a type of zeolite from the analcime family was prepared by using triethanolamine, silica gel and sodium aluminate. the average particle size was around 24 µm. ftir, xrd and sem results approved the type of zeolite which was formed

The addition of active seed for increasing the precipitation rate leads to formation fine Al(OH)3 particles that complicates separation solid from mother liquor. In this study, enhanced coarse sodium aluminate solution using agglomerated was investigated. Aluminum salt (Al2(SO4)3) were used at initial process. About 50% obtained when these agglomerates as a in amount 20 g L−1 25 °C within 10 h....

Calcium aluminate cement (CAC) suffers from loss of workability in less than an hour (~15 minutes) after first touch of water. Current superplasticizers that are utilized to modify the viscosity of cement admixtures are designed to target ordinary Portland cement (OPC). The high affinity between these superplasticizers and cement particles were found to be detrimental in CAC systems. Utilizatio...

Shotcrete is often in direct contact with groundwater containing sulfate. The resistance to sulfate attack of modern sprayed concretes produced non-alkali aluminate-based accelerators combination different cement types related their microstructure, transport properties, porosity and phase composition. A characterization these properties allows a comprehensive assessment the shotcrete identifica...