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Asphalt pavement aging simulating method

A simulation method, technology of asphalt pavement, applied in the field of building materials

Active Publication Date: 2016-06-08
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Existing aging methods (such as TFOT, PAV, STOA, LTOA) mainly simulate the thermo-oxidative aging of asphalt and its mixture, but the aging of asphalt pavement is affected by temperature, load, ultraviolet radiation intensity, humidity, oxygen concentration, rainfall, etc. Multi-factor coupling effect, so it is necessary to seek a multi-factor aging simulation method

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0020] The asphalt pavement aging simulation is carried out by taking the pavement in service for one year in a certain area of ​​Hubei as an example. The asphalt layer thickness A of this road section is 20 mm, the annual average temperature is 16.3 °C, and the total annual ultraviolet radiation D is 1.83×10 8 J / m 2 , the ultraviolet radiation intensity C of the multifunctional pavement material life analyzer is 73W / m 2 , the service life n is 1; the maximum rainfall E is 280.6mm, the spray rainfall F of the multifunctional pavement material life analyzer is 80mm / d; the lane coefficient G is 0.4, the wheel track distribution coefficient H is 56.8%, the temperature The coefficient I is 0.417, the daily average traffic volume J is 20998, and the average axle load conversion coefficient K is 0.1237.

[0021] 1) Aggregate, mineral powder and SBS modified asphalt (asphalt ratio of 5.2) were weighed according to the commonly used gradation, and asphalt mixture rutting specimens we...

Embodiment 2

[0026] The asphalt pavement aging simulation is carried out by taking the pavement that has been in service for 2 years in a certain area of ​​Hubei as an example. The asphalt layer thickness A of this road section is 20mm, the annual average temperature is 16.3°C, and the total annual ultraviolet radiation D is 1.83×10 8 J / m 2 , the ultraviolet radiation intensity C of the multifunctional pavement material life analyzer is 73W / m 2 , the service life n is 2; the maximum rainfall E is 280.6mm, the spray rainfall F of the multifunctional pavement material life analyzer is 80mm / d; the lane coefficient G is 0.4, the wheel track distribution coefficient H is 56.8%, the temperature The coefficient I is 0.417, the daily average traffic volume J is 20998, and the average axle load conversion coefficient K is 0.1237.

[0027] 1) Aggregate, mineral powder and SBS modified asphalt (asphalt ratio of 5.2) were weighed according to the commonly used gradation, and asphalt mixture rutting s...

Embodiment 3

[0032] The asphalt pavement aging simulation is carried out by taking the pavement that has been in service for 3 years in a certain area of ​​Hubei as an example. The asphalt layer thickness A of this road section is 20mm, the annual average temperature is 16.3°C, and the total annual ultraviolet radiation D is 1.83×10 8 J / m 2 , the ultraviolet radiation intensity C of the multifunctional pavement material life analyzer is 73W / m 2 , the service life n is 3; the maximum rainfall E is 280.6mm, the spray rainfall F of the multi-functional pavement material life analyzer is 80mm / d; the lane coefficient G is 0.4, the wheel track distribution coefficient H is 56.8%, the temperature The coefficient I is 0.417, the daily average traffic volume J is 20998, and the average axle load conversion coefficient K is 0.1237.

[0033] 1) Aggregate, mineral powder and SBS modified asphalt (asphalt ratio of 5.2) were weighed according to the commonly used gradation, and asphalt mixture rutting ...

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Abstract

The invention discloses an asphalt pavement aging simulating method. The method comprises the following steps: inquiring the climate and communication information of the area to be simulated, according to the climate and communication information, calculating the rutting equivalent temperature, UV accelerating factor, raining accelerating factor, and rutting accelerating factor; according to the service life of the simulated pavement, calculating the rutting time, UV radiation time, and spraying time; putting a rutting member into a pavement material life-cycle analysis instrument, starting the pavement material life-cycle analysis instrument to obtain a simulated aged member; and according to the analysis of the multifunctional pavement material life-cycle analysis instrument on the aged member and the weights of aging factors (rutting equivalent temperature, UV accelerating factor, raining accelerating factor, and rutting accelerating factor), obtaining the aging index of simulated member. The aging mode is controlled by a plurality of factors, and thus the simulation is more close to the actual situation of asphalt pavement.

Description

technical field [0001] The invention relates to the field of building materials, in particular to an asphalt mixture aging simulation method. Background technique [0002] Asphalt pavement has been widely used in the construction of expressways in my country due to its characteristics of comfortable driving and short construction period. The rapid development of my country's economy promotes the growing prosperity of the transportation industry. With the rapid growth of traffic volume and traffic load, the life of asphalt pavement often does not reach the design period. At the same time, the climate and meteorological changes in various places are varied, and the factors affecting the performance of asphalt pavement during service are complex, resulting in frequent occurrence of asphalt pavement diseases and shortened service life. [0003] According to the study of the US Highway Strategic Research Program (SHRP), choosing a reasonable maintenance timing for asphalt paveme...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N33/42
Inventor 吴少鹏雷敏刘全涛赵之杰
Owner WUHAN UNIV OF TECH
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