【摘 要】
：
In this paper, a high strength and excellent durability alkali-activated slag geopolymer cement material was synthesised using the solid sodium silicate (mo
【机 构】
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School of Chemistry and Chemical Engineering and Guangxi Key Lab of Petrochemical Resource Processin
【出 处】
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The 14th International Congress on the Chemistry of Cement (
论文部分内容阅读
In this paper, a high strength and excellent durability alkali-activated slag geopolymer cement material was synthesised using the solid sodium silicate (modulus =2.0) and slag powders.Based on previous experimet, the optimal composition was that mass ratio obtained: slag/solid sodium silicate =5:1, and the added water was 23% of the total mass of slag and solid sodium silicate.The setting time, compressive strength and conductivity after freezed at different temperature was measured from 25℃ to-25℃.The results showed that the setting time of the slag based geopolymer paste firstly increased and then decreased with the decreasing of the curing temperature.The compressive strength of the slag based geopolymer paste gradually reduced with the decreasing of the curing temperature, the 28 days compressive strength at 25℃, 10℃, 0℃,-10℃,-25℃ were 110.8 MPa, 61.9 MPa, 52.1 MPa,18.9 MPa, and 2.2 MPa, respectively.The experimental results showed the conductivity of the slag based geopolymer paste gradually dropped with the decreasing of curing temperature,which really reflected the decreased geopolymerisation trend of the slag based geopolymer.
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