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Open AccessArticle

Detection of Dynamic Modulus and Crack Properties of Asphalt Pavement Using a Non-Destructive Ultrasonic Wave Method

1
School of Transportation, Southeast University, Nanjing 211189, China
2
College of Transportation Science and Engineering, Nanjing Tech University, Nanjing 210009, China
*
Authors to whom correspondence should be addressed.
Appl. Sci. 2019, 9(15), 2946; https://doi.org/10.3390/app9152946
Received: 15 June 2019 / Revised: 15 July 2019 / Accepted: 16 July 2019 / Published: 24 July 2019
(This article belongs to the Section Acoustics and Vibrations)
Non-destructive ultrasonic testing has attained popularity due to its robustness and cost-effectiveness in monitoring the structural health and performance evaluation of pavements, thus replacing traditional methods. This paper presents the application of an explicit finite element method for the modeling of ultrasonic wave propagation through asphalt concrete. Prior to modeling, non-destructive ultrasonic testing was conducted on four different types of asphalt concrete (AC-13, SMA-13, AC-20, and AM-20). Based on acoustic information (wave velocity) obtained in non-destructive testing (NDT) and density, the dynamic moduli of these asphalt concretes were evaluated and used in numerical modeling of ultrasonic wave propagation using the commercial software package ABAQUS. The ultrasonic wave results obtained by numerical modeling were compared with experimental results. This comparison showed a good fit between the finite element (FE) results and the experimental results and confirmed a good FE approach for ultrasonic wave propagation. In addition, the influence of varying dynamic moduli, density, varying location, and crack size/depth on ultrasonic wave propagation was analyzed. View Full-Text
Keywords: non-destructive ultrasonic testing; explicit finite element method; asphalt concrete; dynamic modulus; acoustic information non-destructive ultrasonic testing; explicit finite element method; asphalt concrete; dynamic modulus; acoustic information
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MDPI and ACS Style

Zhang, W.; Akber, M.A.; Hou, S.; Bian, J.; Zhang, D.; Le, Q. Detection of Dynamic Modulus and Crack Properties of Asphalt Pavement Using a Non-Destructive Ultrasonic Wave Method. Appl. Sci. 2019, 9, 2946.

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