吉林大学学报(工学版) ›› 2015, Vol. 45 ›› Issue (1): 112-120.doi: 10.13229/j.cnki.jdxbgxb201501017

• 论文 • 上一篇    下一篇

复合盐浸-冻融-干湿多因素作用下的混凝土腐蚀破坏

宿晓萍1，王清2   

  1. 1.长春工程学院 土木工程学院，长春 130012；
    2.吉林大学 建设工程学院，长春 130026
  • 收稿日期:2014-03-26 出版日期:2015-02-01 发布日期:2015-02-01
  • 通讯作者: 王清(1959),女,教授,博士生导师.研究方向:地质工程.E-mail:wangqing@jlu.edu.cn
  • 作者简介:宿晓萍(1971)，女，副教授，博士.研究方向:地质工程，混凝土耐久性.E-mail:sxp5400@163.com
  • 基金资助:
    国家自然科学基金项目(41372267,41430642)；国家住房与城乡建设部项目(2013-H-4)；吉林省科技厅项目(20130413055GH)；吉林省重点学科项目.

Corrosion damage of concrete under multi-salt soaking, freezing-thawing and dry-wet cycles

SU Xiao-ping1,WANG Qing2   

  1. 1.School of Civil Engineering, Changchun Institute of Technology, Changchun 130012, China;
    2.College of Construction Engineering, Jilin University, Changchun 130026, China
  • Received:2014-03-26 Online:2015-02-01 Published:2015-02-01

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摘要： 通过复合盐浸-冻融-干湿循环试验，探析了混凝土的腐蚀破坏特征、质量损失与动弹性模量衰减的规律，对破坏后混凝土内部微观结构进行电镜扫描、EDX能谱分析与化学成分测定，进而揭示混凝土腐蚀破坏的机理。研究结果表明，在多种环境因素作用下，混凝土的质量与动弹性模量的损失率均随试验循环次数的增加而呈上升趋势;混凝土的腐蚀破坏以盐类结晶膨胀作用为主，加之盐类的化学侵蚀作用，混凝土的破坏更迅速、更严重。混凝土破坏是多种有害因素作用造成的损伤累积所致。

关键词: 结构工程, 盐浸, 冻融循环, 干湿循环, 混凝土, 腐蚀破坏

Abstract: Experiments are conducted to investigate the damage feature, quality degradation and dynamic elastic modulus decay of concrete under multi-salt soaking, freezing-thawing and dry-wet cycles. Furthermore, the corrosion mechanism of concrete is revealed by electron microscope scanning, analysis of EDX spectrum and chemical composition analysis of the concrete microstructure. Results show that under the common action of multi-salt soaking, freezing-thawing and dry-wet cycles, quality degradation and dynamic elastic modulus decay tend to rise with the increase in the test cycles. The corrosion damage of concrete is mainly caused by the expansion effect of salt crystallization. Combined with the salt chemical erosion, the damage becomes faster and more serious. The total corrosion damage is the result of accumulation of damages caused by a variety of harmful factors.

Key words: structural engineering, salt soaking, freezing-thawing cycle, dry-wet cycle, concrete, corrosion damage

中图分类号: 

  • TU528
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