Drainage regenerated asphalt mixture and match ratio design method thereof

Abstract

The invention discloses a drainage regenerated asphalt mixture. The mixture comprises a recycled material, aggregate, padding, a fiber stabilizer and cutback asphalt, wherein the recycled material is formed by digging and milling a used drainage asphalt mixture on a pavement for more than ten years; the aggregate comprises coarse aggregate and fine aggregate; the coarse aggregate adopts basalt; the fine aggregate adopts limestone; the nominal maximum aggregate size of the aggregate is 13.2mm; the padding adopts lime stone dust; the fiber stabilizer adopts lignin fiber, basalt mineral fiber or mixed fiber of the lignin fiber and the basalt mineral fiber; the mixing amount of the fiber stabilizer is 0.1 to 0.6 percent of the mass of the drainage regenerated asphalt mixture; the cutback asphalt adopts cutback polymer modified asphalt, and the mixing amount of the cutback asphalt is 4.8 to 7.6 percent of the mass of the drainage regenerated asphalt mixture. The invention further discloses a match ratio design method of the drainage regenerated asphalt mixture. The match ratio design method ensures that the blending ratio of the recycled material is optimized while guaranteeing the pavement performance of the drainage asphalt mixture.

Description

technical field [0001] The invention belongs to the technical field of building materials used in road engineering, and in particular relates to a drainage recycled asphalt mixture and a proportioning design method thereof. Background technique [0002] Drainage asphalt pavement is a typical skeletal pore structure. A large number of connected spaces form a developed drainage network inside the road. Rainwater is discharged from the inside of the road body along the cross slope of the road through the network. Due to its excellent anti-skid performance, Functions such as no accumulation of water on the surface and sound absorption and noise reduction have been widely promoted and applied in the construction of the upper layer of asphalt pavement. In the repair stage, how to deal with these waste drainage asphalt mixtures is an urgent task at present. [0003] Since the drainage asphalt mixture mostly uses expensive high-viscosity modified asphalt and high-quality aggregates...

AI Technical Summary

Problems solved by technology

[0005] At present, drainage asphalt pavement has been vigorously developed as a new type of pavement in China, but considering the life span of asphalt pavement, the matching regeneration technology has not been effectively solved

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