Method for determining anti-clogging performance of porous asphalt mixture

Abstract

The invention discloses a method for determining the anti-clogging performance of a porous asphalt mixture. The method comprises the following steps: adopting a compactness molding standard Marshall test piece; determining the water seepage coefficient of a porous asphalt mixture test piece by adopting the corresponding water seepage coefficient measuring device under the condition of not demoulding; scattering fine material at a certain amount and grading uniformly at the top of the test piece; filtering by uniformly spraying a certain amount of water; shaking the test piece while filtering; testing the residual water seepage coefficient after filtering; calculating the ratio of the residual water seepage coefficient of the test piece after the fine materials are scattered to the initial water seepage coefficient of the test piece before the fine materials are scattered; and defining the ratio as residual water seepage capability. The anti-clogging performance of the mixture is better when the ratio is larger, and otherwise, the anti-clogging performance is worse. By utilizing the method provided by the invention, the anti-clogging performance of the porous asphalt mixture is determined, thus the porous asphalt mixture composed of different materials can be optimally selected from the view of prolonging the use function of the pavement.

Description

technical field [0001] The invention relates to a method for measuring, in particular to a method for measuring the anti-clogging performance of porous asphalt mixture. Background technique [0002] Porous asphalt mixture is a kind of open-graded asphalt mixture with interconnected voids and a porosity of about 20%. It has been widely used in high-grade asphalt pavement in my country for its remarkable drainage, noise reduction effect and excellent skid resistance. application. The skeletal void structure of porous asphalt mixture provides pavement drainage, noise reduction and anti-skid functions, but there is a problem of void clogging during long-term use, resulting in attenuation of pavement functions. [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...

AI Technical Summary

Problems solved by technology

[0004] In the current measurement system of porous asphalt mixture, there is no relevant method related to the anti-clogging performance test 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 Research on the determination method of anti-clogging performance of porous asphalt mixture is one of the topics concerned by those skilled in the art

Images