Department of Civil Engineering, National Institute of Technology, Srinagar, India.
Department of Civil Engineering, Islamic University of Science & Technology, Awantipora, J&K, India.
Environ Sci Pollut Res Int. 2023 Feb;30(7):17094-17107. doi: 10.1007/s11356-023-25245-9. Epub 2023 Jan 12.
The generation of waste materials is a global concern and attempts are being made to utilize these wastes in the construction industry. The development of road infrastructure everywhere is going at a fast pace which increases the environmental degradation, fossil fuel consumption, global warming, and depletion of natural materials because of hot mix asphalt (HMA) usage. The detrimental effects of generation of waste in large quantities at a global scale and virgin material/energy consumption in HMA construction are of prime concern and need to be addressed. The construction/maintenance of pavement must be environmentally, economically, and socially sustainable. Use of cold bitumen emulsion mixtures (CBEMs), a type of cold mix asphalt (CMA), is a way forward for development of sustainable road infrastructure. The incorporation of wastes in CMA can be a sustainable solution to problems linked to waste generation and development of flexible pavements with HMA. This work summarizes the staging evaluation of CBEMs incorporated with waste glass (WG) and fly ash (FA) utilizing mechanical characteristics, water sensitivity and environmental impact, critical gaps in the literature, and recommendations to address those gaps. A detailed analysis on CBEMs using WG as a replacement of fine aggregate showed comparable stability/stiffness and multifold resistance to rutting than HMA. Fly ash filler in CBEMs reported extraordinary increase in stability, stiffness, rutting resistance, and water sensitivity than reference CBEM/HMA. The focus of the research area should continue on the exploration of waste materials for use in CBEMs to achieve a better environment for society and to promote sustainability in the pavement industry.
废物的产生是一个全球性的问题，人们正在尝试将这些废物应用于建筑行业。世界各地的道路基础设施建设正在快速发展，这导致了环境恶化、化石燃料消耗、全球变暖以及天然材料的枯竭，因为使用了热拌沥青（HMA）。大量废物的产生以及 HMA 施工中对原始材料/能源的消耗所带来的有害影响是首要关注的问题，需要加以解决。道路的建设/维护必须在环境、经济和社会方面具有可持续性。使用冷沥青乳液混合物（CBEMs），即冷拌沥青（CMA）的一种类型，是发展可持续道路基础设施的一种途径。在 CMA 中掺入废物可以为解决废物产生问题以及开发具有 HMA 的柔性路面提供可持续的解决方案。这项工作总结了利用机械特性、水敏性和环境影响对掺入废玻璃（WG）和粉煤灰（FA）的 CBEMs 进行分阶段评估的情况，评估还包括了文献中的关键差距和解决这些差距的建议。对使用 WG 替代细集料的 CBEMs 的详细分析表明，其稳定性/刚度和抗车辙能力与 HMA 相当。在 CBEMs 中使用粉煤灰填料可显著提高稳定性、刚度、抗车辙能力和水敏性，优于参考 CBEM/HMA。研究领域的重点应继续关注探索可用于 CBEMs 的废物材料，以实现更有利于社会的环境，并促进路面行业的可持续性。
