Abstract This study investigates the potential utility of reused materials as an alternative material for commercial substrate and drainage layers. The performances of reused materials were assessed using turf with trays on a roof for two years in Chiba, Japan. Two types of materials, a commercial green roof substrate and cocopeat, were used as the substrate. For the drainage layers, five different materials were used: a commercial green roof drainage layer, bamboo stems and nodes, and polyethylene terephthalate (PET) bottle caps and bottoms. In addition, a sample without any drainage layer was used. The trays were prepared with the combination of these two substrates and six drainage applications. Overall, reused materials were observed to function well as commercial green roof materials. The turf in cocopeat was able to survive better than turf in commercial green roof substrate. In the drainage layers, some reused materials, such as the PET bottle caps and bamboo nodes, showed higher final plant coverage than commercial drainage layers in cocopeat. Our study has addressed the importance of realizing the original substrate and drainage layer using reused materials for developing sustainable and inexpensive green roofs.

中文翻译：

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日本广泛的绿色屋顶基材和排水层的新型应用和再利用材料 - 植物生长和水分吸收实施 -

摘要 本研究调查了再利用材料作为商业基材和排水层的替代材料的潜在效用。在日本千叶，使用带托盘的草皮在屋顶上评估了可再利用材料的性能两年。两种类型的材料，商业绿色屋顶基材和椰壳，用作基材。对于排水层，使用了五种不同的材料：商业绿色屋顶排水层、竹茎和竹节，以及聚对苯二甲酸乙二醇酯 (PET) 瓶盖和底部。此外，使用没有任何排水层的样品。托盘是用这两种基材和六种排水应用的组合制备的。总的来说，观察到重复使用的材料作为商业绿色屋顶材料发挥了良好的作用。cocopeat 中的草皮比商业绿色屋顶基质中的草皮更能存活。在排水层中，一些重复使用的材料，如 PET 瓶盖和竹节，在椰壳中显示出比商业排水层更高的最终植物覆盖率。我们的研究解决了使用再利用材料实现原始基材和排水层的重要性，以开发可持续且廉价的绿色屋顶。