不同温度下矿物掺合料对硫铝酸盐水泥水化的影

关键字：硫铝酸盐水泥；硅灰；矿渣；养护温度；抗压强

（武汉科技大学 城市建设学院，湖北 武汉  430065）

    摘要：研究了20 ℃、35 ℃、50 ℃养护条件下硅灰和矿粉对硫铝酸盐水泥水化的影响,分析了抗压强度、孔溶液pH值和水化产物的变化规律。结果表明：随着养护温度的升高，掺矿粉和硅灰的硫铝酸盐水泥抗压强度提高，但50 ℃养护条件下纯硫铝酸盐水泥浆体在28 d的抗压强度有明显倒缩现象，是由于高温下水化产物分解所致；掺入硅灰可以有效改善硫铝酸盐水泥后期抗压强度倒缩问题，掺入矿粉由于其细度和活性的限制改善能力有限。

    关键词：硫铝酸盐水泥；硅灰；矿渣；养护温度；抗压强度

    中图分类号：TU528.041        文献标识码：A        文章编号：1001-702X（2018）05-0084-04

 

Effect of curing temperature on the hydration of calcium sulphoaluminate cement blended with mineral admixtures

XU Lu，LIAO Guosheng，LIAO Yishun

（School of Urban Construction，Wuhan University of Science and Technology，Wuhan 430065，China）

   Abstract：The effect of temperature on the hydration of calcium sulphoaluminate cement blended with silica fume and slag were investigated when the temperature is 20 ℃，35 ℃，50 ℃，and the change law of compressive strength，pH value of pore solution and the hydration product was analyzed. The results indicate that the compressive strength of sulphoaluminate cement blended with silica fume and slag increases with the rise of the curing temperature but the compressive strength of control sample is obviously reduced due to the decomposition of hydration products at 50 ℃. Silica fume can effectively improve the compressive strength shrinkage of sulphoaluminate cement at later stage，and the ability of slag to improve the compressive strength is limited due to its fitness and activity.

    Key words：calcium sulphoaluminate cement，silica fume，slag，curing temperature，compressive strength