碱激发钢渣矿渣胶凝材料凝结硬化性能研究

Research on the Setting and Hardening Performance of Alkali-activated Steel Slag-slag Based Cementitious Materials

通过对胶凝材料强度、水化热的测定和对水化产物种类及表观形貌的分析,探讨了缓凝剂和钢渣掺量对碱激发钢渣矿渣胶凝材料性能的影响,并对其水化特性进行了研究.结果表明:钢渣掺量为40%、矿渣掺量为60%时,外掺6%水玻璃激发剂和1%的K缓凝剂,所制得的胶凝材料的凝结时间和强度可以达到42.5R普通硅酸盐水泥的技术要求;碱激发钢渣矿渣胶凝材料的放热特性与碱激发矿渣胶凝材料类似,具有放热量小的特点;钢渣与矿渣组合有利于胶凝体系水化进程的发展,两者具有相互促进的作用.

The effect of retarders,the dosage of steel slag on the properties of alkali-activated steel slag-slag based cementitious materials and the hydration characteristics of complex binding material were studied by the determi-nation of strength and hydration heat evolution as well as type of hydration products and micromorphology of hardened paste.The results show that the properties of the setting time and the strength of binding material,with a composi-tion of steel slag of 40%,blast furnace slag of 60 %,alkali activator of 6% and retarder K of 1%,can match the standard of grade 42.5R ordinary Portland cement.The hydration heat release characteristics of alkali-activated steel slag-slag based cementitious materials are similar to alkali-activated slag cement,and the accumulative heat is limited. Steel slag and slag have a positive interaction,and the combination is beneficial to the development of the hydration process of the system.