In-situ thermal-regenerative asphalt mixture gradation preparation method

A technology of asphalt mixture and recycled asphalt, which is applied in the direction of mixers, chemical instruments and methods, mixer accessories, etc., can solve the problems of wasting non-renewable resources of old asphalt mixture, occupying the stacking site, and increasing the cost of the project, and achieves the test method Simple and feasible, easy to realize, accurate and reliable test data

Inactive Publication Date: 2012-10-17
JIANGSU SHANSHUI ENVIRONMENT CONSTR GRP
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AI Technical Summary

Problems solved by technology

[0003] Conventional maintenance methods such as pavement overhaul and reconstruction waste a large amount of non-renewable resources such as old asphalt mixture, occupy storage space, and pollute the environment; at the same time, paving new roads and mining new stones and asphalt increases the project cost

Method used

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Embodiment Construction

[0017] Determine the target gradation of hot-in-place recycled asphalt mixture according to the use layer and design requirements; according to the test method for mineral material gradation of asphalt mixture stipulated in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" (JTG E20-2011) ( T0725-2000) carry out gradation inspection on the recovered original asphalt pavement mixture; conduct disease investigation on the original pavement, and estimate the ratio of new materials to be added for hot-in-place regeneration, which is generally in the range of 15% to 30%, and the disease investigation should focus on Focusing on the rut investigation, the addition of new materials is to correct the original pavement asphalt mixture gradation, and the second is to fill the original pavement ruts; based on the original pavement asphalt mixture gradation determined in step 2 and the new material addition ratio determined in step 3, With the target grading det...

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Abstract

The invention discloses an in-situ thermal-regenerative asphalt mixture gradation preparation method. The method comprises the steps that: a target gradation of the in-situ thermal-regenerative asphalt mixture is determined according to the application horizon and design requirements; according to an asphalt mixture aggregate gradation testing method specified by highway engineering asphalt and asphalt mixture testing procedures, recovered original asphalt pavement mixture is subjected to gradation testing; an original pavement is subjected to damage investigation, and the proportion of a novel material needed to be added for in-situ thermal regeneration is estimated, wherein the proportion of the added novel material is 15-30%; according to the determined original pavement asphalt mixture gradation and the determined novel material addition proportion, with the determined target gradation as a target, a novel material gradation is modulated and obtained; according to the obtained novel material gradation and the obtained original pavement asphalt mixture gradation, the in-situ thermal-regenerative asphalt mixture gradation is prepared and obtained indoor. With the preparation method provided by the invention, the testing data is accurate and reliable, and the testing method is simple and feasible, such that the method can easily be realized. Therefore, the method has a good popularization value.

Description

technical field [0001] The invention is a method for preparing the gradation of hot-in-place recycled asphalt mixture, which helps to correctly design the gradation of hot-in-place recycled asphalt mixture, so as to obtain hot-in-place recycled asphalt mixture and hot-in-place recycled asphalt mixture that meet performance requirements The asphalt pavement belongs to the technical field of highway asphalt pavement regeneration. Background technique [0002] By the end of 2011, the total mileage of expressways in my country had exceeded 85,000 kilometers. Asphalt pavement has the characteristics of smooth surface, comfortable driving, short construction period, and easy maintenance and repair, and has been more and more widely used. Asphalt pavement has become the main pavement form of expressways in my country. Due to the structural form of asphalt pavement in our country, the design and quality of asphalt mixture, and construction reasons, coupled with the relatively harsh...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01F15/04C04B26/26
Inventor 袁浩马涛姚岗陈卫星
Owner JIANGSU SHANSHUI ENVIRONMENT CONSTR GRP
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