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A method for evaluating the uniformity of recycled asphalt mixture

A technology of recycled asphalt and evaluation method, which is applied in the direction of material analysis, material analysis through optical means, image analysis, etc. It can solve the problems of single uniformity evaluation angle, failure to evaluate the mixing uniformity of new and old materials, etc., and achieve low cost, Accurate uniformity, quick and convenient operation

Active Publication Date: 2021-08-17
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For this reason, one of the purposes of the present invention is to provide a method for evaluating the uniformity of recycled asphalt mixture, which evaluates its uniformity from the perspectives of new and old aggregates, new aggregates, and pores, and solves the problem of regeneration in the prior art. The evaluation angle of asphalt mixture uniformity is too single and the technical problem of failing to evaluate the uniformity of mixing new and old materials, and the evaluation accuracy is higher

Method used

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  • A method for evaluating the uniformity of recycled asphalt mixture
  • A method for evaluating the uniformity of recycled asphalt mixture
  • A method for evaluating the uniformity of recycled asphalt mixture

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Experimental program
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Embodiment

[0164] A method for evaluating the homogeneity of recycled asphalt mixture, comprising the steps of:

[0165] The first step: sample preparation

[0166] The old material comes from the asphalt pavement of Changsha Airport Expressway, and its structure is: overlay layer 4cm modified asphalt AC-13 + upper layer 4cm modified asphalt AC-16(I) + middle surface layer 5cm modified asphalt AC-25(I ) + 6cm of asphalt stabilized macadam AM-25 in the lower layer + 20cm of cement stabilized macadam (6%) in the base course + 20cm of cement stabilized macadam in the subbase (4%).

[0167] The asphalt used in the new asphalt mixture is from SBS modified asphalt (I-D) of Liaoning Taichang Technology Co., Ltd.; the aggregate is from Xiangxi Autonomous Prefecture Hengtong Diabase Development Co., Ltd., and the rock is diabase; the filler is from Taiwan Cement Co., Ltd. Mineral powder.

[0168] Form Marshall specimens according to design gradation; figure 1 Use a cutting machine to divide th...

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Abstract

The invention discloses a method for evaluating the uniformity of recycled asphalt mixture. The method adopts three uniformity evaluation indexes, which are: the evaluation of aggregate distribution uniformity based on equal-area ring fan division; the evaluation based on particle position and area. Evaluation of distribution uniformity of new aggregates; evaluation of pore distribution uniformity based on section porosity. Compared with the commonly used asphalt concrete uniformity evaluation index, the method for evaluating the uniformity of recycled asphalt mixture in the present invention evaluates its uniformity from three angles of new and old aggregates, new aggregates and pores, and has high accuracy.

Description

technical field [0001] The invention belongs to the technical field of uniformity evaluation of recycled asphalt pavement. In particular, it relates to a method for evaluating the uniformity of recycled asphalt mixture. Background technique [0002] Every year, a large number of asphalt pavement in our country enters the repair and maintenance period, and the method of milling and resurfacing is usually used for renovation. However, this maintenance method will generate a large amount of discarded old asphalt pavement materials, which not only wastes resources, but also pollutes the environment. Therefore, the recycling of pavement materials has become an inevitable trend of highway maintenance in our country. The hot-in-place recycling technology can utilize 100% of the old asphalt pavement materials, which has significant economic and environmental benefits, but it is prone to the problem of uneven asphalt mixture. Accurate quantitative evaluation of uniformity can provi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/84G06T7/00G06T7/11G06T7/136G06T7/62
CPCG01N21/84G01N2021/8405G06T7/0004G06T2207/30132G06T7/11G06T7/136G06T7/62
Inventor 李雪连陈宇亮吕新潮叶峻宏崔之靖郭甲林
Owner CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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