Given the proliferation in the last decade of roads with porous asphalt surface layers, the concern of the Spanish Road Network Administration insofar as maintenance and repair works in order to meet the growing demands of drivers and neighbours is ever greater. In this paper the maintenance works carried out on the A-52 Rias Bajas motorway by the Public Works Ministry's State Road Network Unit in Ourense are analysed. The work carried out has consisted on the one hand of the auscultation of the road surface of the motorway mentioned above carried out over a three-year period in order to measure the skid-resistance coefficient, the surface texture and the on-site permeability of the draining surface layer and its evolution throughout time. The surface of the motorway was also repaired several times by means of repair methods that did not reduce the values of skid resistance, texture and on-site permeability obtained. In this paper, the results obtained from the auscultation measurements will be developed. The repair methods, which depend as much on the volume of surface to be repaired as well as the conditions of use of the road, will also be carried out. Lastly, a comparison between both methods will be made, studying the texture and permeability of the repairs carried out, recommending a porous asphalt surface layer repair method which respects the initial parameters of the layer of the wearing surface layer in order to meet drivers' comfort and safety needs. For the covering abstract see ITRD E135448.
Abstract