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Geopolymer is made from silica and alumina source materialsactivated with high alkali solutions such as sodium hydroxide(NaOH), potassium hydroxide (KOH), sodium silicate and potassiumsilicate [1]. A number of supplementary cementitious materialssuch as ground granulated blast furnace slag, metakaolin andfly ash are commonly used source materials in geopolymer fortheir availability and favorable mechanical properties [2–6].Several researchers [7–10] reported that high calcium fly ash isalso a suitable source material for making good geopolymer. Thehigh calcium fly ash geopolymer mixture can be cured at roomtemperature as a result of the reaction of calcium in the system.
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