THE POLLUTION OF EFFLUENTS FROM PERVIOUS PAVEMENTS OF AN EXPERIMENTALHIGHWAY SECTION - 1ST RESULTS

The use of pervious pavements as covering materials for streets has in creased. The reason for the use of such pavements is their ability to minimise noise, aquaplaning and water spreading by tyres during rainfa ll events. Two years ago the province of Baden-Wurttemberg constructed an experimental highway section to obtain information about the noise -decreasing effects as well as the influence of winter maintenance on the physical behaviour of porous road pavements. In parallel, at the e nd of 1989 investigations were begun to examine the chemical propertie s of the drainage water passing through the upper 40 mm of the perviou s layer (porous asphalt) with a porosity of up to 20 vol%.