Recycling red mud for low-carbon pavement: Performance evaluation and environment risk assessment

IF 7.3 1区工程技术 Q1 ENVIRONMENTAL STUDIES

Transportation Research Part D-transport and Environment Pub Date : 2024-09-27 DOI:10.1016/j.trd.2024.104428

Qianwen Tan , Jiaqi Shangguan , Qilin Yang , Dawei Wang , Ning Xie , Yangpeng Zhang

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引用次数: 0

Abstract

This study investigates the use of red mud as a substitute in grouting materials to reduce energy consumption and emissions in semi-flexible pavements (SFP). The pavement performance of SFPs constructed with various alkali-activated grouting materials was experimentally validated and investigated. Life cycle assessment (LCA) highlighted that red mud significantly lowers energy use and environmental impact of SFP. Ecotoxicological assessments confirmed that red mud is safe for use in pavement applications, posing no significant hazards even under traffic and rainfall conditions. Surface treatments for low-carbon SFP were recommended to enhance skid resistance and ecological safety. Microscopic analysis revealed that replacing cement with red mud improves the bonding interface in SFPs. This research validates the potential of recycling solid waste in SFPs, contributing to the development of low-carbon construction materials while addressing environmental impact in pavement engineering.

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回收赤泥用于低碳路面：性能评价和环境风险评估

本研究探讨了使用赤泥作为灌浆材料的替代品，以降低半柔性路面（SFP）的能耗和排放。实验验证并调查了使用各种碱激活灌浆材料建造的半柔性路面的路面性能。生命周期评估（LCA）表明，赤泥可显著降低半柔性路面的能耗和对环境的影响。生态毒理学评估证实，在路面应用中使用赤泥是安全的，即使在交通和降雨条件下也不会造成重大危害。建议对低碳 SFP 进行表面处理，以提高防滑性和生态安全性。显微分析表明，用赤泥替代水泥可改善 SFP 的粘合界面。这项研究验证了在 SFP 中回收利用固体废弃物的潜力，有助于开发低碳建筑材料，同时解决路面工程中的环境影响问题。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Transportation Research Part D-transport and Environment 工程技术-运输科技

CiteScore

14.40

自引率

9.20%

发文量

314

审稿时长

39 days

期刊介绍： Transportation Research Part D: Transport and Environment focuses on original research exploring the environmental impacts of transportation, policy responses to these impacts, and their implications for transportation system design, planning, and management. The journal comprehensively covers the interaction between transportation and the environment, ranging from local effects on specific geographical areas to global implications such as natural resource depletion and atmospheric pollution. We welcome research papers across all transportation modes, including maritime, air, and land transportation, assessing their environmental impacts broadly. Papers addressing both mobile aspects and transportation infrastructure are considered. The journal prioritizes empirical findings and policy responses of regulatory, planning, technical, or fiscal nature. Articles are policy-driven, accessible, and applicable to readers from diverse disciplines, emphasizing relevance and practicality. We encourage interdisciplinary submissions and welcome contributions from economically developing and advanced countries alike, reflecting our international orientation.