Abstract
This paper introduces dynamic water effect into the test, develops a laboratory test device for simulating the dynamic water effect on asphalt pavement, and puts forward a test method of dynamic water effect working together with load, water and temperature. Based on this method, the high temperature stability of seven kinds of asphalt mixtures with the factors of asphalt grade, gradation and air voids are studied. The research shows that the effect of dynamic water can take adverse effect for the high temperature stability of asphalt mixture. The effect degree is different under different factors. It is the most disadvantaged when the air voids of the mixture is near 10%, the skeleton structure gradation of mixture is better than the suspended structure at the most disadvantage air voids, and the mixture made of high viscosity asphalt is more affected when the temperature is higher.
Highlights
Along with the increasing traffic volume, traveling speed and axle loads, serious premature failures occurred on many asphalt pavements soon after opening to the traffic, such as flooding oil, loose inside, frost boiling, settlement and bottom stripping [1]
This paper introduces the effect of dynamic water into the test, develops a laboratory test machine for simulating asphalt pavement effected by dynamic water, and puts forward a test method of dynamic water effect working together with load, water and temperature
The specimens should be pretreatment with the dynamic water effect, and tests the changes for the high temperature stability of asphalt mixture
Summary
Abstract:This paper introduces dynamic water effect into the test, develops a laboratory test device for simulating the dynamic water effect on asphalt pavement, and puts forward a test method of dynamic water effect working together with load, water and temperature. Based on this method, the high temperature stability of seven kinds of asphalt mixtures with the factors of asphalt grade, gradation and air voids are studied. It is the most disadvantaged when the air voids of the mixture is near 10%, the skeleton structure gradation of mixture is better than the suspended structure at the most disadvantage air voids, and the mixture made of high viscosity asphalt is more affected when the temperature is higher
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