공항 콘크리트 포장에 대한 HWD 시험 결과와 온도인자의 상관관계 분석 Analysis of Correlation between HWD Test Results and Temperature Factors for Airport Concrete Pavements
pp.127-138
PURPOSES : The performance of pavements is decreased by reduced bearing capacity, deterioration, and distress due to complex loading conditions such as traffic and environmental loads. Therefore, the proper maintenance of pavements must be performed, and accurate evaluation of pavement conditions is essential. In order to improve the accuracy of the heavy weight deflectometer (HWD), which is a nondestructive evaluation method, the correlation between HWD test results and temperature factors were analyzed in this study.
METHODS : The HWD test was conducted five times for one day on airport concrete pavement, and the ambient temperature, surface temperature, and slab internal temperature were collected. Since the slab internal temperature was nonlinear, it was replaced by the equivalent linear temperature difference (ELTD). The correlation between the HWD test results and each temperature factor was analyzed by the coefficient of correlation and coefficient of determination.
RESULTSAND: The deflection of the slab center, mid edge, and corner, and impulse stiffness modulus (ISM) showed significantly high correlation with each temperature factor, especially the ELTD. However, the load transfer Efficiency (LTE) had very low correlation with the temperature factors. CONCLUSIONS : It is necessary to analyze the effect of aggregate interlocking on LTE according to the overall temperature changes in slabs by conducting seasonal HWD tests. It is also necessary to confirm the effect of seasonal temperature changes on deflection and ISM.
1. 서론
2. HWD 시험계획 및 시험결과
2.1. HWD 시험계획
2.2. HWD 시험결과
3. 온도인자 수집 및 분석
3.1. 대기온도와 표면온도
3.2. 슬래브 내부 온도와 등가선형온도차이
4. HWD 시험결과와 온도인자의 상관관계
4.1. 상관도 분석
4.2. 처짐량과 온도인자의 상관도
4.3. ISM과 온도인자의 상관도
4.4. LTE와 온도인자의 상관도
4.5. 분석결과의 정리
5. 결론
REFERENCES