Density and morphology studies on bottom ash and fly ash geopolymer brick
2017
This paper studies the finding density and morphology analysis of geopolymer bricks using bottom ash and fly ash as a geopolymer raw material. The study has been conducted to produce bottom ash and fly ash geopolymer bricks by varying the ratio of fly ash/bottom ash, ratio solid/liquid and ratio sodium silicate (Na2SiO3)/ sodium hydroxide (NaOH) in the mix design. The compressive strength range between 3.8-4.5 Mpa was obtained in theprevious study [9]. The density and morphology analysis are done based on the optimum ratio selected from bottom ash/fly ash, solid/liquidand Na2SiO3/NaOH which is 1:2, 2.0 and 4.0 respectively for non-loading application brick. The morphology analysis of the bricks is closely related to the density recorded. The highest density shows the highest value of compressive strength and a denser microstructure of morphology.
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