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pp.37-45
URPOSES: The objective of this study was to develop an impact resonance (IR) test procedure for thin disk-shaped specimens in order to determine the ⎢E*⎢ and phase angle values of various asphalt mixtures.
METHODS: An IR test procedure was developed for evaluating thin disk-shaped specimens, in order to determine the dynamic modulus (⎢E*⎢) of various asphalt mixtures. The IR test method that was developed to determine the elastic modulus values of Portland cement concrete was evaluated, which method uses axisymmetric flexural vibration proposed by Leming et al. (1996). The IR tests were performed on three different mixtures of New York with varying nominal maximum aggregate sizes (NY9.5, NY19, and NY25) at six different temperatures (10 - 60℃). The ⎢E*⎢ values obtained from the IR tests were compared with those determined by the commonly used AASHTO T342-11 test.
RESULTS AND CONCLUSIONS : The IR test method was employed to determine the ⎢E*⎢ values of thin-disk-shaped specimens of various asphalt mixtures. It was found that the IR test method when used with thin disk-like specimens is a simple, practical, and cheap tool for determining the ⎢E*⎢ values of field cores. Further, it was found the ⎢E*⎢ values obtained from the IR tests using thin disk-like specimens were almost similar to those obtained using the AASHTO T342-11 test.
2. 문헌고찰
2.1. 동탄성계수 (Dynamic Modulus)
2.2. 충격공진시험
2.3. Leming et al. 연구의 분석
3. 연구목적 및 실험계획
3.1. 연구목적
3.2. 실험시편 제작
3.3. 실험방법
4. 실험결과 및 분석
4.1. 충격공진시험의 반복성에 대한 평가
4.2. 충격공진시험을 적용한 아스팔트 콘크리트동탄성계수 결정 가능성 평가
5. 결론
REFERENCES
