Three-Dimensional (3D) texture measurement and pavement friction evaluation were conducted at the test-track of the Centre for Pavement and Transportation Technology at the University of Waterloo, Canada. The test-rack consists of 10 types of flexible and rigid pavement sections with various mixture designs. These experimental sections were subjected to frequent heavy truck loadings and harsh climatic conditions in Canada. This research was to quantify pavement surface texture in a 3D manner, to investigate pavement friction values, and to explore the relationship between pavement texture and friction.
Pavement texture was measured by using a line-laser scanner of which the accuracy of texture measurement was better than 0.05 mm. The advantage of the line-laser scanner was that pavement surface texture was recovered into 3D surface texture height maps and providing more realistic assessment of surface texture than two-dimensional profile methods. Discrete wavelet transform was selected in this study to break a measured 3D texture height map into its constituent parts to separate microtexture from macrotexture. A set of 3D texture indices were calculated for both macrotexture and microtexture.
Pavement friction was assessed by using a British Pendulum Tester. Statistical analysis was conducted to explore the relationship between 3D texture parameters and pavement friction values from the two devices. A significant relationship was developed between pavement texture and friction. These findings are essential to have a better understanding of the texture characteristics, pavement friction, and their relationship.
Contributors: Liu Q, Hossain S M K, Baaj H, Tighe S.
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