Abstract Aggregate dispersion is one of the main diseases of porous asphalt. Reasonable material composition can effectively reduce the occurrence of dispersion disease. In order to study how to determine the volume index and mechanical properties of the mixture from the five aspects of asphalt, asphalt oil film thickness, coarse aggregate, fiber and filler, this paper selects different kinds of materials and different additions, based on the benchmark mix ratio, and carries out the Kentucky dispersion test to reduce the dispersion disease of the porous asphalt. Through the analysis of the test results, it is verified that adopting high-viscosity modified asphalt, increasing the thickness of asphalt oil film, adding lime or hydrated lime as filler, and adding a certain amount of fiber can enhance the anti-flying performance of porous asphalt mixture. At the same time, the article carries out experimental analysis of various additives for different materials. Finally, various material comparison schemes to improve the anti-flying performance of porous asphalt mixture were formed. In terms of the selection and use of raw materials, it provides certain guidance for the construction of porous asphalt.
Abstract The waterproof bonding layer is between the bridge deck and the asphalt pavement, and its performance is very important to ensure the quality of the entire pavement system In this paper, the tension strength, elongation at break and thermosetting index are used to comprehensively judge the optimal ratio of A and B components of high temperature epoxy in the adhesive layer, and the characterization of secondary (step) current performance is explored The epoxy resin adhesive layer is analyzed and verified in the 60 ° C curing environment The best construction time corresponding to different application amounts is determined On this basis, the optimal amount of waterproof adhesive layer and adhesive layer is determined, and its performance is verified The results show that the optimal ratio of high temperature epoxy resin in adaptive layer A: B is 10: 9, the curing time at 60 ° C is 5 hours, and the validity period is about 3 hours The optimal amount of adhesive layer between mixture layers is about 0.60 kg/m 2 , and the optimal amount of adhesive layer between steel plate and mixture is about 0.42 kg/m 2 The adaptive layer has good low temperature crack resistance and can be applied to low temperature areas in the north
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