Maghool Farshid, Senanayake Muditha, Arulrajah Arul, Horpibulsuk Suksun
Department of Civil and Construction Engineering, Swinburne University of Technology, Melbourne 3122, Australia.
School of Civil Engineering, and Center of Excellence in Innovation for Sustainable Infrastructure Development, Suranaree University of Technology, Nakhon Ratchasima 30000, Thailand and Academy of Science, The Royal Society of Thailand, Bangkok 10300, Thailand.
Materials (Basel). 2021 Feb 8;14(4):798. doi: 10.3390/ma14040798.
Virgin quarried materials are becoming increasingly scarce in our environment, and these materials are no longer a viable or economical solution for the construction industry. The construction industry is constantly seeking new markets for recycled waste in civil engineering applications. This research's primary focus is the optimization of the usage of recycled materials such as recycled glass (RG), crushed brick (CB), and crushed concrete (CC), in pavement base/sub-base applications. Various percentages of RG, up to 40%, were blended with two types of CC in this research. The CC and CB, which were used as triple blends in this research, were utilized for the upper (100% CC) and lower sub-bases (up to 50% CB). This study sought to establish the maximum amount of RG that could be incorporated in the triple blends with CB and CC whilst maintaining an acceptable performance. Thus, a comprehensive series of fundamental and advanced geotechnical laboratory tests, including repeated load triaxial (RLT) and wheel-tracker (WT) tests, were performed to assess the engineering properties and permanent deformation characteristics of these triple blends. The particle-size distribution curve and California Bearing Ratio (CBR) values of all the blends met the minimum requirements. Results of RLT tests confirmed that all the nominated blends were found to provide the resilient modulus value required to be used as pavement materials. The WT results on the triple blend with 15% RG showed that the specimen performed exceptionally well during the test and comfortably met the requirements to be used in pavement applications. Based on the engineering properties and permanent deformation results, up to 15% RG can be suggested for incorporation as an accompanying material in unbound roadwork applications. Subject to the outcomes of future field testing, there might be potential to increase the percentage of RG added in the blends up to 30%.
在我们的环境中，原生采石材料正变得越来越稀缺，并且这些材料对于建筑业而言已不再是可行或经济的解决方案。建筑业一直在土木工程应用中为回收废料寻找新市场。本研究的主要重点是优化再生材料（如再生玻璃（RG）、碎砖（CB）和碎混凝土（CC））在路面基层/底基层应用中的使用。在本研究中，将高达40%的不同比例的RG与两种类型的CC进行了混合。本研究中用作三元混合物的CC和CB分别用于上基层（100%CC）和下底基层（高达50%CB）。本研究旨在确定在与CB和CC的三元混合物中可掺入的RG的最大量，同时保持可接受的性能。因此，进行了一系列全面的基础和高级岩土工程实验室测试，包括重复加载三轴（RLT）和轮辙试验（WT），以评估这些三元混合物的工程性质和永久变形特性。所有混合物的粒度分布曲线和加州承载比（CBR）值均满足最低要求。RLT试验结果证实，所有指定的混合物均能提供用作路面材料所需的回弹模量值。含15%RG的三元混合物的WT试验结果表明，该试样在试验期间表现出色，轻松满足路面应用要求。基于工程性质和永久变形结果，建议在无结合料道路工程应用中掺入高达15%的RG作为辅助材料。根据未来现场测试的结果，有可能将混合物中添加的RG百分比提高到30%。
