摘要
为研究大气盐雾环境中C l-和CO2作用下受弯钢筋混凝土梁的耐久性,设计制作了一组普通钢筋混凝土梁试件,结合加速腐蚀,对这组梁的裂缝、挠度和承载能力作了分析。结果表明:氯离子和CO2共同腐蚀持续荷载作用下,随着碳化的深入、时间的增长,梁腐蚀速度加快,裂缝急剧增长;梁的挠度随钢筋锈蚀发展而增加,在锈蚀的早期挠度增长较大,随着锈蚀的发展,挠度增长趋于平稳;梁的劣化随荷载的增加,劣化速度加快。
In order to study the influence o f chloride ions and CO2 on concrete beam durability in salt spray environment,a set of reinforced concrete beam specimens are designed.In the condition of accelerated corrosion,the cracks,deflection and loading capacity of specimens are analyzed.The results show that in salt spray environment,with the corrosion rate increase,the cracks increase rapidly along with CO2 penetratiion into the beams.The deflection increases with corrosion development.At the beginning,the deflection increases fast,and then goes steady.Degradation of specimens speed up with the load increasing.
出处
《桂林理工大学学报》
CAS
北大核心
2010年第4期566-570,共5页
Journal of Guilin University of Technology
基金
广西科学研究与技术开发计划项目(桂科攻0992001-2)
广西自然科学基金项目(桂科基0832018)
广西建筑工程检测与试验重点实验室项目(桂科能07109005-14)
关键词
氯离子
腐蚀
碳化
钢筋混凝土梁
承载力
chloride ions
corrosion carbonation
reinforced concrete beam
loading capacity
