Three-dimensional laser profilometer survey system of pavement slip characteristics
XU Li1, GUO Runhua2, PENG Huiting1, SHI Pengcheng2
1. College of Construction Engineering, Xinjiang University, Urumqi 830047, China; 2. Department of Civil Engineering, Tsinghua University, Beijing 100084, China
Abstract：A 3D laser profilometer was used to measure the average height (Ra), average section depth (MPD), average structure depth (MTD), root mean square height (Rq), peak volume (Vmp), wavelength (λ), and two-dimensional power spectral density (PSD) of eight asphalt pavements. The results show that the anti-slip characteristics correlate with Ra, MPD, and MTD with over 80% correlation. PSD decreases with increasing wave vector q, which can also be used to independently evaluate the anti-skid characteristics of the pavement. The micro- and macro-texture wavelengths of the AC13 and AC16 series samples mainly range from 0-3 mm, with the texture band below 1 mm correlating positively with the anti-slip characteristics with up to 80% correlation, with less correlation in the 1-1.25 mm band, and even less in the 1.25-2.5 mm band. Rutting reduces the roughness as seen in the lower PSD than for the original pavement.
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2021, Vol. 61 
