On site photometric characterisation of cement concrete pavements with coluroute device

The standard tool for characterizing road surface photometry is the reduced luminance coefficient table (or R-table), as defined in the seventies by the CIE. Since these tables are no longer representative, measuring road photometry is necessary for optimizing a lighting installation and ensuring luminance level and uniformity. The objective of the study was to characterise and follow on site the photometric characteristics of different concretes with time and traffic. A first experiment was done with two concrete formulations (broomed and water jet scrubbed concrete) located around a much circulated concrete mixer plant. The photometric characterization of these pavements was done with the portable reflectometer COLUROUTE device during three years. The selected surface treatment was applied in a tunnel and the photometric characteristics were measured during 30 months. It was shown that the concrete pavements are more diffuse and clear than classical pavements. Their use could generate significant energy saving. © 2018, LLC Editorial of Journal "Light Technik". All rights reserved.