Study On The Optimization Of HMA Anti-stripping Performance Test For Hydrodynamic Pressure

The asphalt pavement tends to be damaged by early water damage,such as looseinternal,peeling,tunnel,and qing.The root cause of these water damage is the lack of the anti-stripping/loose ability of the asphalt mixture itself,which makes the bitumen slurry from the stone material to indicate the disengagement of the flaking or the stone particles.Therefore,the effective evaluation of the anti-stripping/loose ability of asphalt mixture is a key factor in improving the related performance of asphalt mixture.Currently,the test method used to evaluate the anti-stripping performance of asphalt mixture is only applicable to the qualitative description of the adhesive properties of asphalt and aggregates,and lacks quantitative evaluation indexes.It has been shown that under the coupling of water-vehicle load,the dynamic water pressure generated in asphalt pavement is one of the main inducements to cause and accelerate water damage.Road surface water circumstances,the action of vehicle load repeated action makes high pore water pressure is generated in the road causes the asphalt and aggregate stripping or off between aggregate particles,surface of a road leading to diseases.In order to effectively simulate the dynamic water pressure on asphalt mixture,the effects of spalling/loose,this research developed a new test method,is used to evaluate asphalt antistripping/loose performance.The test method is based on air compressor,vacuum extraction instrument and maximum theoretical density tester,which is assembled into a test system to simulate the dynamic water pressure formed by the actual pavement.However,the test method is initially suspended matter concentration as evaluation index,the test results large discreteness,and only the qualitative comparison of spalling resistance,between different mixture also quantitatively describe the anti-stripping performance of asphalt mixture.In view of this,the team has been developed based on dynamic water pressure of the asphalt mixture of spalling/loose test method on the basis of performance evaluation,this article put forward to test the suspension mucus quality as evaluation index,spalling resistance of asphalt mixture/loose ability evaluation,with X fluorescence analysis method to explore the carved out of the source of the suspended muddy thing.In combination with X fluorescence analysis,test results show that thesuspended muddy thing quality evaluation index,can effectively evaluate the performance of asphalt mixture,and discrete small,there is not much affected by human factors;The suspended turbidity of the simulated test contains most of the stone,a small amount of mineral powder and asphalt.In addition,based on the dynamic water pressure spalling/loose asphalt mixture performance test method,in this paper,the study found that: under the action of moving water,diabase,basalt and asphalt coated sex is better than that of the limestone;Different bitumen,different from the binding properties of stone materials;Different fillings have different effects on the anti-stripping performance of asphalt mixture.