摘要
本文采用无电极电阻率测量仪系统研究了氯氧镁水泥早期水化行为,测定了不同原料以及掺合料氯氧镁水泥水化电阻率-时间曲线,测试了1d抗弯拉与抗压强度.试验结果表明:电阻率曲线发展特性能够表征氯氧镁水泥早期水化行为;根据电阻率曲线规律及其微分曲线特征点,氯氧镁水泥早期水化过程分为四个阶段:溶解期,诱导期,加速期,减速期;采用轻烧白云石粉作为氯氧镁水泥主要原料会大幅度降低氯氧镁水泥水化速度和早期强度;粉煤灰掺入延缓了氯氧镁水泥水化各阶段的反应速率,延长了氯氧镁水泥的诱导期和加速期,降低了氯氧镁水泥早期强度.
Early hydration process of magnesium oxychloride cement was studied on the electrical resistivity method. The electrical resistivity and 1 d strength was tested. The results showed that the process of hydrating magnesium oxychloride cement can be characterized by electrical resistivity curve. The electrical resistivity curve was identified to divide the hydration process into four periods： dissolution, induction, acceleration, and deceleration. The sample of the light burned dolomite powder hydration rate and early strength is much lower than the sample of the light burned magnesite powder. Fly ash delayed reaction rate of magnesium oxychloride cement, extended the setting and acceleration period, and reduced early strength.
出处
《西安建筑科技大学学报（自然科学版）》
CSCD
北大核心
2015年第3期453-457,共5页
Journal of Xi'an University of Architecture & Technology(Natural Science Edition)
基金
国家自然科学基金项目(51308062)
中国博士后科学基金项目(2013M540726)
中央高校基本科研业务资金资助(2014G1311084)
青海省科技计划项目(2014-GX-A2A)
陕西省博士后基金资助
青海省交通科技项目(2013-04)
关键词
氯氧镁水泥
电阻率法
早期水化
Magnesium oxychloride cement
Electrical resistivity method
Hydration process
