磷酸镁水泥耐碱性能试验研究  

Experimental Study on the Performance of Magnesium Phosphate Cement in Alkali

作　　者：李悦[1] 施同飞 孙佳[1] 

机构地区：[1]北京工业大学城市与工程安全减灾省部共建重点实验室,北京100124

出　　处：《建筑材料学报》2015年第6期1060-1064,1083,共6页Journal of Building Materials

基　　金：北京市属高等学校高层次人才引进与培养计划项目(CIT&TCD20150310);教育部"新世纪优秀人才支持计划"项目(NCET-12-0605);固废资源化利用与节能建材国家重点实验室开放基金资助项目(SWR-2014-008)

摘　　要：研究了磷酸镁水泥在碱溶液作用下的表观现象和质量损失率,并采用XRD,SEM/EDS分析其3,28d的腐蚀产物.结果表明:磷酸镁水泥的耐碱性较差,掺入粉煤灰后耐碱性得到改善;耐碱性较差的原因是磷酸镁水泥中的六水磷酸钾镁胶体与碱溶液反应生成氢氧化镁,使磷酸镁结构疏松剥落.Superficial phenomenon and mass loss of magnesium phosphate cement（MPC）in aqueous alkali were studied.The corrosion products at 3and 28 days were detected by XRD and SEM/EDS.The experimental results show that alkaline resistance of MPC is weak,while its alkaline resistance is improved by incorporated fly ash.The exfoliation of MPC and its loose structure exhibite weak alkaline resistance of MPC,which is caused by chemical reaction（product：magnesium hydroxide）between potassium magnesium phosphate hexahydrate colloid and aqueous alkali.

关 键 词：磷酸镁水泥 耐碱性 腐蚀环境 机理 

分 类 号：TQ172.712[化学工程—水泥工业]