논문 상세보기
pp.19-32
PURPOSES : The objective of this study is to understand blow-up distress and causes in concrete pavement.
METHODS : Feasible causes of blow-up and existing models were reviewed based on the literature. Three analytical models were adopted to perform a sensitivity analysis. Input parameters reflected the typical concrete pavement of national expressways. Evaluation of blow-up models was based on the amount of temperature increase and zero stress temperature of the concrete pavement.
RESULTS : A review of the literature indicated that the five major causes of blow-up were: increase in temperature and solar radiation, alkaliaggregate reaction (AAR), friction characteristics between the concrete slab and subbase, joint closure (incompressible), and joint freezing. The sensitivity analysis revealed that the coefficient of thermal expansion had the greatest influence on the blow-up safety temperature.
CONCLUSIONS : From existing blow-up model results, it could be concluded that the construction of concrete pavement during the winter season was not effective at preventing blow-up. In addition, an equivalent coefficient of thermal expansion that considers slab expansion due to AAR was proposed as a model input parameter for concrete pavement sections damaged by AAR.
1. 서론
2. 블로우업 발생원인 검토
2.1. 온도 상승 및 일사량 증가
2.2. 알칼리-골재 반응
2.3. 콘크리트 슬래브와 보조기층의 마찰력
2.4. 줄눈부(균열)에 비압축성 물질의 침투
2.5. 줄눈 잠김 현상(Joint Freezing)
2.6. 블로우업 발생원인 종합 분석
3. 블로우업 모델 조사 및 분석
3.1. 일반 모델
3.2. 슬래브 내 온도 구배를 고려한 모델
3.3. 줄눈부 강성을 고려한 모델 Ⅰ
3.4. 줄눈부 강성을 고려한 모델 Ⅱ
3.5. 평탄성을 고려한 모델
4. 국내 환경을 고려한 블로우업 모델 비교 분석
4.1. 모델 비교 분석 절차 수립
4.2. 비교 분석 대상 모델의 선정
4.3. 입력변수 설정
4.4. 민감도 분석
4.5. 블로우업 모델 비교 평가
4.6. 알칼리-골재 반응을 고려한 모델 평가
5. 결론
REFERENCES
