Compressive Strength and Water Absorption of Geopolymer from Palm Oil Fuel Ash Containing Alumina Powder
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Abstract
In this study, the compressive strength of palm oil fuel ash (POFA) based geopolymer mortars was studied. The geopolymer mortars were prepared using mixtures of POFA and alumina powder (AP). The alkaline activator was prepared from sodium silicate (Na2SiO3) and sodium hydroxide (NaOH). The geopolymer mortar mixtures were prepared with POFA to AP ratios 100:0, 95:5, 90:10, and 85:15 by weight, and varied different binder (POFA+AP) to the alkaline activator and binder to fine aggregate. The samples were cured at a temperature of 80⸰C for 24 hours, and compressive strength test were conducted at ambient temperature at 1, 7, and 28 days. The test results showed that the compressive strength of POFA based geopolymer mortar improved significantly when the source materials was substituted with AP. The evidence of compressive strength in this study that the geopolymer with
10% AP, 3.00 of fine aggregate, and 1.44 of alkaline activator gave the highest compressive strength, and the lowest bulk density.
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ลิขสิทธ์ ของมหาวิทยาลัยเทคโนโลยีราชมงคลพระนครReferences
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