic components can react with cement hydration products to form crystalline substances and compact pores.The synergistic effect of the two enhances the performance of concrete.

关 键 词：有机-无机复合抗裂养护剂 混凝土 保水性能 力学性能 耐久性能 作用机理 

分 类 号：TU599[建筑科学—建筑技术科学]