Effect of calcium-rich compounds on setting time and strength development of alkali-activated fly ash cured at ambient temperature
作者： Prinya Chindaprasirt , Tanakorn Phoo-ngernkham , Sakonwan Hanjitsuwan , Suksun Horpibulsuk , Anurat Poowancum
DOI: 10.1016/J.CSCM.2018.E00198
关键词: Calcium hydroxide 、 Fly ash 、 Hydroxide 、 Sodium 、 Compressive strength 、 Nuclear chemistry 、 Sodium hydroxide 、 Portland cement 、 Calcium oxide 、 Chemistry
摘要: Abstract This paper investigates the effect of calcium-rich compounds on setting time and compressive strength development alkali-activated fly ash (FA) pastes. Three viz., Portland cement (PC), calcium hydroxide (CH) oxide (CaO) were used as additives to replace FA at dosages 5, 10, 15% by weight basis. Sodium sodium silicate solutions alkali activator liquids in all mixtures. Alkali liquid/solid binder (FA compound) ratio 0.60, silicate-to-sodium 2.0 curing ambient temperature (25 °C) for mixes. Test results showed that depended type content compound. The incorporation three resulted acceleration time. Alkali-activated with CH PC could improve development; however, use CaO reduction. 28-day strengths 5%, 10% met requirement repair material specified ASTM standard. can thus be an alternative binding material.
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