Review on the Fresh Properties of Calcined and Uncalcined Laterite-Based Geopolymer Binders
摘要
Fresh properties of calcined and uncalcined laterite based-geopolymer binders means calcined and uncalcined laterite based-geopolymer binders which are just mixed and are about to place in the forms. Properties of fresh calcined and uncalcined laterite based-geopolymer binder controls long term behavior of the calcined and uncalcined laterite based-geopolymer binders. Properties of fresh calcined and uncalcined laterite based-geopolymer binders include workability, air content, temperature and setting time i.e. initial and final setting time etc. This paper presents the review of literature on the fresh properties of materials obtained from alkali activated laterite. The outcomes from this study revealed that calcium–silicate–hydrate (C–S–H), iron–calcium–aluminium–silicate–hydrate (Fe– C(A)SH) and stabilized precursors i.e. laterite and pozzolans had initial setting time of 50, 38, 30, and 53 mins, respectively, while the final setting time were 69, 50, 47, and 70 mins, respectively. This review also demonstrated that there is lack of study on fresh properties such as workability, air content, temperature etc. on calcined and uncalcined laterite based-geopolymer binders. It was also found that calcined and uncalcined laterite based-geopolymer binders have shorter initial and final setting time compared to Portland cement.