Babalghaith Ali Mohammed, Koting Suhana, Sulong Nor Hafizah Ramli, Khan Md Zahid Hossain, Milad Abdalrhman, Yusoff Nur Izzi Md, Ibrahim Mohd Rasdan, Mohamed Abdul Halim Bin Nagor
Center for Transportation Research, Department of Civil Engineering, Faculty of Engineering, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
School of Civil and Environmental Engineering, Science and Engineering Faculty, Queensland University of Technology, 2 George Street, Brisbane, QLD, 4000, Australia.
Environ Sci Pollut Res Int. 2022 May;29(24):35557-35582. doi: 10.1007/s11356-022-19447-w. Epub 2022 Mar 3.
The daily utilization of a large amount of raw materials is causing a rapid depletion of natural resources. The growth of the human population is accompanied by higher activities in the agricultural and manufacturing sectors that resulted in a larger volume of waste materials being disposed of in landfills each year. Researchers are seeking ways to reduce the adverse impact of waste materials on the environment. One method for managing waste materials is using them as a substitute for natural materials, for example, as aggregate replacement in the construction of road pavements. This paper reviews the previous studies that explored the use of waste materials as aggregate replacement in stone matrix asphalt (SMA) mix and the performance of asphalt pavements constructed using these materials. A systematic literature search of four databases revealed that waste materials could be used as an alternative to the natural aggregates. Future studies on the SMA mixes should investigate using other waste materials that could improve mix design and enhance pavement performance. There is a need to establish a standard code of practice and train material technologists to use different types of waste in SMA pavement construction. In summary, it is essential to perform a life cycle cost analysis (LCCA) and life cycle assessment (LCA) to quantify the economic and environmental impacts of the different waste materials used as aggregates in SMA.
大量原材料的每日使用正在导致自然资源的迅速枯竭。人口增长伴随着农业和制造业活动的增加，这导致每年有更多的废料被填埋处理。研究人员正在寻找方法来减少废料对环境的不利影响。管理废料的一种方法是将它们用作天然材料的替代品，例如，在道路路面施工中用作集料替代品。本文回顾了以往探索将废料用作石屑沥青（SMA）混合料中集料替代品以及使用这些材料建造的沥青路面性能的研究。对四个数据库进行的系统文献检索表明，废料可以用作天然集料的替代品。未来关于SMA混合料的研究应调查使用其他废料，这些废料可以改进混合料设计并提高路面性能。有必要建立标准的实践规范并培训材料技术人员在SMA路面施工中使用不同类型的废料。总之，进行生命周期成本分析（LCCA）和生命周期评估（LCA）以量化在SMA中用作集料的不同废料的经济和环境影响至关重要。
