01089579

Component

Megatexture corresponds to surface irregularities with wavelengths of a pavement profile lying between 50 mm and 500 mm and vertical amplitude ranging from 0,1 to 50 mm. The wavelength of megatexture is the same order of size as tire/road interface. Megatexture is measured by a profilometer called RUGO (mlpc device) composed of a non-contact sensor, which measure the distance between its datum-line and the pavement surface examined. Then, the profile curve is analyzed by digital filtering technique in order to determine the magnitude of its spectral components at different wavelength. Thus, the texture spectrum of the profile is calculated with a texture level, given in dB, for each one-third-octave band and each path of measurement. This study investigates elements that may affect megatexture measurements like the type of captor, the speed or the operator. Experiments were realized in order to evaluate the reproducibility and the repeatability of the megatexture measurements following the international standard ISO 5725. In the first part, the device used and the information relative to the megatexture measurements and indicators are described. In the second part, the statistical analysis results are exposed and the value of repeatability r and reproducibility R are given for each one-third-octave band.

01084478

08-2520

English

15p

2008

Transportation Research Board 87th Annual Meeting

DVD

Figures; References (6) ; Tables (4)

Defects; Pavement design; Pavement distress; Pavement maintenance; Pavement management systems; Profilometers; Rolling contact; Texture; Traffic noise

Pavement profile

Design; Highways; Pavements; I22: Design of Pavements, Railways and Guideways

Transportation Research Board Annual Meeting 2008 Paper #08-2520

TRIS, TRB

Jan 29 2008 4:55PM