| 摘要 |
<p>A composite material 10 for use as a landfill liner comprises a drainage layer 12 defining at least one flow path located between and bonded to permeable support sheets 16, 18 and a cushioning layer 20 located adjacent to one of the support sheets. The drainage layer 12 is an open cell mesh structure comprising spaced parallel first mesh elements 30 and second mesh elements 32 disposed transverse to the first mesh elements to define apertures. The preferred drainage layer 12 includes parallel third mesh elements disposed transverse to the first and second mesh elements. The support sheets may be textiles formed of plastics material such as polypropylene having apertures for fluid passage between warp and weft fibres 26, 28. The cushioning layer may be permeable geotextile material, such as needle punched polypropylene. The composite material has the advantage of reducing the amount of gravel required when lining a hole for landfill.</p> |
