高铝水泥改性氯氧镁胶凝材料高温下的力学性能试验研究  

Experimental study on mechanical properties of aluminum modified magnesium oxychloride cementitious material under high temperature

作　　者：韩春雷[1] 陈忠范[1] 

机构地区：[1]东南大学混凝土与预应力混凝土教育部重点实验室,江苏南京210096

出　　处：《混凝土》2009年第2期90-93,共4页Concrete

基　　金：国家自然科学基金资助项目(50578039)

摘　　要：纤维片材加固混凝土构件用的环氧类胶在70℃左右即失效,氯氧镁胶凝材料具有一定的耐高温性能,但是在高温下其力学性能特别是抗折性能损失较大,为了进一步提高氯氧镁胶凝材料在高温下的力学性能,通过对比试验研究了不同掺高铝水泥量对氯氧镁胶凝材料在常温和高温后抗压和抗折强度的影响,寻求改善氯氧镁胶凝材料在高温下的力学性能及掺和高铝水泥的最佳掺量。试验结果表明,高铝水泥是一种理想的添加剂,能够有效的提高氯氧镁胶凝材料在高温下的力学性能。Epoxy adhesive of reinforced concrete structures with fiber sheets is failure about 70 ℃ ,magnesium oxychloride cementitious material has certain mechanical performance under high temperature,but bending properties large losses under high temperature;In order to improve the mechanical properties of magnesium oxychloride cemantitious materials under high temperature,the compressive and flexural strength of different pairs of aluminum.doped magnesium oxychlofide cemantitious material at room temperature and high temperature are studied, seeking improvrnant on the mechanical properties of magnesium oxychloridc cementitious material under high temperature and the best aluminum adrnixturc content.The results show that high-alumina cement is an additive to enhance effective magnesium oxychloride cementitious material mechanical properties under high temperature.

关 键 词：高铝水泥 氯氧镁胶凝材料 常温 高温 力学性能 

分 类 号：TU528.01[建筑科学—建筑技术科学]