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http://dx.doi.org/10.4334/JKCI.2007.19.6.707

Effect of Micro-Cracks on Chloride Ions Penetration of Concrete II: Examination of Critical Crack Width  

Yoon, In-Seok (Faculty of Civil Engineering and Geoscience, TU Delft, The Netherlands / Waterproof Repair Rehabilitation Center, Korea Institute of Construction Materials)
Publication Information
Journal of the Korea Concrete Institute / v.19, no.6, 2007 , pp. 707-715 More about this Journal
Abstract
The vulnerability of concrete to its environment is significantly dependent on the fact that concrete is a porous material. For well-consolidated and well-cured concrete, its service life is a very long and an entrance of aggressive substance might be only pores. However, for cracked concrete, cracks should be preferential channel for the penetration of aggressive substance such as chloride ions. The effect of crack on chloride penetration depends on its size for example, crack width and crack depth. The purpose of this study is examining the effect of crack width and crack depth on chloride penetration. In order to visualize chloride penetration via cracks, RCM (rapid chloride migration) testing is accomplished. Crack width is examined using an optical microscope and CMOD value is used to estimate average crack width. From the examination on the trend of chloride diffusion coefficients of concrete specimens with various crack widths, a critical crack width and a critical crack depth are found out.
Keywords
chlorides penetration; micro-crack; critical crack width; crack depth;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
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