Self-healing type bituminous concrete and preparation method thereof

Abstract

The invention discloses self-healing type bituminous concrete and a preparation method thereof. The self-healing type bituminous concrete is prepared from, by mass, 100 parts of mineral material, 5-6 parts of SBS modified bitumen and 1.5-2.5 parts of magnetic metal. The preparation method includes the following steps of firstly, preheating mineral material, modified bitumen and magnetic metal to obtain preheated mineral material, preheated modified bitumen and preheated magnetic metal respectively; secondly, mixing and stirring preheated mineral material, preheated modified bitumen and preheated magnetic metal to obtain a mixture; thirdly, forming the mixture to obtain the self-healing type bituminous concrete. The self-healing type bituminous concrete is more uniform in grade distribution, and the surface contact of concrete and steel wool is tighter; due to the steel wool, the rigidity of the bituminous concrete is enhanced, the bituminous concrete is prevented from cracking; by heating the steel wool through electromagnetic waves, bitumen is softened, and a bituminous pavement is healed again. The service life of the bituminous pavement is prolonged, traffic delay time is shortened, maintenance expenses are saved, and economic and social benefits are good.

Description

technical field [0001] The invention belongs to the field of asphalt concrete preparation, and in particular relates to a self-healing asphalt concrete and a preparation method thereof. Background technique [0002] At present, the early diseases of the asphalt pavement of expressway in our country are rutting and cracking as the main form, especially on the expressway with heavy load and channelized traffic, rutting and cracking are more common, and the road surface milling and resurfacing caused by rutting and cracking Maintenance and repair costs are increasing year by year at a high rate. [0003] The main maintenance methods for rutting and cracking of asphalt pavement on high-grade roads in my country are laying a layer of slurry seal, micro-surface overlay or partial pavement repair, but this can only temporarily alleviate the damage of the pavement, and cannot fundamentally solve the road disease. If the pavement is severely damaged, the entire pavement needs to be ...

AI Technical Summary

Problems solved by technology

[0003] The main maintenance methods for rutting and cracking of asphalt pavement on high-grade roads in my country are laying a layer of slurry seal, micro-surface overlay or partial repair of the pavement, but this can only temporarily alleviate the damage of the pavement, and cannot fundamentally solve the road disease

If the pavement is severely damaged, the entire pavement needs to be milled and regenerated in situ or re-paved. This maintenance method consumes a lot of manpower, material resources, and financial resources.

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