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Method for determining asphalt amount of porous asphalt mixture

A technology for asphalt mixture and asphalt dosage, which is applied in the field of determining the optimal asphalt dosage of porous asphalt mixture, can solve the problems of random asphalt dosage or human factors, and achieve the effect of eliminating subjectivity and avoiding arbitrariness

Inactive Publication Date: 2012-06-27
CHANGAN UNIV
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Problems solved by technology

This will easily lead to arbitrary or human factors affecting the determination of the specific optimal asphalt dosage
[0008] To sum up, there is still room for improvement in the determination method of the optimal asphalt content of porous asphalt mixture in my country's current specifications

Method used

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  • Method for determining asphalt amount of porous asphalt mixture
  • Method for determining asphalt amount of porous asphalt mixture
  • Method for determining asphalt amount of porous asphalt mixture

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Embodiment Construction

[0024] This embodiment provides a method for determining the optimal asphalt dosage of a porous asphalt mixture, which is carried out according to the following steps:

[0025] Step 1: Make the relationship curve between the scattering loss and the leakage amount and the amount of asphalt according to the scattering and leakage test;

[0026] Step 2: Mark the control standard of scattering loss and leakage amount in the figure, that is, mark the horizontal line where scattering loss does not exceed 15% and leakage amount does not exceed 0.3%;

[0027] Step 3: The asphalt dosage corresponding to the intersection point of the horizontal line with 15% flying loss and the scattering curve is the minimum bitumen dosage OAC min ; Similarly, the maximum asphalt consumption OAC is the maximum asphalt consumption corresponding to the intersection of the horizontal line with a leakage rate of 0.3% and the leakage curve max , according to the obtained maximum and minimum asphalt dosage ...

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Abstract

The invention discloses a method for determining the asphalt amount of a porous asphalt mixture. According to the method, the asphalt amount range limit of the porous asphalt mixture is determined through raveling and drain-down tests. In dependence on the result of the raveling test, the corresponding asphalt amount when the raveling loss is 15% is taken as the minimum asphalt amount OACmin, andthe corresponding asphalt amount when the drain-down loss is 0.3% is taken as the maximum asphalt amount OACmax. Based on the above situation and in dependence on the performance test result and structural characteristics of the mixture, the best asphalt amount of the porous asphalt mixture is calculated according to the formula OAC=OACmin+0.75(OACmax-OACmin). When OACmax exceeds 6.0%, 6.0% is used; and when OACmin is less than 4.0%, 4.0% is used. If there exist no intersection interval of OACmin and OACmax according to the raveling and drain-down tests, it shows that the material compositiondesign of the mixture is not reasonable and the material composition needs designing again. The method provided by the invention can be used to objectively and accurately determine the best asphalt amount of the porous asphalt mixture.

Description

technical field [0001] The invention belongs to the field of pavement material design, and relates to a method for determining the amount of asphalt, in particular to a method for determining the optimal amount of asphalt for a porous asphalt mixture. Background technique [0002] Porous asphalt mixture is a kind of asphalt mixture with a porosity of about 20%. This pavement material with open gradation and large void structure has many advantages. Firstly, the porous asphalt mixture can absorb the noise generated by vehicles, which is about 3dB lower than that of ordinary asphalt mixture; secondly, the porous asphalt mixture pavement has no water accumulation in rainy days, which greatly improves the anti-skid performance and prevents water drift accidents , to reduce splashing and spraying behind the vehicle; in addition, the porous asphalt pavement also has good visual performance and safety and comfort, and can improve the fuel efficiency of the vehicle. Therefore, por...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B26/26
Inventor 蒋玮肖晶晶沙爱民王振军裴建中邹晓龙李荣
Owner CHANGAN UNIV
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