Onderwerp: Bezoek-historie

A safe method for monitoring raveling of porous asphalt surfaces using laser

Dit onderwerp bevat de volgende rubrieken.


Ministry of Transport, Public Works and Water Management, Road and Hydraulic Engineering Division = Ministerie van Verkeer en Waterstaat, Rijkswaterstaat, Dienst Weg- en Waterbouwkunde (RWS, DWW); by E. Vos and M. Pinkse



A research project has been carried out with the aim of developing a method for obtaining and recording data on the amount and severity of the raveling caused by traffic on the Dutch motorways with porous asphalt surfacings. At present, the degradation by raveling is evaluated by visual inspection of the motorway from the hard shoulder, which is an unsafe method of inspection. The basic idea behind the new automated procedure is to use the?texture profile? as measured by the ARAN laser system. To that end two models have been developed. One is based on the average texture depth (MTD) and the other on a more or less direct calculation of the number of holes (STONEWAY) in the surface. Both models have been adjusted by using the data on the visual inspections present in the SHRP-NL database. For road sections with moderate or severe raveling along less than 15 % of the entire section, the STONEWAY model provides a precise and repeatable prediction. For road sections with moderate or severe raveling along a greater percentage of the total length, the precision is somewhat less but still acceptable. The research will be continued and the focus will then be on testing the model in everyday practice and on using the results to predict remaining road life span. If the model proves to be successful within a period of 1 to 2 years, then the pavement management system will be able to rely on data that are objective and are collected safely.



10 p.

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