Henan Gaoyuan Maintenance Technology of Highway Co.

Xinxiang, China

Henan Gaoyuan Maintenance Technology of Highway Co.

Xinxiang, China
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Wang D.,South China University of Technology | Shi J.,South China University of Technology | Shi J.,Henan Gaoyuan Maintenance Technology of Highway Co.
IOP Conference Series: Earth and Environmental Science | Year: 2017

In order to non-destructive test (NDT) the permeability coefficient of hot mix asphalt (HMA) pavements fast, A methodology for assessing the permeability coefficient was proposed by infrared differential thermal testing of pavement after rain. The relationship between permeability coefficient and air voids of HMA specimen deter-mined. Finite element method (FEM) models were built to calculate the surface temperature difference with different exposure time after precipitation. Simulated solar radiation source and fully saturated plate specimens were set in laboratory, tests verify that the different exposure time the specimen surface temperature difference. Infrared differential thermal detection permeable pavement hardware and corresponding software developed. Based on many test results, the evaluation index and criteria of permeability coefficient of HMA pavements tested by infrared differential thermal were developed. The results showed that: There is correlation between air voids and permeability coefficient of HMA specimen. Permeability coefficient of HMA pavements can be determined by different surface temperature at different exposure time. 9:00 am - 14:00 pm is the best time to detect permeability coefficient by infrared differential thermal NDT. Permeable asphalt pavement permeability can be achieved by infrared detector quickly and continuously, a lane testing; Per the permeable assessment criteria, in-place pavements permeability coefficients can be accurately evaluated. © Published under licence by IOP Publishing Ltd.


Shi J.-C.,South China University of Technology | Shi J.-C.,Henan Gaoyuan Maintenance Technology of Highway Co. | Hou S.-G.,Henan Gaoyuan Maintenance Technology of Highway Co. | Li Z.-Y.,Henan Gaoyuan Maintenance Technology of Highway Co. | And 2 more authors.
Zhongguo Gonglu Xuebao/China Journal of Highway and Transport | Year: 2014

In order to rapidly detect the permeability coefficient of dense-graded asphalt mixture, a new evaluation approach for pavement permeability coefficient was proposed based on road surface temperature difference. The relationship of asphalt mixture void ratio and permeability coefficient was analyzed. Under the same irradiation conditions the quantities of water lost, water loss rates and surface temperature differences of asphalt mixture specimens with different permeability coefficients were studied by indoor tests. The saturated road surface temperature variation with solar radiation was calculated through numerical simulation. The impact of the season on surface temperature different was analyzed. Also, the numerical results and the indoor test results were compared. The results show that after a period of time under the indoor simulated solar radiation, the surface temperature difference of saturated road gradually increases with the increase of permeability, and the maximum surface temperature difference is 5.7℃. The solar radiation intensity is directly related with the road surface temperature difference. The best evaluation period is between 9:00 AM and 2:00 PM. In summer the road surface temperature difference is the biggest and the summer is the best season to evaluate the permeability coefficient. ©, 2014, Xi'an Highway University. All right reserved.

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