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Reduction of Drying Shrinkage Cracking of Box Culvert for Power Transmission with Shrinkage Reducing Agent
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수축저감제 혼입에 따른 전력구 박스구조물의 건조수축균열 저감

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Reduction of Drying Shrinkage Cracking of Box Culvert for Power Transmission with Shrinkage Reducing Agent
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The purpose of this study is to examine the reduction effect of shrinkage reducing agent for drying shrinkage induced cracking and suggestthe method of controlling the cracking in concrete box culvert for power transmission. Based on drying shrinkage cracking mechanism, it is necessaryto perform the numerical analysis, which involves shrinkage reducing effect of shrinkage reducing agent. From the numerical results, it is found thatcracking behavior for longitudinal direction and transverse direction due to differential drying shrinkage of box culvert can occur and the experimentalobservation of concrete cracks support the numerical predictions. The shrinkage reducing agent reduced the concrete cracking by 40~50%, whichshows the methodology of controlling of drying shrinkage cracks in box culverts in real construction site.

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