Laboratory studies indicate that municipal solid waste incineration (MSWI) bottom ash (BA) can serve as a suitable road base material. However, very little is known about how field-scale design variables, such as layer thickness and compaction effort, and changes in moisture content over time affect the long-term performance of MSWI BA base courses. Understanding how these parameters affect the physical performance of BA base courses is necessary for developing construction specifications and guidelines specific to this material – a critical step in promoting widespread reuse practices. In this study, processed MSWI BA aggregate was tested in a field-scale test facility that replicated real-world scenarios to examine their effects on two important material properties: resilient modulus and permanent deformation. These results suggest that layer thickness, compaction effort, and moisture content can affect the base layer's resilient modulus and the permanent deformation, with moisture content having the most significant impact. Moisture content above the material's optimum decreased base modulus and increased permanent deformation, but the degree of deformation proportionally decreased with increasing layer thickness. Based on these results, guidelines on designing and reusing MSWI BA as a base course are discussed, suggesting optimal performance from highly compacted, thicker layers while stressing a need for tight control of moisture during and post-construction.

实验室研究表明，城市垃圾焚烧（MSWI）底灰（BA）可以用作合适的路基材料。但是，人们对于田间规模的设计变量（例如层厚度和压实强度以及水分随时间的变化）如何影响MSWI BA基础课程的长期性能知之甚少。了解这些参数如何影响文学学士学位基础课程的物理性能，对于制定针对该材料的施工规范和指南是必要的，这是促进广泛使用方法的关键一步。在这项研究中，已处理的MSWI BA骨料在现场规模的测试设施中进行了测试，该设施复制了真实世界的场景，以检查其对两种重要材料性能的影响：弹性模量和永久变形。这些结果表明，层厚度，压实强度和水分含量会影响基层的弹性模量和永久变形，其中水分含量影响最大。高于材料最佳值的水分含量会降低基础模量并增加永久变形，但变形程度会随着层厚度的增加而成比例地降低。基于这些结果，讨论了有关设计和重新使用MSWI BA作为基础课程的指南，提出了高度压实，较厚的层的最佳性能，同时强调在施工期间和施工后需要严格控制水分。高于材料最佳值的水分含量会降低基础模量并增加永久变形，但变形程度会随着层厚度的增加而成比例地降低。基于这些结果，讨论了有关设计和重新使用MSWI BA作为基础课程的指南，提出了高度压实，较厚的层的最佳性能，同时强调在施工期间和施工后需要严格控制水分。高于材料最佳值的水分含量会降低基础模量并增加永久变形，但变形程度会随着层厚度的增加而成比例地降低。基于这些结果，讨论了有关设计和重新使用MSWI BA作为基础课程的指南，提出了高度压实，较厚的层的最佳性能，同时强调在施工期间和施工后需要严格控制水分。