Research trends on thermochromic asphalt mixtures functionalization: Bibliometric analysis and review

Larissa Virgínia da Silva Ribas , Iran Gomes Rocha Segundo , Joaquim Carneiro , Elisabete Fraga de Freitas , Verônica Teixeira Franco Castelo Branco
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引用次数: 0

Abstract

Asphalt mixtures absorb high levels of solar light, increasing their internal temperatures and negatively affecting their behavior. In urban areas, this leads to the urban heat island (UHI) phenomenon, where extensive asphalt coverage raises microclimate temperatures. Integrating thermochromic properties into asphalt could provide a sustainable solution to mitigate UHI while maintaining the necessary mechanical performance. This research reviews the literature, scientific advances, gaps, and future perspectives on thermochromic (TCM) asphalt mixtures through bibliometric analysis and systematic review. The analysis highlights that thermochromic asphalt has recently gained significant scientific interest, with an increasing number of publications from 2013 to 2023. Notably, Hunan University in China has emerged as a leading contributor to thermochromic-related publications. The findings identify the wet method as a prevalent form of thermochromic functionalization, with 4–6% TCM content considered most suitable for thermal performance. Adding TiO2 improves optical characteristics due to its high reflectance in the Near-infrared solar spectrum. Studies using TCM binders typically show asphalt mixtures with better resistance to rutting and cracking, likely due to enhanced thermoregulation. The key knowledge gaps identified include the lack of consistent procedures across studies, the feasibility of scaling lab-based methods to field applications, and the need for experiments to assess their impact on road safety, surface characteristics, and the durability of thermochromic properties over the pavement’s service life. This review highlights the promise of TCM for urban heat management and emphasizes the importance of additional research to achieve the ideal balance between thermal and mechanical properties.
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热致变色沥青混合物功能化的研究趋势:文献计量分析与综述
沥青混合物会吸收大量太阳光,使其内部温度升高,对其行为产生负面影响。在城市地区,这会导致城市热岛(UHI)现象,即大量沥青覆盖会使小气候温度升高。在沥青中加入热致变色特性可为缓解 UHI 提供可持续的解决方案,同时保持必要的机械性能。本研究通过文献计量分析和系统综述,回顾了有关热致变色(TCM)沥青混合料的文献、科学进展、差距和未来展望。分析结果表明,热致变色沥青最近受到了科学界的极大关注,从 2013 年到 2023 年发表的论文数量不断增加。值得注意的是,中国湖南大学已成为热致变色相关出版物的主要贡献者。研究结果表明,湿法是热致变色功能化的普遍形式,4%-6%的中药含量被认为最适合热性能。由于二氧化钛在近红外太阳光谱中的高反射率,添加二氧化钛可改善光学特性。使用中药粘结剂进行的研究通常表明,沥青混合物具有更好的抗车辙和抗开裂性能,这可能是由于热调节性能得到了增强。目前发现的主要知识空白包括:各项研究缺乏一致的程序;将基于实验室的方法推广到现场应用的可行性;以及需要通过实验来评估它们对道路安全、表面特性以及热致变色特性在路面使用寿命内的耐久性的影响。本综述强调了热变色材料在城市热管理方面的前景,并强调了开展更多研究以实现热性能与机械性能之间理想平衡的重要性。
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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