Xiaoyi Liu, Zhongnan Ye, Jian-Xin Lu, Shujie Xu, Shu-Chien Hsu, Chi Sun Poon
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引用次数: 0
Abstract
Sustainable management of construction and demolition (C&D) waste and waste glass (WG) presents a significant challenge in densely populated regions like Hong Kong. While the potential for using WG in concrete is acknowledged, there is limited research on how to optimally use these materials to achieve sustainability, cost-effectiveness, and mechanical integrity. This study addresses these challenges by employing an integrated life cycle assessment and multi-criteria decision analysis (LCA-MCDA) within a cradle-to-gate scope, utilizing site-specific data. The VIKOR method, known for its robust decision-making capabilities in complex environmental assessments, was used to identify optimal concrete mixtures based on environmental, economic, and mechanical performance. The results indicate that replacing 25% of natural aggregate with recycled WG materials provides the best balance across the evaluated criteria. Furthermore, additional environmental benefits can be achieved by substituting natural aggregates with recycled waste concrete aggregates. This research underscores the importance of life cycle thinking in construction materials decision-making, demonstrating that significant use of recycled WG reduces energy consumption and greenhouse gas emissions, offering a sustainable alternative to conventional concrete.
在香港这样人口稠密的地区,建筑与拆卸(C&D)废料和废玻璃(WG)的可持续管理是一项重大挑战。虽然在混凝土中使用废玻璃的潜力已得到认可,但有关如何优化使用这些材料以实现可持续性、成本效益和机械完整性的研究却十分有限。本研究在 "从摇篮到终点 "的范围内,利用特定地点的数据,采用综合生命周期评估和多标准决策分析(LCA-MCDA)来应对这些挑战。在复杂的环境评估中,VIKOR 方法以其强大的决策能力而著称,该方法被用来确定基于环境、经济和机械性能的最佳混凝土混合物。结果表明,用回收的 WG 材料替代 25% 的天然骨料,在所有评估标准中取得了最佳平衡。此外,用回收的废弃混凝土骨料替代天然骨料还能获得额外的环境效益。这项研究强调了生命周期思想在建筑材料决策中的重要性,表明大量使用再生 WG 可以减少能源消耗和温室气体排放,为传统混凝土提供了一种可持续的替代方案。
期刊介绍:
The Journal of Cleaner Production is an international, transdisciplinary journal that addresses and discusses theoretical and practical Cleaner Production, Environmental, and Sustainability issues. It aims to help societies become more sustainable by focusing on the concept of 'Cleaner Production', which aims at preventing waste production and increasing efficiencies in energy, water, resources, and human capital use. The journal serves as a platform for corporations, governments, education institutions, regions, and societies to engage in discussions and research related to Cleaner Production, environmental, and sustainability practices.