High-modulus bituminous mixture admixed with waste material, preparation method and method for preparing mixture specimen

Abstract

The invention discloses high-modulus bituminous mixture admixed with waste material, a preparation method and a method for preparing mixture specimen. The high-modulus bituminous mixture admixed with the waste material comprises aggregate, mineral powder and TLA modified asphalt, wherein the aggregate comprises waste material obtained after milling roads and new aggregate. The TLA modified asphalt comprises matrix asphalt and lake asphalt, wherein the mass of the waste material is 30%-70% of the total mass of the high-modulus bituminous mixture; if the aging asphalt in the waste material and the TLA modified asphalt are adopted as a complete binding material, the mass rate of the binding material to the aggregate is 4.5%-6.5%, and the mass fraction of the TLA modified asphalt is 4.3%-6.1% of the high-modulus bituminous mixture; the mass of the lake asphalt is 30%-50% of the total mass of the TLA modified asphalt; the mass of the mineral powder is 0.5%-4% of the total mass of the high-modulus bituminous mixture; and the residue is the new aggregate. The high-modulus bituminous mixture admixed with the waste material has the characteristics of high dynamic modulus, good deformation performance, high dynamic stability and good fatigue property; and the high-modulus bituminous mixture admixed with the waste material achieves the dual goals of realizing the regeneration of the waste material at high proportion and solving the rutting diseases on pavements.

Description

technical field [0001] The invention belongs to the field of road building materials, and in particular relates to a high-modulus asphalt mixture mixed with old materials and a preparation method thereof. Background technique [0002] At present, the pace of expressway construction in my country is accelerating, and the maintenance and repair tasks of roads are intensified accordingly. Every year, tens of millions of tons of old road materials (RAP) will be produced during road reconstruction, renovation or maintenance. How to deal with road materials reasonably and effectively, and how to effectively protect the ecological environment while developing roads, will become must face the problem. According to the existing research experience, using asphalt recycling technology to recycle old road materials will be an effective method to solve the problem of road old materials. The research idea of ​​traditional asphalt mixture regeneration is to soften the aged and hardened a...

AI Technical Summary

Problems solved by technology

In Europe, such as France, Spain, Italy and other countries, in recent years, research on high modulus asphalt mixture with old materials has been started, but there is no such research in our country, and the conditions for using low-grade hard asphalt in our country are not yet available. mature, so it is necessary to study the high modulus asphalt mixture with old materials suitable for the actual situation in our country