Research on the Preparation and Performance of Modified Emulsified Asphalt Grouting Material for Semi-flexible Pavement
Traditional cement-based grouting material is prone to cracking and limits the application of semi-flexible pavement materials.Modified emulsified asphalt was used to improve the performance of cement-based grouting material,and the road performance of asphalt mixtures was analyzed.The optimal asphalt-cement ratio and water-cement ratio of the modified emulsified asphalt grouting material(SGM)and the optimal void ratio of the matrix asphalt mixture were determined by response surface methodology.And scanning electron microscopy was used to analyze the microscopic morphology of SGM.Response surface analysis results show that the optimal void ratio of matrix asphalt mixture is 25.75％,the optimal asphalt-cement ratio of SGM is 0.07,and the water-cement ratio is 0.33.The scanning electron microscope test results show that the modified emulsified asphalt is uniformly filled in the voids of the rod shaped hydration product,and interconnection of the two enhances flexibility of the grouting material,the grout fullness of SGM semi-flexible pavement materials is largely unaffected,and the low-temperature crack resistance can be improved by 45％.
semi-flexible pavementmodified emulsified asphalt grouting materialresponse surface methodologyasphalt-cement ratiowater-cement ratio
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