含铝矿物相在胶凝体系中的水化机理研究进展

含铝矿物相对水泥与工业废渣的水化反应、火山灰活性材质发生土聚反应等过程中形成性能优良的地质聚合物具有不可或缺的作用。综述了含铝矿物相水化铝酸钙(C-A-H)、水化硫铝酸钙(C-A-S--H)、水化硅铝酸钙(C-A-S-H)及水化氯铝酸钙(C-A-Cl-H)胶凝体系中铝相的水化机理,对含铝矿物相在这几种胶凝体系中的形成与反应规律进行了总结。高铝水泥中加入合适添加剂可以提高水泥强度和稳定性,铝取代硅导致电荷不平衡,能够强烈吸引并固定重金属等有害离子;铝酸钙与氯离子作用后能够直接对氯离子进行固定,为危险废弃物的稳定化和无害化处理提供了新思路。指出今后应加强含铝矿物相在不同化学组成的胶凝体系中的形成与转变规律研究。

Research Status of Hydration Mechanism of Alumino-Based Cementitious System

The aluminum-containing mineral phase has large indispensable effect in the formation of excellent geopolymers in the hydration reaction of cement and industrial waste slag, and the geopolymerization of pozzolan active materials. Reviews the hydration mechanism of calcium aluminate hydrate（C-A-H）,calcium sulphoaluminate hydrate（C-A-[S]-H）, calcium aluminosilicate hydrate（C-A-S-H）and calcium chloroaluminate hydrate（C-A-Cl-H） cementitious system. Summarized the formation and reaction laws of the aluminum-containing mineral phase in these types of gelling systems. Adding appropriate additives to high alumina cement can improve the strength and stability of cement. Aluminum replaces silicon, which leads to charge imbalance and can strongly attract and fix heavy metals and other harmful ions. After the interaction of calcium aluminate and chloride ions, chloride ions can be directly fixed, which provides a new idea for the stabilization and harmless treatment of hazardous waste. It is pointed out that the study on the formation and transformation of aluminum-bearing mineral phases in the cementitious systems with different chemical compositions should be pay more attention to.