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http://dx.doi.org/10.4334/JKCI.2009.21.5.573

Fiber Distribution Characteristics and Flexural Performance of Extruded ECC Panel  

Lee, Bang-Yeon (Dept. of Civil and Environmental Engineering, Korea Advanced lnstitute of Science and Technology)
Han, Byung-Chan (AMS Engineering)
Cho, Chang-Geun (School of Architecture, Chosun University)
Kwon, Young-Jin (AMS Engineering)
Kim, Yun-Yong (Dept. of Civil Engineering, Chungnam National University)
Publication Information
Journal of the Korea Concrete Institute / v.21, no.5, 2009 , pp. 573-580 More about this Journal
Abstract
This paper presents the mix composition, production method, and curing condition applied to the extruded ECC(Engineered Cementitious Composite) panel which are able to exhibit multiple cracking and potential pseudo strain-hardening behavior. In addition to the production technique of extruded ECC panel, the effect of fiber distribution characteristics, which are uniquely created by applying extrusion process, on the flexural behavior of the panel is also focussed. In order to demonstrate fiber distribution, a series of experiments and analyses, including image processing/analysis and micro-mechanical analysis, was performed. The optimum mix composition of extruded ECC panel was determined in terms of water matrix ratio, the amount of cement, ECC powder, and silica powder. It was found that flexural behavior of extruded ECC panel was highly affected by the slight difference in mix composition of ECC panel. This is mainly because the difference in mix composition results in the change of micro-mechanical properties as well as fiber distribution characteristics, represented by fiber dispersion and orientation. In terms of the average fiber orientation, the fiber distribution was found to be similar to the assumption of two dimensional random distribution, irrespective of mix composition. In contrast, the probability density function for fiber orientation was measured to be quite different depending on the mix composition.
Keywords
extruded ECC panel; flexural performance; image processing; fiber distribution;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
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