不同养护方式下复合矿物掺合料混凝土的性能研究  

Study on properties of composite mineral admixture concrete under different curing methods

作　　者：李彦贺 贺茂军 周能源 张国胜 LI Yanhe;HE Maojun;ZHOU Nengyuan;ZHANG Guosheng(China Construction Frist Group Corporation Limited,Tianjin 300452,China;Department of Civil Engineering,Tsinghua University,Beijing 100084,China)

机构地区：[1]中建一局(集团)有限公司华北公司,天津300452 [2]清华大学土木工程系,北京100084

出　　处：《混凝土》2023年第3期158-162,共5页Concrete

基　　金：国家自然科学基金面上项目(51478248)。

摘　　要：针对纯水泥以及复合粉煤灰-钢渣、复合粉煤灰-石灰石粉矿物掺合料的混凝土体系,研究了不同养护方式对其微观结构、力学性能、耐久性的影响。结果表明:复合掺合料可明显降低胶凝材料体系的早期放热量,而高温养护可以显著细化复合矿物掺合料体系的孔隙结构。另外,高温养护可以提高复合矿物掺和料的混凝土抗压强度、劈裂抗拉强度、抗氯离子渗透性、抗碳化性能。其中,在高温养护下,复合粉煤灰-钢渣掺合料混凝土的力学性能和耐久性最优,超过了纯水泥混凝土体系。The effects of different curing methods on the microstructure,mechanical properties and durability of concrete system composed of pure cement,fly ash-steel slag and fly ash-limestone powder mineral admixture were studied.The results show that the composite admixture can obviously reduce the early heat release of the cementitious material system,while the high temperature curing can obviously refine the pore structure of the composite mineral admixture system.In addition,high temperature curing can improve the compressive strength,splitting tensile strength,chloride ion penetration resistance and carbonation resistance of concrete with composite mineral admixture.Among them,under high temperature curing,the mechanical properties and durability of composite fly ash-steel slag admixture concrete are the best,which exceeds that of pure cement concrete system.

关 键 词：养护方式 复合矿物掺合料 微观结构 力学性能 

分 类 号：TU528.062[建筑科学—建筑技术科学]