Microstructure of composite cements containing blast-furnace slag and silica nano-particles subjected to elevated thermally treatment temperature
作者： Mohamed Heikal , O.K. Al-Duaij , N.S. Ibrahim
DOI: 10.1016/J.CONBUILDMAT.2015.05.042
关键词: Microstructure 、 Ground granulated blast-furnace slag 、 Composite number 、 Thermal treatment 、 Slag 、 Composite material 、 Materials science 、 Cement 、 Porosity 、 Compressive strength
摘要: Abstract This paper aims to study the effect of thermally treatment temperatures on composite cements containing nano-silica (NS) and blast-furnace slag (GBFS). The are composed NS from 0, 1 4 mass% GBFS 25, 50 65 mass%. thermal resistance cement pastes was studied after specimens subjected at 200, 400, 650, 850 950 °C, with rate heating 5 °C/min for 2 h soaking time. compressive strength, apparent density total porosity were determined. Substitution OPC 25–50% in presence silica-nano-particles improves fire up 650 °C. relative strength unsuperplasticized mixes 65 mass% (M25, M50 M65 mixes) 101.34–109.76%, 113.67–120.98%, 79.55–96.67%, 37.06–41.47% 12.35–23.08%, whereas superplasticized M25S, M50S M65S 109.71–149.02%, 116.71–153.92%, 104.23–143.13%, 77.35–95.40% 24.47–38.24% samples treated 950 °C. It can be concluded that made 50 mass% have higher
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