Abstract Tire derived aggregate (TDA) is currently being used as a cost-effective substitute for gravel in landfill leachate collection systems. TDA is composed of tires that have been shredded into pieces. However, the particles often contain a small portion of high risk protruding wires that may puncture a geomembrane placed below the TDA. The chance that these wires puncture is a function of the number of wires present in a sample, how the particles land, and the efficiency of the protection layer to prevent punctures. Using heavier nonwoven geotextile protection layers with larger size TDA and thicker geomembranes, the number of punctures may be expected to be fewer than 20 per hectare for the materials tested in this study. A second component to long term geomembrane performance is the presence of localised zones of high strain resulting from the point loading on the geomembrane. The strain resulting from TDA was found to be less than the strain which occurred from gravel using the same protection layers. It is concluded that, for different reasons, gravel and TDA both require effective protection layers of soil or heavy nonwoven geotextile to ensure long-term performance.

中文翻译：

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轮胎衍生骨料对土工膜衬里的损坏

摘要 轮胎衍生骨料 (TDA) 目前被用作垃圾渗滤液收集系统中砾石的经济有效的替代品。TDA 由切碎的轮胎组成。然而，颗粒通常包含一小部分高风险的突出线，可能会刺穿放置在 TDA 下方的土工膜。这些导线被刺穿的几率取决于样品中存在的导线数量、颗粒如何着陆以及保护层防止刺穿的效率。使用具有更大尺寸 TDA 和更厚土工膜的较重的非织造土工布保护层，本研究中测试的材料的穿刺次数可能少于每公顷 20 次。土工膜长期性能的第二个组成部分是存在由土工膜上的点载荷引起的局部高应变区。发现 TDA 产生的应变小于使用相同保护层的砾石产生的应变。结论是，由于不同的原因，砾石和 TDA 都需要有效的土壤保护层或重型非织造土工布，以确保长期性能。