The combined effect of dipotassium hydrogen phosphate and paper mill sludge ash towards formation of efflorescence and properties of fly ash geopolymer mortar
The use of aluminosilicate source with high amount of CaO has been widely used in geopolymer due to its high compressive strength at early age. The presence of Ca2+ is able to accelerate the geopolymerization process, hence produces large amount of geopolymer matrices. Nevertheless, excessive amount...