Semi-flexible pavement material, preparation method therefor and semi-flexible pavement

Abstract

The invention discloses a semi-flexible pavement material, a preparation method therefor and a semi-flexible pavement. The semi-flexible pavement material is prepared from the raw materials, i.e., a cement grouting material and an asphalt mixture in parts by mass, wherein the cement grouting material contains 15-20 parts of cement, 8-10 parts of emulsified asphalt, 0.03-0.06 part of water reducing agent, 0.06-0.2 part of polypropylene fibers, 10-15 parts of mineral powder, 30-35 parts of sand, 8-10 parts of fly ash, 0.06-0.12 part of expanding agent and 0.03-0.06 part of interface modifier. According to the semi-flexible pavement material disclosed by the invention, the cement grouting material is added with the emulsified asphalt, the fly ash, the polypropylene fibers, the mineral powder, the water reducing agent, the expanding agent and the interface modifier which are mutually compounded and are in synergism, so that the cement grouting material can be easily subjected to dry shrinkage, the condition that the interfacial adhesion performance of cement-asphalt concrete is poor is improved, and thus, the crack resistance is improved. In addition, asphalt of the asphalt mixture is rubber asphalt, so that the crack resistance and adhesion property of the asphalt mixture are improved.

Description

technical field [0001] The invention relates to the technical field of pavement construction materials, in particular to a semi-flexible pavement material, a preparation method thereof, and a semi-flexible pavement. Background technique [0002] As a new type of pavement structure, semi-flexible pavement combines the rigidity of cement-based materials and the viscoelasticity of asphalt-based materials to achieve a combination of rigidity and flexibility. It improves the pavement's ability to resist loads. At the same time, its high temperature stability and water damage resistance are much better than ordinary asphalt concrete pavement. Its shear resistance, fatigue resistance and anti-skid and wear resistance are also better than ordinary Asphalt concrete pavement, because of its excellent road performance, is more and more used in heavy-duty pavement. [0003] In the prior art, although the asphalt concrete pavement is grouted with cement mortar, the anti-rutting ability ...

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Problems solved by technology

[0003] In the prior art, although the asphalt concrete pavement is grouted with cement mortar, the anti-rutting ability of the pavement is enhanced, and the overall bearing capacity of the pavement is improved, but this type of semi-flexible pavement also has certain defects. The material properties between asphalt and cement Due to the difference, there are technical problems such as poor matching of mechanical properties between cement-based grouting materials and asphalt mixtures, large differences in temperature sensitivity, and poor surface-interface bonding performance, thus causing defects such as large dry shrinkage and temperature shrinkage of grouting materials, and easy cracking of the road surface.

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