... 0mm width, 1.0m length, 10.0m or 7.5m or 8.0m finished, PE film, mineral, ... : base materials are firstly dipped into asphalt or thermoplastic elastomer (e.g. SBS), thermoplastics ( ... or polyethylene memb ranes are spread or covered on its upper surface; fine sands or polyethylene membranes are spread or ... to15%, spread in the direction parallel with or vertical to ridge; when gradient slope is bigger ...