Highways Agency Report

             Shelfmark: SSR/TRL/WP74
       Personal author: Nicholls, J C
                 Title: Removng detritus from pervious macadam by mechancal
                        means
             Publisher: Transport and Road Research Laboratory, 1991
  Physical description: 8p.
                 Price: Unpriced
                Series: Working Paper: WP/MC/17
       Notes - general: An earlier trial had shown that pervious macadam
                        cannot be effectively cleared of detrtus in the vods
                        by mechanical meansafter severn years trafficking.
                        This trial was carried out on a two year old stretch
                        of pervious macadam which showed that there is only
                        minimal improvement after a single pass at 50 bar, but
                        that the hydraulic conductivity was increased by about
                        27% after three passes.  The use of a hand-held jet at
                        100 bar showed greater improvements, but the effect of
                        using the  equipment at higher pressures, including
                        its potentila for damaging the surfacing, needs to be
                        assessed.
               Keyword: Detrital rock
               Keyword: Macadam
 TRRL WORKING PAPER
  copy:1       id:54046000300093      library:SSR          location:SSR-SHELF