细骨料携带氯离子的砂浆强度和粘结力长期暴露试验研究  

LONG-TERM EXPOSURE EXPERIMENTAL INVESTIGATION ON MORTAR STRENGTH AND ITS BOND PERFORMANCE WITH CHLORIDE ION PERMEATING IN SANDS

作　　者：张小刚[1] 王卫仑[1] 王娇[1] 杨瑞[1] 

机构地区：[1]深圳大学土木工程学院,深圳市土木工程耐久性重点实验室,广东深圳518060

出　　处：《工业建筑》2011年第5期1-5,共5页Industrial Construction

基　　金：国家自然科学基金项目(50908148);住房与城乡建设部研究开发项目(2009-K4-23,2010-11-33)

摘　　要：首先研究了细骨料携带不同质量分数氯离子的砂浆试件在3,5,7,14,28,90 d的抗折、抗压强度的变化规律,发现与拌制用水中携带氯离子具有早强作用不同,细骨料携带氯离子不但不会引起早强,反而会降低强度。基于4年的长期暴露试验,系统研究细骨料携带不同质量分数氯离子的砂浆试件在270,360,450,630,810,1 050,1 170,1 320,1 440 d时的τ-s滑移全曲线,分析最大粘结应力、延性等粘结性能随腐蚀时间及不同氯离子质量分数的时变规律,最后通过origin软件得到了τ-s拟合公式。Firstly,the compressive and flexural strength of mortar with chloride ion permeating in sands during mixing investigated in 3,5,7,14,28,and 90 d.It is found that chloride ion permeating in sands will not improve the mortar strength of early stage,but reduce the corresponding strength,which is obviously different from the effect of chloride ion permeating in water.Then the bond performance of above mortar in 270,360,450,630,810,1 050,1 170,1 320,and 1 440 d was studied based on 4 years long-term exposure experiments.The τ-s slipping curve with different content of chloride ion,the time-variant maximal bonding strength,also its tensility change rule are presented.Finally,the fitting formula of τ-s was gained by origin software.

关 键 词：细骨料携带氯离子 长期暴露试验 抗压抗折强度 粘结性能 氯离子含量 

分 类 号：TU528.041[建筑科学—建筑技术科学]