轻烧氧化镁反应活性对水泥石变形敏感性的影响  

Influence of Caustic Calcined Magnesia Reactivity on the Deformation Sensitivity of Cement Stone

作　　者：娄燕 张守治[1,2] LOU Yan;ZHANG Shouzhi(Jiangsu Sobute New Materials Co.,Ltd.;JZhenjiang Sobute New Materials Co.,Ltd.)

机构地区：[1]江苏苏博特新材料股份有限公司 [2]镇江苏博特新材料有限公司

出　　处：《广东建材》2024年第9期85-88,共4页Guangdong Building Materials

基　　金：国家重点研发计划子课题2021YFB3703704-02(2)桥梁墩台塔柱混凝土用基体减缩材料研究。

摘　　要：本文以两种水化反应活性的轻烧氧化镁为研究对象,系统研究了掺两种不同活性氧化镁的水泥石在不同养护湿度和养护温度下变形的湿度敏感性和温度敏感性规律,以期为轻烧氧化镁在实际工程应用中水化活性的选择提供参考依据。结果表明:活性反应时间短、水化活性高轻烧氧化镁M75在水泥石中膨胀变形的湿度敏感性相对较大、温度敏感性较小;活性反应时间长、水化活性低的轻烧氧化镁M190在水泥石中膨胀变形的湿度敏感性相对较小、温度敏感性较大。This paper takes two types of caustic calcined magnesia with different hydration reactiv‐ity as the research object,and systematically studies the humidity sensitivity and temperature sensi‐tivity of cement stone mixed with two different activated MgO under different curing humidity and cur‐ing temperature,in order to provide reference for the selection of hydration activity of caustic cal‐cined magnesia in practical engineering applications.Theresults show that the humidity sensitivity of caustic calcined magnesia M75 with short reaction time and high hydration activity to expansion defor‐mation in cement stone is relatively high,while the temperature sensitivity is relatively low;The hu‐midity sensitivity of caustic calcined magnesia M190,which has a long reaction time and low hydration activity,to expansion deformation in cement stone is relatively low,while the temperature sensitivity is relatively high.

关 键 词：氧化镁活性 水泥石 湿度敏感性 温度敏感性 

分 类 号：TU528[建筑科学—建筑技术科学]