PHYSICAL PROPERTIES OF GEOPOLYMER MORTAR PALM OIL FUEL ASH
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Abstract
This research studies the development for using palm oil fuel ash as a geopolymer material. This work presents a study of the compressive strength of geopolymer mortar containing ground palm oil fuel ash. Geopolymer mortar with constant liquid to palm oil fuel ash ratio and similar flow were used for the tests. Effects of temperature, delay time of curing, concentration of sodium hydroxide and sodium silicate to sodium hydroxide ratio on compressive strength were investigated. Test results indicate that, the workable flow of geopolymer mortar was in the range of 108–115% and was dependent on the ratio by mass of sodium silicate to NaOH and the concentration of NaOH. Extra water was used to improve the workability. The geopolymer mortars palm oil fuel ash good strengths was obtained with concentration of NaOH of 15M (15Molar, 15M) with the sodium silicate to NaOH ratio by weight of 2.5. The use of palm oil fuel ash produces geopolymer mixes with good strength were obtained with the delay time before subjecting the sample to heat was 1 h (Delay time) and the optimum curing temperature in the oven was 75 C with the curing duration of 1 day.
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The published articles are copyright of the Engineering Journal of Research and Development, The Engineering Institute of Thailand Under H.M. The King's Patronage (EIT).
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