Method for evaluating uniformity of recycled asphalt

A technology of recycled asphalt and evaluation method, which is applied in the fields of material analysis, material analysis by optical means, image data processing, etc. It can solve the problems of failure to evaluate the mixing uniformity of new and old materials, and single evaluation angle of uniformity.

Active Publication Date: 2019-09-06
CHANGSHA UNIVERSITY OF SCIENCE AND TECHNOLOGY
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  • 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

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  • Method for evaluating uniformity of recycled asphalt
  • Method for evaluating uniformity of recycled asphalt
  • Method for evaluating uniformity of recycled asphalt

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Embodiment

[0164] A method for evaluating the uniformity 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: 4cm modified asphalt AC-13 for overlay layer + 4cm modified asphalt AC-16(I) for upper layer + 5cm modified asphalt AC-25(I) for middle surface layer ) + the lower layer of 6cm asphalt-stabilized crushed stone AM-25 + the base layer of 20cm of cement-stabilized crushed stone (6%) + the sub-layer of 20cm of cement-stabilized crushed stone (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 Cement Co., Ltd. Mineral powder.

[0168] Form Marshall test pieces according to the design gradation; suc...

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Abstract

The invention discloses a method for evaluating the uniformity of recycled asphalt. The method employs three uniformity evaluation indexes for aggregate distribution uniformity evaluation based on equal-area ring fan division, new aggregate distribution uniformity evaluation based on a particle position and area, and pore distribution uniformity evaluation based on a cross-sectional voidage. Compared with the commonly used asphalt concrete uniformity evaluation index, the method for evaluating the uniformity of recycled asphalt has the following advantage: the uniformity is evaluated from three aspects of new and old aggregates, new aggregates and pore space, so that the accuracy is high.

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 Applications(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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