酸雨对再生骨料混凝土实心砖砌体抗压性能影响试验研究  

EXPERIMENTAL STUDY ON THE INFLUENCE OF ACID RAIN ON THE COMPRESSIVE BEHAVIORS OF RECYCLED AGGREGATE CONCRETE SOLID BRICK MASONRY

作　　者：郑山锁[1] 程明超[1] 宋哲盟 马德龙[1] 

机构地区：[1]西安建筑科技大学土木工程学院,陕西西安710055

出　　处：《工程力学》2017年第2期94-101,共8页Engineering Mechanics

基　　金：国家科技支撑计划项目(2013BAJ08B03);教育部高等学校博士学科点专项科研基金项目(20136120110003);陕西省科研项目(2013JC16)

摘　　要：为了研究酸雨腐蚀对再生骨料砖混凝土实心砖砌体抗压性能的影响,该文以32榀相同特性的再生骨料混凝土实心砖砌体抗压试件为研究对象,利用国内先进的人工模拟大气环境实验室,对其进行喷淋-光照循环加速腐蚀试验及轴心抗压试验,对比分析了试件抗压强度、破坏形态、弹性模量和应力-应变关系随腐蚀循环次数的变化。试验结果表明:经酸雨腐蚀后的再生骨料混凝土实心砖砌体开裂荷载较小,裂缝出现较早,破坏相对严重;随着腐蚀次数的增加,应力-应变曲线斜率逐渐减小,弹性模量逐渐降低,抗压强度呈先升后降的趋势。经300次酸雨腐蚀,抗压强度下降29%,弹性模量下降42%。In order to study the effect of acid rain on the compressive behaviors of recycled aggregate concrete solid brick masonry, this paper conducted the spray-light cycle accelerated corrosion test and the axial compression test for 32 identical specimens in artificial atmosphere environment. The compressive strength, damage mode, elastic modulus and stress-strain curves were analyzed with the increase of the number of spray-light cycle. The results indicate that the specimens after acid rain corrosion are associated with smaller cracking load, earlier initiation of cracking, and more severe damage. The slope of stress-strain curve and elastic modulus gradually decrease with the increase of spray-light cycles, while the compressive strength increases at the early stage before the decreasing at the latter stage. After 300 spray-light cycles, the compressive strength decreases by 29% and the elastic modulus decreases by 42%.

关 键 词：再生骨料混凝土实心砖砌体 酸雨腐蚀 抗压强度 弹性模量 应力-应变曲线 

分 类 号：TU522.3[建筑科学—建筑技术科学]