摘要
研究了5℃、20℃和40℃养护下矿渣硫铝酸盐水泥的强度发展、水化放热、干燥收缩、水化产物及孔结构演变。结果表明,不同于硅酸盐水泥,矿渣硫铝酸盐水泥早期水化生成较多钙矾石,但累计放热量较低。养护温度越高,矿渣硫铝酸盐水泥石的早期力学强度越高;但20℃下后期抗压强度显著提升,远超过其他温度。相应的,源自小孔内水分蒸发产生的较大孔壁压力,20℃下水泥石表现出最显著的收缩行为。
The compressive strength development,hydration exothermic,drying shrinkage,hydration products and pore structure of slag-calcium sulfoaluminate cement at different temperature(5℃,20℃and 40℃)were investigated.The results indicate that,different from Portland cement,the hydration of slag-calcium sulfoaluminate cement accompanies with more ettringite at early hydration stage,but the cumulative heat is lower.Elevated curing temperature results in a higher mechanical strength,but the later compressive strength is significantly higher at 20℃,far exceeding that cured at other temperatures.Correspondingly,the cement paste exhibits the most significant shrinkage at 20℃,which results from the greater pore wall pressure generated by the evaporation of water from the small pores.
作者
徐玲琳
欧阳军
杨肯
徐名凤
周健
XU Linglin;OUYANG Jun;YANG Ken;XU Mingfeng;ZHOU Jian(Key Laboratory of Advanced Civil Engineering Materials Of Ministry Of Education,Shanghai 201804,China;School of Materials Science and Engineering,Tongji University,Shanghai 201804,China;School of Civil and Transportation Engineering,Hebei University of Technology,Tianjin 300401,China)
出处
《材料导报》
CSCD
北大核心
2023年第11期88-92,共5页
Materials Reports
关键词
矿渣硫铝酸盐水泥
养护温度
水化机理
孔结构
slag-calcium sulfoaluminate cement
curing temperature
hydration mechanisms
pore structure
