Analysis of Changes in Physical Properties according to the Content of Recycled Butyl Rubber of Self-adhesive Waterproofing Sheets in a Chemically Deteriorated Environment-Focused on Adhesion Performance-

This study analyzes the performance change characteristics (deterioration characteristics) of the self-adhesive waterproofing sheet when exposed to a chemical deteriorated Environment according to the content of recycled butyl rubber, focusing on the adhesive strength (with CRC board surface & between sheet joint). This study was conducted to prepare a database that can be applied to the formulation design for As a result of the study, it was confirmed that the performance degradation occurs relatively large when exposed to an acid environment among chemical degradation environments. Accordingly, the recycled butyl rubber content must be limited to 44% to achieve similar performance to the recycled butyl rubber content of 67% of the untreated test sample. confirmed to be obtainable. Based on the above results, it was suggested that the appropriate mixing range of recycled butyl rubber considering the performance degradation after field application when manufacturing the self-adhesive waterproofing sheet is up to 44% compared to the total rubber content.