The purpose of this study is to investigate the effect of long - term deterioration factor of 12 months on 6 kinds of coating waterproofing materials (polyurethane 1, 2, acrylic rubber, polyurea, rubber asphalt, cement - As a part of the study to characterize the performance change in material aspect, the research was carried out on the tensile strength of the polyurea coating waterproofing material against the performance change in the long term exposure to the chemical erosion environment. As shown in the test results, it was mainly performed in an acidic environment, and it can be confirmed that polyurea is not resistant to acid. In the alkali and sodium chloride environment, the tensile strength after immersion for the last 12 months showed a decrease in strength within about 10% of the initial tensile strength, and it was confirmed that the resistance was excellent in an alkali environment.

Abstract
 1. 서 론
 2. 시험계획 및 방법
 3. 해석결과 및 고찰
 4. 결 론
 참고문헌

• 주희정(동명대학교 건축공학과) | Ju Hee Jeong
• 임남기(동명대학교 건축공학과) | Lim Nam Gi 교신저자