A high modulus asphalt concrete material mixed with coal gasification slag and its preparation method

Abstract

The invention relates to a high-modulus asphalt concrete material doped with coal gasification slag. The high-modulus asphalt concrete material doped with the coal gasification slag is prepared from, by weight, 4.5-5.5 parts of polymer modified asphalt, 80-88 parts of aggregate, 10-20 parts of the coal gasification slag and 0.2-0.3 part of polyacrylonitrile fiber. The invention further provides a preparation method of the high-modulus asphalt concrete material doped with the coal gasification slag. The high-modulus asphalt concrete material doped with the coal gasification slag and the preparation method thereof have the advantages that the coal gasification slag is rich in graphite phase and good in compatibility with asphalt and improves the adhesivity of the asphalt and the aggregate; the elasticity modulus and stiffness modulus of asphalt mortar are increased, accumulated deformation of the mixture is reduced, and ruts of an asphalt concrete pavement are effectively restrained; the asphalt concrete material is doped with the polyacrylonitrile fiber, good bridging and reinforcing effects are achieved, high-temperature stability, low-temperature crack resistance, anti-fatigue performance and water stability of high-modulus asphalt concrete are further promoted, and the service life of the asphalt pavement is prolonged; the coal gasification slag is used in an environment-friendly way, and a successful model of green development is achieved.

Description

technical field [0001] The invention relates to the field of asphalt pavement material preparation, in particular to a high-modulus asphalt concrete material mixed with coal gasification slag and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of expressway in our country, asphalt pavement has been widely used. At present, more than 90% of the highways built in our country use asphalt pavement. Because it has the advantages of smooth surface, no joints, small vibration, low noise, comfortable driving, short construction period, easy maintenance and repair, and suitable for phased construction. Among the highway asphalt pavements that have been opened to traffic, most of them are in good condition. However, with the sharp increase in traffic volume, the number of multi-axle heavy-duty vehicles continues to increase, and there are overloaded and heavy-duty phenomena in some sections of the road, resulting in prominent r...

AI Technical Summary

Problems solved by technology

However, with the sharp increase in traffic volume, the number of multi-axle heavy-duty vehicles continues to increase, and there are overloaded and heavy-duty phenomena in some sections of the road, resulting in prominent rutting problems on local asphalt pavements

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