Effect of nano-silica on strength and durability of fly ash based geopolymer mortar
作者： D. Adak , M. Sarkar , S. Mandal
DOI: 10.1016/J.CONBUILDMAT.2014.07.093
关键词: Materials science 、 Nano- 、 Composite material 、 Molar concentration 、 Fly ash 、 Mortar 、 Flexural strength 、 Ultimate tensile strength 、 Absorption of water 、 Curing (chemistry)
摘要: Abstract In general, the fly ash based geopolymer concrete/mortar needs heat activation for early strength developments depending on molar concentration of activator. To overcome above shortcomings, an experimental program has been taken up low calcium mortar having three concentrations (8 M, 10 M and 12 M) activator liquids along with different percentage nano silica addition (0%, 4%, 6%, 8% 10% ash). Geopolymer 6% shows appreciable improvement in compressive, flexural tensile at 28 days under ambient temperature curing. The water absorption charge passed RCPT are also seemed to be comparatively less modified mortar. Such is due transformation amorphous compound crystalline as noted XRD FESEM analysis.
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