A Study on Trend of Tensile Properties with Ratio of Water Mixture under Low and High Temperature Environment in Hydroponic Polyurethane Waterproofing Materials

수경화성 폴리우레탄 도막재의 물 혼합비에 따른 저온 및 고온 환경에서의 인장성능 변화 추이 연구

Due to a lack of objective and adequate study on the physical effects on hydroponic polyurethane waterproofing material water mixture ratio, construction site workers are having to rely on their hands-on experience to determine a mixture ratio, resulting in difficulty of maintaining quality management. Particularly in cases of rooftop exposed type hydroponic polyurethane materials, the varying temperature conditions make it further difficult for quality management control. in this regard, this study conducts tensile strength testing and compares the tensility change rates hydroponic polyurethane waterproofing materials with various water mixture ratios ranging from 0%~50% and exposed to alternating temperature change between -20℃ to 60℃ in the span of 1 hour after curing for 14 days.