Studi Parametrik Kuat Tekan Mortar Geopolimer Abu Terbang
Keywords:curing, fly ash, geopolymer, parametric study
Fly ash is a residue from coal-burning activities that is fine granules or powder, generally used for landfills and plant fertilizer. Fly ash can be used as partial replacement of cement in mortar. Materials that use fly ash are activated by a combination of sodium hydroxide and sodium silicate known as geopolymers. This study, fly ash was used in class F and was used for the source material, a mortar for plaster. Parametric studies were aimed to find out the optimum composition of the parameters by sodium hydroxide concentration, modulus silicate, and additional OPC that fly ash geopolymer mortar was cured in ambient condition. The mortar was made by mixing fly ash, sand, sodium hydroxide, and sodium silicate, and superplasticizer, then the mortar was moulded and rested for three days. Samples were cured in ambient condition, and compressive strength tests of mortar were carried out on 7, 14, and 28 days. The result of parametric studies showed the optimum composition of fly ash geopolymer mortar in ambient conditions that can be made with a combination of 12M sodium hydroxide, modulus silicate 2, and additional OPC of 30%.
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