5DAVIDOVITS J. What future for Portland cement? [A] Symposium on Cement and Concrete in the Global Environment[C], Chicago, 1993: 10.
6Palomo A, Maclas A, Blanco M T, et al. Physical chemical and mechanical characterization of geopolymers [A].Proc 9th Int Congr Chem Cem[C], 1992: 505-511.