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°íÀ¯µ¿ ÀϹݰµµ ÄÜÅ©¸®Æ®ÀÇ ¿äº¯¼º ºÎ¿©¿¡ µû¸¥ °ÅǪÁý ´©Ãâ Àú°¨ ¼º´É ºÐ¼® / Assessment of Formwork-Seepage Minimization in High Fluidity, Normal Strength Concrete Utilizing Thixotropic Properties |
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±è¿µ±â(Kim, Young-Ki) ; ÀÌÀ¯Á¤(Lee, Yu-Jeong) ; ±èÀÎÅÂ(Kim, In-Tae) ; Çѵ¿¿±(Han, Dong-Yeop) |
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Çѱ¹°ÇÃà½Ã°øÇÐȸ ³í¹®Áý, Vol.23 No.4 (2023-08) |
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½ÃÀÛÆäÀÌÁö(337) ÃÑÆäÀÌÁö(12) |
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°íÀ¯µ¿ ÄÜÅ©¸®Æ®; ¿äº¯¼º; Æú¸®ºñ´Ò ¾ËÄÚ¿Ã; ºØ»ç; °ÅǪÁý Æ´»õ ´©Ãâ ; high fluidity concrete; thixotropy; polyvinyl alcohol; borax; formwork leakage |
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The central objective of this study is to curtail the leakage of mortar or cement paste, often resultant ofill-constructed formwork, by implementing thixotropy in the formulation of high-fluidity, standardstrengthconcrete. When such concrete is utilized in smaller scale construction projects, instances offormwork gaps due to suboptimal construction precision may lead to significant leakage of mortar andpaste, a problem not typically encountered with traditional slump-flow concrete. In this investigation,Polyvinyl Alcohol(PVA) and borax are incorporated into the concrete mixture to induce thixotropy. The experimental design includes varying methodologies for integrating PVA and borax, whileassessing alterations in diverse concrete performances, including thixotropy and leakage reductionpotential that simulates formwork gap conditions. Under the experimental conditions defined withinthis study, it was found that replacing, rather than merely adding PVA and borax, aids in averting wateraddition via suspensions. This approach yielded promising results in terms of concrete properties andproved efficacious in stemming leakage in concrete possessing sufficient thixotropy. Notably, when a6% PVA suspension was substituted, a significant reduction in leakage was observed. Consequently, itis projected that construction quality can be ensured, even with lower precision formwork, by applyingthixotropy to concrete through the use of PVA and borax. |