수용성 고무 아스팔트 방수재의 교량 교면용 도막방수재 적용을 위한 인장성능 개선 기초 연구

This study aims to enhance the tensile performance of a water-based rubber asphalt membrane, originally designed for building structures, to make it suitable for waterproofing bridge decks. The characteristics and quality standards for this membrane in both building and civil engineering applications were examined. Various additives, including silica, polypropylene (PP) fiber, styrene-butadiene-styrene (SBS), and ethylene-vinyl acetate (EVA), were tested individually and in combinations to assess their effects on material properties. Test results showed that tensile strength needed to increase from 0.35 N/mm² to at least 1.5 N/mm², an improvement of about 430 percent, while maintaining elongation above 100 percent to meet quality standards. The best-performing formulations included silica 1.5 percent, PP fiber 0.3 percent, SBS 1.0 percent, EVA 1.0 percent, or silica 1.5 percent, PP fiber 0.6 percent, SBS 1.0 percent, EVA 2.0 percent. These mixtures met quality requirements and demonstrated strong mechanical performance. The findings offer a valuable reference for developing and applying waterproofing membranes for bridge decks in civil engineering.