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Title |
Reduction of Drying Shrinkage Cracking of Box Culvert for Power Transmission with Shrinkage Reducing Agent
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Authors |
우상균(Sang-Kyun Woo) ; 김기중(Ki-Jung Kim) ; 이윤(Yun Lee) |
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DOI |
http://dx.doi.org/10.11112/jksmi.2016.20.5.102 |
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Keywords |
Shrinkage reducing agent ; Box culvert ; Drying shrinkage ; Cracking ; Numerical analysis |
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Abstract |
The purpose of this study is to examine the reduction effect of shrinkage reducing agent for drying shrinkage induced cracking and suggest the method of controlling the cracking in concrete box culvert for power transmission. Based on drying shrinkage cracking mechanism, it is necessary to perform the numerical analysis, which involves shrinkage reducing effect of shrinkage reducing agent. From the numerical results, it is found that cracking behavior for longitudinal direction and transverse direction due to differential drying shrinkage of box culvert can occur and the experimental observation of concrete cracks support the numerical predictions. The shrinkage reducing agent reduced the concrete cracking by 40~50%, which shows the methodology of controlling of drying shrinkage cracks in box culverts in real construction site.
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