Influence of OPC replacement and manufacturing procedures on the properties of self-cured geopolymer

Geopolymer typically achieves its strength by heat curing, which is a limitation for in-field applications. This study develops self-cured technologies for fly ash-based geopolymer curing in ambient conditions without external heat supply. Two approaches, (i) the combination of OPC and Geopolymer (GeoPC), and (ii) different manufacturing procedures, were investigated. The results showed that the self-cured GeoPC could be developed with the setting time, early strength and microstructures of GeoPC enhancing when the amount of OPC replacement increased. The manufacturing procedure also directly influenced the solidifying behaviour and early strength development of geopolymer cement. (C) 2014 Elsevier Ltd. All rights reserved.