磷酸镁水泥耐水性的影响因素与改进措施  

Influencing Factors on Water Resistance of Magnesium Phosphate Cement and Its Improving Measures

作　　者：毛敏[1] 王智[1] 王庆珍[2] 胡倩文[1] 尤超[2] 

机构地区：[1]重庆大学化学化工学院,重庆400044 [2]重庆大学材料科学与工程学院,重庆400045

出　　处：《粉煤灰综合利用》2011年第6期15-18,共4页Fly Ash Comprehensive Utilization

基　　金：重庆市科技攻关计划重点项目(CSTC2009AB4227)

摘　　要：镁水泥(MPC)是一种新型的早强快硬胶凝材料,可作为修补材料应用于工程修补。从磷酸镁水泥的水化机理出发,讨论磷酸镁水泥主要水化产物鸟粪石(MgNH4PO4.6H2O)的性质、形成及影响因素,及其与磷酸镁水泥耐水性的关系。从理论上提出了通过选择合适活性、粒度和低CaO含量的原材料、优化配合比、控制体系pH值和掺加粉煤灰等措施改善磷酸镁水泥的耐水性。Magnesium phosphate cement（MPC） is a new rapid hardening cementitious material with high early strength,which can be used as patching material in concrete repair works.Based on the hydration mechanism of MPC,we discnssem the properties,formation and influencing factors of main which is the maih hydration product of MPC,struvite（MgNH4PO4o6H2O）,and the relationship between the struvite and water resistance of MPC was analyzed as well.For improving the water resistance of MPC,several methods,such as selecting proper raw materials with suitable activity and granularity and lower CaO content,optimizing the proportion,controlling the pH of mixture,and incorporating fly ash,have been proposed theretically.

关 键 词：酸镁水泥 鸟粪石 耐水性 水化机理 

分 类 号：TQ172.729.9[化学工程—水泥工业]