The development of performance tests for thin and ultra-thin layers

This project subsidized by the Belgian Bureau for Standardization NBN (1st October 2008 – 30th September 2012) was devoted to the development of performance tests for thin and ultra-thin asphalt layers (with a thickness ranging between 10 and 30 mm), which are increasingly used in Belgium and in other European countries. The research effort related directly to a priority set by European standardization committee CEN TC227/WG1, which intends to develop performance tests and performance specifications for all types of asphalt mixture, and to the finalization of ETAG 16, which describes European guidelines for ultra-thin layers. Several test sections (including those with low-noise surface courses on regional road N19 at Turnhout-Kasterlee) were monitored within this project, to validate the test methods.