A green roof is composed of a substrate and drainage layers which are fixed on insulation material and roof structure. The global heat resistance (Rc) within a green roof is affected by the humidity content of the substrate layer in which the coarse recycled materials can be used. Moreover, the utilization of recycled coarse aggregates such as incinerated municipal solid waste aggregate (IMSWA) for the drainage layer would be a promising solution, increasing the recycling of secondary resources and saving natural resources. Therefore, this paper aims to investigate the heat transfer across green roof systems with a drainage layer of IMSWA and a substrate layer including recycled tiles and bricks in wet and dry states according to ISO-conversion method. Based on the results, water easily flows through the IMSWAs with a size of 7 mm. Meanwhile, the Rc-value of the green roof system with the dry substrate (1.26 m² K/W) was 1.7 times more than that of the green roof system with the unsaturated substrate (0.735 m² K/W). This means that the presence of air-spaces in the dry substrate provided more heat resistance, positively contributing to heat transfer decrease, which is also dependent on the drainage effect of IMSWA. In addition, the Rc-value of the dry substrate layer was about twice that of IMSWA as the drainage layer. No significant difference was observed between the Rc-values of the unsaturated substrate layer and the IMSWA layer.

中文翻译：

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使用焚烧的城市固体废物集料进行屋顶绿化的传热测量

屋顶绿化是由固定在保温材料和屋顶结构上的基层和排水层组成。绿色屋顶内的整体耐热性 (Rc) 受可使用粗再生材料的基材层的湿度影响。此外，在排水层中使用回收的粗骨料，如城市固体垃圾焚烧骨料（IMSWA），将是一个有前景的解决方案，增加二次资源的回收利用，节约自然资源。因此，本文旨在根据 ISO 转换方法研究具有 IMSWA 排水层和包括再生瓦片和干湿状态砖的基材层的绿色屋顶系统的传热。根据结果​​，水很容易流过尺寸为 7 毫米的 IMSWA。同时，² K/W) 是具有不饱和基材的绿色屋顶系统 (0.735 m ² K/W) 的1.7 倍。这意味着干燥基材中空气空间的存在提供了更多的耐热性，积极地降低了传热，这也取决于 IMSWA 的排水效果。此外，干基材层的 Rc 值约为 IMSWA 作为排水层的两倍。在不饱和基材层和 IMSWA 层的 Rc 值之间没有观察到显着差异。