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。
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.
出处
《新型建筑材料》
北大核心
2017年第4期22-26,共5页
New Building Materials
基金
国家自然科学基金项目(51608402)
湖北省自然科学基金项目(2015CFB353)
湖北省教育厅科研计划项目(Q20141102)
关键词
硫铝酸盐水泥
矿渣
温度
钙矾石
电阻率
sulphoaluminate cement, slag, temperature, ettringite, electrical resistivity
