Homogeneity Assessment of Asphalt Concrete Base in Terms of a Three-Dimensional Air-Launched Ground Penetrating Radar

Coatings

Guiling Hu¹  Luchuan Chen²  Zhichao Xue³  Wenyang Han⁴  Xiangpeng Yan⁴  Xiaomeng Zhang⁴  Jincheng Wei⁴  Zhengchao Zhang⁴ 

[1] School of Transportation Engineering, Shandong Jianzhu University, Jinan 250101, China;Shandong Hi-Speed Group Co., Ltd., Jinan 250101, China;Shandong Hi-Speed Infrastructure Construction Co., Ltd., Jinan 250101, China;Shandong Transportation Institute, Jinan 250101, China;

关键词: ground penetrating radar;    asphalt concrete base;    homogeneity assessment;    dielectric constant;    model;   

DOI  :  10.3390/coatings11111398

来源: DOAJ

【 摘 要 】

Obtaining the required homogeneity, including uniform thickness and density, is very crucial for controlling the quality of flexible asphalt layers. Although non-destructive testing (NDT) methods are time-saving and less labor-intensive, they only provide indirect measurement data under testing area conditions and strongly depend on the explanations by prediction models. In this study, in terms of the three-dimensional air-launched Ground Penetrating Radar (GPR) technique, the dielectric constant of asphalt concrete base with dry conditions in pavements was detected and calculated by different methods (the Coring Method, Reflection Amplitudes Method and Common Mid-Point Method). According to the calculated dielectric constant, the thickness and density of asphalt concrete base were further calculated and assessed. Comparing with the Coring Method, the Common Mid-Point Method was recommended to calculate dielectric constants in order to obtain reliable thickness of asphalt pavement base. Among the Birefringence, Boettcher, Linearity indicator, and Rayleigh models, the Rayleigh model was suggested to predict the density, and the predicted density exhibited a good correlation coefficient with the measured one. Furthermore, by choosing these proper calculation methods, an assessment was successfully conducted to evaluate homogeneity of a constructed field pavement in practice.

【 授权许可】

Unknown