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A test method for void clogging of porous asphalt mixture

A technology of asphalt mixture and test method, which is applied in the direction of analysis of suspension and porous material, preparation of test samples, measurement device, etc., can solve problems such as clogging of dust particles in voids, achieve improved effect, be easy to implement, and be well popularized and utilized value effect

Active Publication Date: 2016-06-08
SOUTHEAST UNIV
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Problems solved by technology

[0005] However, because the porous asphalt mixture itself adopts a large void structure, the voids are easily affected by the blockage of dust particles during use. The void blockage is a more prominent problem of porous asphalt pavement compared with traditional asphalt pavement.

Method used

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  • A test method for void clogging of porous asphalt mixture
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  • A test method for void clogging of porous asphalt mixture

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Embodiment 1

[0039] A porous asphalt mixture pore blocking test method of the present invention has been well tested and verified. The project supported by the test is the porous asphalt pavement section laid between pile numbers K2+900-K3+300 on the south side of Wuzhou Avenue in Shanghai. The porous mixture was mixed indoors and formed according to the designed asphalt ratio, gradation and target design void ratio. Specimen. Apply the test method of this experiment to analyze the clogging of the gaps by different sizes of clogging dust particles. The specific implementation steps are as follows:

[0040] Step 1: According to the asphalt ratio and gradation of the porous asphalt mixture, according to the T0702-2011 compaction method in the "Test Regulations for Asphalt and Asphalt Mixtures in Highway Engineering" JTGE20-2011, indoor mixing to produce porous asphalt mixture and molding standard Marshall test The design gradation, asphalt ratio and target design void ratio used are shown i...

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Abstract

The invention discloses a porous asphalt mixture void blocking test method. Firstly, according to the design gradation and asphalt ratio of the actual road surface, the porous asphalt mixture is mixed indoors to form a test piece, and the lower surface of the test piece is sealed with wax. Then spread the blocking dust evenly on the upper surface, and use the scour tester to scour the upper surface of the specimen according to the pressure of the wheel load on the road surface corresponding to the actual road speed. The mass of blocking dust that is blocked inside the specimen is obtained by removing the mass of blocking dust carried away by the water flow and the mass of blocking dust remaining on the upper surface from the total mass of blocking dust that is paved. The method of the present invention can not only scientifically evaluate the clogging of porous asphalt pavement by clogging dust particles of different sizes, and provide a good basis for pavement cleaning and maintenance, but also can analyze the impact of different conditions such as void ratio, vehicle speed, and clogging dust particle size on porous asphalt pavement. The effect of pavement blockage can provide a reasonable reference for the optimization of pavement maintenance and improve the effect of cleaning and maintenance.

Description

technical field [0001] The invention relates to the technical field of highway asphalt pavement maintenance, in particular to a method for void blocking test of porous asphalt mixture. Background technique [0002] Porous asphalt pavement (Porous asphalt pavement) uses asphalt mixture with a large void ratio for the pavement surface as a drainage layer, and lays a densely graded mixture under it as an impermeable layer, and sets a waterproof adhesive between the drainage layer and the impermeable layer. The pavement structure of the junction layer. The porosity of the porous asphalt mixture used in this pavement structure is generally between 18% and 25%. Discontinuous gradation is adopted to form a larger porosity and more connected voids in the mixture, so that the rainwater on the pavement can be quickly discharged. , improve the drainage performance of the pavement. [0003] Porous asphalt pavement originated in Germany. In 1960, Germany first used this material to bui...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N1/28G01N15/08
Inventor 马涛梁彦龙黄晓明张垚赵晨李靖
Owner SOUTHEAST UNIV
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