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Method for finely sorting and reusing road milling asphalt waste materials

A kind of asphalt waste, fine separation technology, applied in the field of recycled asphalt, can solve the problems of technical difficulty in recycling, inability to guarantee the use effect of asphalt, and affect the blending rate of RAP, etc., to achieve the reduction of material costs, significant economic benefits, and ease the tension between supply and demand Effect

Inactive Publication Date: 2019-10-15
SHENZHEN MUNICIPAL ENG +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the RAP blending rate of the hot-mixed asphalt mixture in our country is generally controlled at about 20%. However, in the actual production and application of the hot-mixed asphalt recycling technology in the asphalt plant, due to the variability of RAP and its performance instability, the blending ratio of RAP is often affected. ratio, which brings difficulties to the recycling technology of road milling asphalt waste, and cannot guarantee the use effect of recycled asphalt

Method used

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  • Method for finely sorting and reusing road milling asphalt waste materials
  • Method for finely sorting and reusing road milling asphalt waste materials
  • Method for finely sorting and reusing road milling asphalt waste materials

Examples

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Embodiment 1

[0030] A method for finely sorting and reusing road milling asphalt waste, specifically comprising the following steps:

[0031] S1: Use a cold milling machine to plan serious cracks, ruts, potholes, and loose asphalt pavement, and collect and screen the asphalt waste produced by milling;

[0032] S2: Use a 11mm sieve to divide asphalt waste into coarse asphalt 10-20mm and fine asphalt 0-10mm, and test the combustion and performance of the two grades of asphalt waste, and also detect the physical indicators in the asphalt waste;

[0033] S3: mix the detected asphalt waste with the currently prepared AC-20 asphalt, and properly adjust the ratio of each grade of material so that the final synthetic gradation is close to the GAC-20 synthetic gradation, that is, a new synthetic asphalt is obtained;

[0034] S4: Refer to the series of studies on the mix ratio of GAC-20. When calculating the asphalt dosage by using the mix ratio of the newly synthesized asphalt mixture, it is necess...

Embodiment 2

[0041] A method for finely sorting and reusing road milling asphalt waste, specifically comprising the following steps:

[0042] S1: Use a cold milling machine to plan serious cracks, ruts, potholes, and loose asphalt pavement, and collect and screen the asphalt waste produced by milling;

[0043] S2: Use a 11mm sieve to divide asphalt waste into coarse asphalt 10-20mm and fine asphalt 0-10mm, and test the combustion and performance of the two grades of asphalt waste, and also detect the physical indicators in the asphalt waste;

[0044] S3: mix the detected asphalt waste with the currently prepared AC-20 asphalt, and properly adjust the ratio of each grade of material so that the final synthetic gradation is close to the GAC-20 synthetic gradation, that is, a new synthetic asphalt is obtained;

[0045] S4: Refer to the series of studies on the mix ratio of GAC-20. When calculating the asphalt dosage by using the mix ratio of the newly synthesized asphalt mixture, it is necess...

Embodiment 3

[0052] A method for finely sorting and reusing road milling asphalt waste, specifically comprising the following steps:

[0053] S1: Use a cold milling machine to plan serious cracks, ruts, potholes, and loose asphalt pavement, and collect and screen the asphalt waste produced by milling;

[0054] S2: Use a 11mm sieve to divide asphalt waste into coarse asphalt 10-20mm and fine asphalt 0-10mm, and test the combustion and performance of the two grades of asphalt waste, and also detect the physical indicators in the asphalt waste;

[0055] S3: mix the detected asphalt waste with the currently prepared AC-20 asphalt, and properly adjust the ratio of each grade of material so that the final synthetic gradation is close to the GAC-20 synthetic gradation, that is, a new synthetic asphalt is obtained;

[0056] S4: Refer to the series of studies on the mix ratio of GAC-20. When calculating the asphalt dosage by using the mix ratio of the newly synthesized asphalt mixture, it is necess...

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Abstract

The invention relates to the technical field of reclaimed asphalt, and discloses a method for finely sorting and reusing road milling asphalt waste materials. The method specifically comprises the following steps that S1, a cold milling machine is adopted for milling asphalt pavement with serious cracks, ruts, pit grooves and looseness, and the milling asphalt waste materials are collected and screened; and S2, the asphalt waste materials are divided into 10-20 mm of coarse-grade asphalt and 0-10 mm of fine-grade asphalt by adopting an 11 mm sieve, the two-grade asphalt wastes are correspondingly subjected to combustion and performance detection, and meanwhile, the physical indexes in the asphalt waste materials are detected. According to the method, the road milling asphalt waste materials are finely sorted and reused, various physical indexes of new synthetic asphalt are not greatly changed by virtue of a series of test data, the anti-rutting capacity of regenerated asphalt mixture is gradually enhanced along with the increase of the mixing amount of the asphalt waste materials, and the water stability of the mixture is better along with the reduction of the mixing amount of theasphalt waste materials in the regenerated asphalt mixture.

Description

technical field [0001] The patent of the present invention relates to the technical field of recycled asphalt, in particular, to a method for finely sorting and reusing road milling asphalt waste. Background technique [0002] With the continuous implementation of favorable policies and the gradual improvement of the traffic road network, the mileage of my country's highways has continued to increase. According to relevant statistics from the Ministry of Communications, by the end of 2017, the total mileage of highways in my country reached 4,773,500 kilometers, including 136,500 kilometers of expressways. At present, many early asphalt pavements have serious cracks, ruts, potholes, and looseness. In the process of renovating and rebuilding the original pavement, a large amount of waste asphalt mixture (Reclaimed Asphalt Pavement, RAP for short) will be produced. If it is not recycled, it will not only occupy a large amount of land, pollute the surrounding ecological enviro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E01C19/10E01C23/09
CPCE01C19/1004E01C19/104E01C23/09
Inventor 范璐璐于芳刘忠陈建友丁学志姚尚峰
Owner SHENZHEN MUNICIPAL ENG
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