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Method for preparing modified asphalt mixture using waste and old tyre and hybrid method

A technology of waste tires and modified asphalt, which is applied to building insulation materials, on-site coagulation pavement, building components, etc., to achieve the effects of prolonging service life, reducing road traffic noise, and environmental protection engineering benefits

Inactive Publication Date: 2008-03-05
TONGJI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] According to the patent novelty search, there is no report on the method of using waste tire rubber to prepare asphalt mixture by dry and wet mixing at home and abroad.

Method used

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  • Method for preparing modified asphalt mixture using waste and old tyre and hybrid method
  • Method for preparing modified asphalt mixture using waste and old tyre and hybrid method
  • Method for preparing modified asphalt mixture using waste and old tyre and hybrid method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0034] Example 1: Preparation of rubber-modified asphalt mixture at the construction site

[0035] (1) Preparation of rubber asphalt

[0036] The base asphalt is AH-70 asphalt, and its technical indicators are shown in Table 1. The fine rubber powder is crushed and ground from waste tires at room temperature to obtain 80-mesh fine rubber powder with a relative density of 1.15.

[0037] Table 1AH-70 asphalt technical indicators

[0038]

[0039] The AH-70 asphalt is heated to 190°C, the amount of fine rubber powder is determined to be 15% of the mass of the base asphalt, and the mixing temperature is controlled at 190°C-195°C. Use a high-speed shearing device to mix for 15 minutes, and the stirring speed is 1500 rpm, so that the fine rubber powder is evenly dispersed in the base asphalt, and then continue to stir for 45 minutes, so that the fine rubber powder and the base asphalt can fully react at high temperature, reaching Desired binder properties. Table 2 is the perf...

Embodiment 2

[0057] Example 2: Preparation of rubber-modified asphalt mixture in the laboratory

[0058] The coarse aggregate that adopts in the present embodiment is basalt, and the Vita joint agent of 5% (the mass number of rubber powder) is mixed in the preparation process of rubber asphalt, all the other raw materials are identical with embodiment 1, and the adding of Vita joint agent promotes The rubber powder is chemically combined with the bitumen to reduce the precipitation of the rubber powder.

[0059] (1) Preparation of rubber asphalt

[0060] The dosage of fine rubber powder is 15% of the mass of asphalt, and the dosage of Vita coupling agent is 5% of the mass of rubber powder. The mixing temperature is controlled at 185°C-190°C. First use a high-speed shearing device to mix for 20 minutes, and the stirring speed is 3000 rpm, so that the fine rubber powder and Vita coupling agent are evenly dispersed in the base asphalt, and then continue to stir for 40 minutes to make them f...

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Abstract

This invention relates to the field of engineering material technical, and it is specificly related to the method for preparing a kind of modified bituminous mixture with worn tyre. It is made as follows: mill worn tyre to powder, mix the owder with base bitumen and agitate to get rubber bitumen; gap-graded aggregate, screen the aggregates and get coarse, fine aggregates; mix rubber particles with the coarse and fine aggregates, agitate, then add rubber bitumen and agitate, lastly add powdered ore and mix to get needed production. This invention blends dry and wet processes together to exert each advantage sufficiently, and attained both the aims of consumping much worn tyre and improve pavement performance. With this invention, we can greatly improve high and low temperature behavior of bitumen and its mixture, we can longer pavement life and abate environmental pollution. The pavement paved by this mixture has the behavior of lowering traffic noise. Popularization of this achievement is economic, society, environmental and engineering benefit.

Description

technical field [0001] The invention belongs to the technical field of road engineering materials, and in particular relates to a method for preparing modified asphalt mixture by using waste tires through a mixing method. Background technique [0002] With the rapid development of my country's automobile industry and the improvement of people's living standards, the number of automobiles has increased rapidly year by year, and our country will face the problem of dealing with a large number of waste tires. According to statistics, the number of waste tires in my country reached 80 million in 2002, increasing at an annual rate of 12%. By 2005, it will reach 120 million. Such large-scale waste tires will bring huge environmental pressure to society. Therefore, it is imminent to find a way out for waste tires. [0003] At present, the main ways to dispose of waste tires in the world are stacking (or landfill), burning and recycling. Among them, the application of waste rubbe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L95/00C08L17/00E01C7/20
Inventor 吕伟民曹卫东
Owner TONGJI UNIV