掺人工砂对磷酸钾镁水泥砂浆性能的影响  

The Impact on Properties of Magnesium and Potassium Phosphate Cement Mortar Mixed with Manufactured Sand

作　　者：田正宏[1,2] 高林冬[2] 卜静武 潘婧[2] 彭志海[3] 

机构地区：[1]河海大学水文水资源与水利工程科学国家重点实验室,江苏南京210098 [2]河海大学水利水电学院,江苏南京210098 [3]中国水利水电第七工程局有限公司,四川成都610081

出　　处：《水电能源科学》2014年第10期105-108,共4页Water Resources and Power

基　　金：国家自然科学基金项目(51279054)

摘　　要：磷酸钾镁水泥(MKPC)是一种基于酸碱反应而凝结硬化的新型胶凝材料,掺人工砂可改变其砂浆强度、表观特征和体积稳定性。利用不同人工砂掺量砂浆强度试验,研究了人工砂掺量对MKPC砂浆抗折性能和抗压性能的影响;运用X射线衍射物相分析方法(XRD)与电镜扫描方法(SEM)分析了MKPC砂浆表面的微观特征;利用对比试验分析了人工砂对MKPC砂浆体积稳定性影响。结果表明,人工砂掺量为50%的MKPC砂浆硬化体抗折强度、抗压强度最高;结构致密、界面结构完善;表现出微膨胀性,最大膨胀率为普通砂浆最大收缩率的1/6,体积稳定性良好。Magnesium and Potassium Phosphate cement （MKPC） is a new kind of acid-based reaction cementing material. Adding manufactured sand can change the intensity, apparent characteristics and volume stability of MKPC mortar. Experiments were conducted to test the breaking strength and compressive strength of MKPC mortar mixed with manufactured sand. Microcosmic analysis of XRD and SEM on the interface of MKPC mortar was performed as well. Contrast test was conducted to analyze the impact of manufactured sand on the volume stability of MKPC mortar. The results show that MKPC mortar mixed with 50% manufactured sand had excellent mechanical properties and the most dense structure; the maximum deformation of MKPC mortar was one sixth of that of Portland cement mortar, and the volume stability is better.

关 键 词：磷酸钾镁(MKPC) 人工砂 强度 微观结构 体积稳定性 

分 类 号：TU528[建筑科学—建筑技术科学] TQ172.18[化学工程—水泥工业]