EXPERIMENTAL STUDY ON THE EFFECTS OF DAMAGE ON THE CHLORIDION PERMEABILITY OF CONCRETE

摘要：

Micro-crack in concrete can affect the permeability of concrete in a certain extent.This paper focuses on the effect of micro-crack on the Chloridion permeability of concrete. Inthe paper,the split tests for two different concrete specimen and the Chloridion permeabletests for cracked concrete specimen are carried out. Damage with different crack width CODis acquired by split tests,and the relationship between crack width and Chloridion diffusioncoefficient D is studied. The test results show that strength of cement paste,sort and grate ofaggregate have significant impacts on the cracking of concrete; the residual displacementCODr within 25 microns show little effect on concrete Chloridion permeability; the rate β ofdiffusion coefficient changes rises with the increase of the residual displacement CODr. Theconclusions are valuable to evaluate permeability of existing concrete structures.

关键词： permeability split residual displacement diffusion coefficient of Cl

作者: Yan Liu Cheng Yi Tingting Guo Zuochao Dong

作者单位: Laboratory of Coal Resources and Mine Safety,China University of Mining and Technology,Beijing,10008 Laboratory of Coal Resources and Mine Safety,China University of Mining and Technology,Beijing,10008

会议类型: 国际会议

会议名称: The International Conference on Durability of Concrete Structures(2008年混凝土结构耐久性国际学术会议)

会议地点: 杭州

会议语种:英文

页码: 313-319

在线出版日期: 2008-11-01（万方平台首次上网日期，不代表论文的发表时间）