Effect of Low Temperature on Hydration Performance of the Complex Binder of Silica Fume-Portland Cement
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2014年第1期
论文作者：刘军 LI Yao YANG Yuanquan CUI Yunpeng
文章页码：75 - 81
摘 要：By analyzing the mechanical properties, composition of hydrates, content of Ca（OH）2 and microstructure of the complex binder of silica fume-Portland cement, which cured at constant low temperatures （+5--10 ℃）, the effect of different low temperatures on hydration performance of the complex binder at the age of 3, 7 days and 14 days was researched. Experimental results show that hydration processes of the complex binder can be restricted by low temperature. Reducing the curing temperature could cause compressive strength and flexural strength of the complex binder to decrease significantly. The gradient difference between strength diminishes, content of Ca（OH）2 in hydrates reduces, and compactness of the microstructure weakens. Therefore mixing with silica fume can modify various performance indicators of the complex blinder, but reducing the curing temperature restricts the pozzolanic activity of silicon fume.
刘军1,2,3，LI Yao1,2，YANG Yuanquan2，CUI Yunpeng2
1. Institute of Civil Engineering, Dalian University of Technology2. School of Material Science and Engineering, Shenyang Jianzhu University3. School of Material Science and Engineering, Shenyang Ligong University
摘 要：By analyzing the mechanical properties, composition of hydrates, content of Ca（OH）2 and microstructure of the complex binder of silica fume-Portland cement, which cured at constant low temperatures （+5--10 ℃）, the effect of different low temperatures on hydration performance of the complex binder at the age of 3, 7 days and 14 days was researched. Experimental results show that hydration processes of the complex binder can be restricted by low temperature. Reducing the curing temperature could cause compressive strength and flexural strength of the complex binder to decrease significantly. The gradient difference between strength diminishes, content of Ca（OH）2 in hydrates reduces, and compactness of the microstructure weakens. Therefore mixing with silica fume can modify various performance indicators of the complex blinder, but reducing the curing temperature restricts the pozzolanic activity of silicon fume.
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