논문 상세보기
pp.1-9
PURPOSES: In order to evaluate a crack resistance at cold joint, sealing tape was adopted to apply at cold joint instead of typical tack coat material(RSC-4). The sealing tape was made by hot sealing material. The crack resistance as function of environmental and traffic loading was measured with visual observation.
METHODS : In this study, the crack resistance was evaluated as function of environmental and traffic loading. The freeze-thaw method was adopted for environmental loading of asphalt pavement. condition. The damage of cold joint under freeze-thaw action is initiated by ice expansion load and accelerated by the interfacial damage between new and old asphalt pavement. The traffic loading was applied with wheel tracking machine on the cold joint area of the asphalt pavement for 3 hours at 25℃. The evaluation of crack resistance was measured with visual observation. The freeze-thaw results shows that the sealing tape was significantly increased the crack resistance based on.
RESULTS : To estimate the crack resistance at cold joint area due to the environmental loading, the Freeze-thaw test was conducted by exposing the product to freezing temperature(approximately -18℃) for 24 hours, and then allowing it to thaw at 60℃ for 24 hours. The tack coat material(RSC-4) was debonded after 21 cycles of the Freeze-thaw test. The first crack was observed after 14 freeze-thaw cycle with RSC-4 material. But, the sealing tape was not debonded after 24 cycle test. Also, the sealing tape shows the better performance of the crack resistance under the traffic loading with wheel track test. The crack was generated the under traffic loading with RSC-4(tack coating), however, the crack was not shown with sealing tape. It indicates that the sealing tape has a strong resistance of tensile stress due to traffic loading. CONCLUSIONS: Based on limited laboratory test result, a performance of crack resistance using the sealing tape is better than that of general tack coat material(RSC-4). It means that the sealing tape is possible to extend a pavement service life because the crack, one of the main pavement distresses, will be delayed. Keywords Sealing Tape, Crack Resistance, Freeze-Thaw, Tensile Adhesion
1. 서론
2. 시공조인트 저감을 위한 문헌고찰
3. 연구방법
3.1. 사용 재료
3.2. 공시체 제작
3.3. 실험방법
3.3.1. 실링테이프 재료적인 특성 실험
3.3.2. 동결융해 실험
3.3.3. 윤하중 실험
4. 실험 결과
4.1. 실링 재료의 기초 물성 측정 결과
4.2. Freezing Thaw Results
4.3. Wheel Tracking Test
5. 결론 및 향후 연구 방향
감사의 글
REFERENCES
