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矿渣-高贝利特硫铝酸盐水泥复合体系抗氯离子渗
作者：兰明章1，蔡永慧1，靳耀乐1，葛仲熙2，刘承建2，王剑锋1
（1.北京工业大学 材料科学与工程学院，北京 100124；2.唐山北极熊建材有限公司，河北 唐山 063705）
摘要：通过氯离子扩散系数、氯离子结合能力、MIP、XRD、TG-DSC、SEM研究了矿渣掺量对高贝利特硫铝酸盐复合体系抗氯离子渗透性能的影响，并对机理进行了分析。结果表明：随着矿渣掺量的增加，复合体系的氯离子扩散系数先减小后增大，当矿渣掺量为20%时，氯离子扩散系数最低，为98.7×10-14 m2/s；进一步研究发现，高贝利特硫铝酸盐水泥促进了矿渣的火山灰反应，提高了C-S-H凝胶的生成量，提高了氯离子的结合能力，降低了水化产物结构的孔隙率。
关键词：高贝利特硫铝酸盐水泥；矿渣；氯离子扩散系数；氯离子结合能力；孔结构
中图分类号：TU528.041 文献标识码：A 文章编号：1001-702X（2018）11-0036-05
Study on the resistance to chloride ion penetration of slag-high belite sulphoaluminate composite
LAN Mingzhang1，CAI Yonghui1，JIN Yaole1，GE Zhongxi2，LIU Chengjian2，WANG Jianfeng1
（1.School of Materials Science and Engineering，Beijing University of Technology，Beijing 100124，China；
2.Tangshan Polar Bear Building Materials Co. Ltd.，Tangshan 063705，China）
Abstract：The chloride ion diffusion coefficient，chloride ion binding capacity，MIP，XRD，TG-DSC and SEM were used to study the effect of slag content on the resistance to chloride ion penetration of the high belite sulphoaluminate composite system. Permeability and mechanism were analyzed. The results showed that with the increase of slag content，the chloride diffusion coefficient of composite cement mortar decreased first and then increased. When the slag content was 20%，the lowest chloride ion diffusion coefficient was 98.7×10-14 m2/s. Further studies showed that high belite sulphoaluminate cement promoted the pozzolanic reaction of slag，increased the formation of CSH gel，improved the binding capacity of chloride ion and decreased the porosity of hydrated product structure.
Key words：high belite sulphoaluminate cement，slag，chloride diffusion coefficient，chloride ion binding ability，pore structure