Method for evaluating anti-clogging performance of porous asphalt mixture

Abstract

The invention discloses a method for evaluating anti-clogging performance of a porous asphalt mixture. According to the method, a horizontal or vertical cross-section image of a test piece is acquired by the adoption of CT scan equipment. Image software is applied to process the acquired CT image, including threshold processing, gap fitting, gap area and quantity statistics and the like. Cross-section image information, mainly including cross-section average gap quantity, cross-section gap gross area and average single gap area, can be calculated. Quantitative evaluation can be carried out on the anti-clogging performance of the porous asphalt mixture test piece according to a parameter value of the average single gap area. The larger the average single gap area value, the better the anti-clogging performance of the mixture; and the smaller the average single gap area value, the poorer the anti-clogging performance of the mixture. The method provided by the invention can be used to evaluate the anti-clogging performance of the porous asphalt mixture, thus comparing and selecting porous asphalt mixtures of different materials from the angle of prolonging service function of pavement.

Description

technical field [0001] The invention relates to an evaluation method, in particular to an evaluation method for the anti-clogging performance of porous asphalt mixture. Background technique [0002] Porous asphalt concrete (PAC), as an environmentally friendly pavement material, has many advantages such as drainage, noise reduction, anti-skid, safety, etc., and has been more and more widely used in pavement engineering. Different from the conventional compact asphalt mixture, the porous asphalt mixture has a skeleton void structure with a porosity of about 20%. During long-term use, there is a problem of clogging the voids, resulting in the attenuation of the pavement function. [0003] Porous asphalt mixtures composed of different materials have large differences in the size and spatial distribution of microscopic voids, resulting in differences in the anti-clogging performance of porous asphalt mixtures. The anti-clogging performance of porous asphalt mixture has a direct...

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Problems solved by technology

[0004] In the current porous asphalt mixture evaluation system, there is no relevant method related to the evaluation of the anti-clogging performance of the mixture. Therefore, in the design and comparison of the mixture, there is no way to optimize the porous asphalt mixture with good anti-clogging performance. Therefore, for porous asphalt mixture Research on the evaluation method of anti-clogging performance of asphalt mixture is one of the topics concerned by those skilled in the art

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