Study On Drought Alpine Region Asphalt Mixture Crack Resistance At Low Temperature

The asphalt mixture's crack resistance at low temperature is one of the key pavement performances in drought alpine region, and aging procedure has important effect on it. Presently research and evaluation method on it are very limited. Through bending creep test and indirect tensile test,this thesis studies the crack resistance at different aging condition. Research shows that the aging procedure will greatly reduce the asphalt mixture's crack resistance. Research also shows that indifferent test condition, sensitivity, accuracy, and stability of indirect tensile test are better than that of bending test. Thus, indirect tensile test can preferably evaluate the crack resistance of asphalt mixture at low temperature.At the same time, the paper also focused on study on the asphalt mixture low-temperature performance as the different loading rate and test the temperature. The results showed that the loading rate and the test temperature impacted the test results obviouly. According to asphalt mixture low-temperature anti-cracking, ageing resistance, and other key performance in the arid and alpine region, the asphalt mixture design and testing standards in the arid and alpine region were put forward..