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The purpose of this research is to study the effect of rest periods on the fatigue response of asphalt concrete mixtures due to the repeated loading applications by using linear elastic fracture mechanics and Schapery's theory of viscoelastic media crack growth. The results of a series of third-point bending tests indicated that the two fatigue damage properties K1 and K2 were in good agreement with those of the theoretical prediction having the expression of the constant values of failure zone size and fracture energy in the crack growth. Specimens with low temperature and asphalt content of 0.5% more than optimum content exhibited longer fatigue life due to the higher stiffness in the mixtures. Besides, the number of repetitions to failure increased with the rest period and was more significantly exhibited at higher temperature.
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Hsu et al. (1996) studied this question.
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