Investigation of the relationship between the condensed structure and the chemically bonded water content in the network of geopolymer cements

摘要

1. The specific surface area of silica fume (170 m~2/g) is higher than the one of waste glass (0.9 m~2/g) and the hardener from the silica fume is more reactive than the one from waste glass. 2. The compressive strength of the geopolymer cement from silica fume (62 Mpa) is greater than the one from waste glass (26 Mpa); 3. The results of NMR-MAS (29)~Si show that the geopolymer obtained using hardener from silica fume contains the significant amount of aluminum in its structure; 4. The results of mercury intrusion porosimetry show that the average pore diameter of the geopolymer cement obtained using hardener from silica fume is lowest than the one from waste glass. This shows that the specimen from silica fume is a highly cross-linking geopolymer network.