ABSTRACT

Recycled waste materials are increasingly being used as low carbon construction materials in civil infrastructure works, as recycled materials have significant carbon savings compared with virgin quarried materials. In this research, the stiffness and modulus of rupture properties of crushed rock (CR) blended with recycled glass (RG) were evaluated. The engineering properties of the four cement-treated CR/RG blends evaluated were: 100% CR100 (100CR), 90% CR with 10% RG (CR90/RG10), 80% CR with 20% RG (CR80/RG20), 70% CR with 30% RG (CR70/RG30). 3% dosage of general blend (GB) cement was used in all the RG/ CR blends. The results indicated that cement-treated RG/CR blends, with up to 20% RG, are suitable as pavement subbase materials. Unconfined compression strength (UCS) values met the minimum requirement for 7 days of curing for all the CR/RG blends. The results of repeated load triaxial (RLT) tests and flexural beam tests were found to be within the ranges reported for the previous testing on other accepted recycled and quarry products. Based on this laboratory assessment, RG can be recommended for incorporation as a supplementary material in cement-treated CR pavement applications, which will increase the uptake of recycled products as a civil engineering construction material.

摘要

回收废料越来越多地被用作民用基础设施工程的低碳建筑材料，因为与原始采石材料相比，回收材料具有显着的碳减排效果。在这项研究中，评估了与再生玻璃 (RG) 混合的碎石 (CR) 的刚度和断裂模量。评估的四种水泥处理的 CR/RG 混合物的工程性能为：100% CR100 (100CR)、90% CR 和 10% RG (CR90/RG10)、80% CR 和 20% RG (CR80/RG20)、70 % CR 与 30% RG (CR70/RG30)。在所有 RG/CR 混合物中使用了 3% 的普通混合物 (GB) 水泥。结果表明，经水泥处理的 RG/CR 混合物，具有高达 20% 的 RG，适合用作路面底基层材料。无侧限抗压强度 (UCS) 值满足所有 CR/RG 共混物固化 7 天的最低要求。重复负载三轴 (RLT) 测试和弯曲梁测试的结果被发现在之前对其他可接受的回收和采石产品的测试报告的范围内。根据该实验室评估，可推荐将 RG 作为补充材料掺入经水泥处理的 CR 路面应用中，这将增加回收产品作为土木工程建筑材料的使用率。