Preparation method of multifunctional regenerated water-permeable asphalt surface layer

Abstract

The invention provides a preparation method of a multifunctional regenerated water-permeable asphalt surface layer. The method comprises the steps: performing heating and drying on steel slag and 70#A-grade pavement petroleum asphalt, performing mixing and stirring, adding a regenerant, performing stirring and even mixing, then adding waste tire rubber particles, performing stirring and even mixing, adding fly ash, then adding the remaining 70#A-grade pavement petroleum asphalt, and performing even mixing so as to obtain the multifunctional regenerated water-permeable asphalt surface layer, wherein the matching is as follows: 77-85 parts of the steel slag, 4-6 parts of the 70#A-grade pavement petroleum asphalt, 2-5 parts of the regenerant, 3-6 parts of the waste tire rubber particles and 9-19 parts of the fly ash, and the steel slag is steel tailings obtained through hot stewing-magnetic separation. Through the preparation method, not only can the problems of environmental pollution and safety hazards caused by large-amount stockpiling of the steel tailings be solved, but also mountain quarrying can be reduced so as to relieve the bottleneck restriction of resource supply effectively, so that reuse of waste tires is achieved; and meanwhile, the raw material cost is reduced, the use amount of asphalt is reduced, and the preparation method has great significance to alleviation ofshortage of urban building material resources, development of local circular economy and promotion of construction of conservation-oriented cities.

Description

technical field [0001] The invention belongs to the technical field of pavement design, and relates to a preparation method of a multifunctional recycled permeable asphalt surface layer. Background technique [0002] my country's steel output ranks first in the world, accounting for about 50% of the world. In 2016, the production of steel slag was about 120 million tons, but its comprehensive utilization rate is currently less than 15%. Using it as aggregate is a practical way for large-scale comprehensive utilization of steel slag. Steel slag aggregate has high strength and wear resistance, and it is closely combined with cement paste, asphalt mortar, etc. It is a high-quality potential aggregate, especially for road concrete with deep color, wear resistance, and anti-skid and other natural aggregates are difficult to match. [0003] Car tires are a kind of consumables. When each car reaches a certain mileage, the tires will be replaced once. The replaced waste tires are ...

AI Technical Summary

Problems solved by technology

In 2016, the production of steel slag was about 120 million tons, but its comprehensive utilization rate is currently less than 15%. Using it as aggregate is a practical way for large-scale comprehensive utilization of steel slag

Traditional impermeable pavements have brought a series of problems to the city, which are mainly manifested in the following aspects: Rainwater can only be discharged through underground rainwater pipes. Due to the limited discharge capacity of existing rainwater pipes, when heavy rain or heavy rain , it is easy to cause large-scale water accumulation on the road surface; the replenishment of groundwater by rainwater is blocked, which has a series of adverse effects on urban ecology; rainy days are easy to form a water film on the road surface or road accumulation, which weakens the anti-skid performance of the road surface and increases traffic safety hazards ;Traditional roads are impermeable and airtight, and it is difficult to transfer heat, making the urban surface like a desert

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