This report is the second in a series describing the results of a project examining the effects of mechanical retexturing of road surfaces. It reports the work done to study the durability of four processes (scabbling, bush hammering, orthogonal flailed grooving and shot blasting) on a rolled asphalt surfacing. These were applied to both lanes of a length of dual carriageway trunk road in February 1994. The study compared the skidding resistance and texture depth of the retextured sections with untreated control sections at the time of treatment and, subsequently, through the summers of 1994, 1995 and 1996. It was found that all four processes improved skidding resistance compared to the control sections and some improvement was still in evidence at the end of the thirty-two month trial. The scabbling and bush-hammering reduced the texture depth. (A)
Samenvatting