DEVELOPMENT OF HIGH-PERFORMANCE GEOPOLYMER PASTE UTILIZING LOCALLY NANO-METAKAOLIN
DOI:
https://doi.org/10.11113/jurnalteknologi.v88.24024Keywords:
Geopolymer, metakaolin, SEM, compressive strength, water absorptionAbstract
Geopolymers have attracted the attention of researchers due to their exceptional performance and potential to replace Portland cement-based materials, attributed to their low energy consumption and reduced global warming potential This work goal is to develop a high performance geopolymer paste (GP) and investigate the effect of varying water to metakaolin ratio dosages, as well as the impact of different silica to alumina ratio on it. Nine mixes were cast and curing for 28 days at ambient temperature. Compressive tests were performed at 7 and 28 days to evaluate mechanical qualities. Other parameters, including bulk density, porosity, water absorption, chemical compositions (analyzed by XRD), and microstructural features (analyzed by SEM), were also measured. Results showed that the optimal silica to alumina ratio and water to metakaolin ratio is 1.825 and 0.54 respectively that generate the highest compressive strength (88.4 Mpa) with lower water absorption (22.7 %), porosity (32.3%), and density (1.45%).
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