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Abstract
This study aims to introduce the use of 3D-digital image correlation (DIC) to the in situ testing of pavements and to support the development of techniques for a rapid evaluation of the conservation status of existing roads. Little research was found on this topic. The passage of a car wheel on an asphalt pavement was adopted as a case study. The DIC measurements were compared to those gathered by contact sensors. From a qualitative point of view, the DIC measurements captured the realistic shape of a deflection basin. From a quantitative point of view, the deflection values provided by the DIC system had a mean error of 0.015 mm and a standard deviation of 0.011 mm. At the moment of highest load, these errors had a mean value and standard deviation of − 0.016 mm and 0.021 mm, respectively. Thus, to improve the accuracy of the system, we propose modifying the camera support, speckle pattern, and control of natural light.
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Details
1 University of Santiago de Compostela, Higher Polytechnic School (Lugo), CIGEO – Civil and Geomatics Research Group, Agroforestry Engineering Department, Lugo, Spain (GRID:grid.11794.3a) (ISNI:0000000109410645)
2 University of Santiago de Compostela, Higher Polytechnic School (Lugo), PEMADE – Research Platform on Structural Wood Engineering, Agroforestry Engineering Department, Lugo, Spain (GRID:grid.11794.3a) (ISNI:0000000109410645)
3 Department of R+D+I of Misturas, S.A., Orense, Spain (GRID:grid.11794.3a)