不同温度下矿渣对硫铝酸盐水泥水化的影响

关键字：硫铝酸盐水泥,矿渣,温度,钙矾石,电阻率

（武汉科技大学 城市建设学院，湖北 武汉  430065）
 

    摘要：研究了温度分别为30 ℃和50 ℃时，掺入矿渣对硫铝酸盐水泥凝结时间、抗压强度、化学收缩、电阻率和水化产物的影响规律。结果表明，当温度为30 ℃时，掺入矿渣后水泥浆体的凝结时间明显缩短，化学收缩和电阻率均明显减小，当矿渣掺量为10%时，水泥浆体的3 d和28 d抗压强度基本没有降低；当温度为50 ℃时，水泥浆体的凝结时间比30 ℃时显著缩短，化学收缩减小，矿渣掺量为10%的水泥浆体和空白组的28 d抗压强度均明显降低，其28 d龄期时的钙矾石生成量比3 d龄期时明显减少。
    关键词：硫铝酸盐水泥；矿渣；温度；钙矾石；电阻率
    中图分类号：TU528         文献标志码：A        文章编号：1001-702X（2017）04-0022-05

Influence of slag on the hydration of sulphoaluminate cement under different temperatures
LIU Gang，LIAO Yishun，CHENG Yi，LI Shuangquan
（School of Urban Construction，Wuhan University of Science and Technology，Wuhan 430065，China）

    Abstract：The influence law of slag on the setting time，compressive strength，chemical shrinkage，electrical resistivity and hydration products of sulphoaluminate cement under the temperatures of 30 ℃ and 50 ℃ were investigated respectively. The results showed that when the temperature was 30 ℃，the setting time of cement paste was shorten obviously with slag，the value of the chemical shrinkage and the electrical resistivity also decreased obviously. When the content of slag was 10%，the compressive strength of cement paste of 3 d and 28 d remained unchanged roughly. When the temperature was 50 ℃，the setting time of cement paste was obviously less than that under 30 ℃，the value of chemical shrinkage decreased，the compressive strength of cement paste of control group of 28 d decreased obviously，and the strength of cement paste of 28 d when the dosage of slag was 10% also decreased obviously，the amount of ettringite after 28 d of hydration was obviously less than that of 3 d.
    Key words：sulphoaluminate cement，slag，temperature，ettringite，electrical resistivity