논문 상세보기
pp.19-26
PURPOSES : Korea Expressway Corporation has been working on an early remodeling project for the Jungbu Expressway to prepare methods for the rehabilitation of the old CRCP(Continuous Reinforced Concrete Pavement). In this study, the distress of the old CRCP was classified, and the engineering properties of the core specimens for each failure type were evaluated. Based on the test results, the concrete conditions of the existing CRCP were evaluated. This provides a basis for the pre-treatment or repair of the existing CRCP in the JungBu Expressway.
METHODS : To evaluate the pavement condition of the Jungbu Expressway, existing PMS(Pavement Management System) data were analyzed, and field surveys were conducted for each pavement condition. The longitudinal rebar depth, rebar spacing, horizontal crack, and pavement thickness were examined through core sampling and non-destructive testing. In addition, the core specimens were used to evaluate the compressive strength, chloride penetration test, chloride ion penetration resistance, and freeze-thaw resistance.
RESULTS : From the analysis of existing PMS data, field surveys, and laboratory tests, it was found that the old CRCP condition of the Jungbu Expressway was not good. Various types of failures occurred, and horizontal cracks at the rebar location, upward rebar locations, and rebar corrosion were confirmed. In addition, the compressive strength was considerably high, but the durability-related index was judged to be poor.
CONCLUSIONS : For the remodeling project of the Jungbu Expressway, appropriate repairs should be carried out for each type of distress in the old CRCP.
1. 서론
2. 중부선 포장상태 평가
2.1. 기존 PMS 데이터 검토
2.2. 파손상태 사전조사
3. 현장코어를 통한 중부선 CRCP 상태 평가
3.1. CRCP 두께
3.2. 수평균열 발생 여부
3.3. 철근 깊이 및 간격
3.4. 철근 상태
4. 코어시편의 물성평가를 통한 중부선 CRCP 상태평가
4.1. 압축강도
4.2. 깊이별 염화물 함량
4.3. 염소이온 침투저항성
4.4. 동결융해저항성
5. 결론
REFERENCES
