Environmental evaluation of applications of concrete with recycled material from tyre

IF 1.5 4区工程技术 Q3 ENGINEERING, CIVIL Proceedings of the Institution of Civil Engineers-Engineering Sustainability Pub Date : 2022-12-05 DOI:10.1680/jensu.22.00083

Eduardo García, M. Pradena, A. Schwarz, A. César, Bruno F. Urbano, Carlos Medina

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Abstract

Alternatives for using end-of-life tyres as a component of concrete are currently being studied. Particularly, granulated rubber and steel fibres from tyres can generate relevant technical benefits in concrete. However, it is not clear what environmental benefits these alternatives can provide. Hence, a study was carried out to evaluate, from an environmental perspective, applications of concrete with recycled materials from tyres. For this purpose, a streamlined life cycle assessment was developed to compare the impact of the use of concrete with tyre materials and traditional concrete for safety barriers, railway sleepers, pavements and masonry mortar. Furthermore, the analysis was based on energy-thermal simulations, experimental work and collected studies. The results indicated that the safety barrier and railway sleeper with tyres can reduce the harmful impact by 60% and 50%, respectively. For masonry mortar and concrete pavement applications, the impact reduction was between 4% and 10%. Moreover, one case was observed where, to comply with the technical requirements, it was necessary to incorporate more material into the concrete mix. This had a significant impact on the results, which meant that no environmental benefits were generated. Therefore, the study showed that to ensure the benefits of an application it was not only required to consider the technical advantages, but also the environmental savings that contributed to sustainable construction.

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轮胎再生材料混凝土应用的环境评价

目前正在研究使用报废轮胎作为混凝土组成部分的替代方案。特别是，轮胎的颗粒橡胶和钢纤维可以在混凝土中产生相关的技术效益。然而，目前尚不清楚这些替代品能带来什么环境效益。因此，进行了一项研究，从环境的角度评估混凝土与轮胎回收材料的应用。为此，开发了一个简化的生命周期评估，以比较使用混凝土与轮胎材料和传统混凝土用于安全屏障、铁路枕木、人行道和砌体砂浆的影响。此外，分析是基于能量-热模拟，实验工作和收集的研究。结果表明，安全护栏和带轮胎的铁路轨枕可分别减少60%和50%的有害影响。对于砌体砂浆和混凝土路面应用，影响减少在4%到10%之间。此外，还观察到一种情况，为了符合技术要求，有必要在混凝土混合物中加入更多的材料。这对结果产生了重大影响，这意味着没有产生环境效益。因此，研究表明，为了确保应用程序的效益，不仅需要考虑技术优势，还需要考虑有助于可持续建筑的环境节约。

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

Proceedings of the Institution of Civil Engineers-Engineering Sustainability ENGINEERING, CIVIL-ENGINEERING, CIVIL

CiteScore

3.70

自引率

16.70%

发文量

审稿时长

>12 weeks

期刊介绍： Engineering Sustainability provides a forum for sharing the latest thinking from research and practice, and increasingly is presenting the ''how to'' of engineering a resilient future. The journal features refereed papers and shorter articles relating to the pursuit and implementation of sustainability principles through engineering planning, design and application. The tensions between and integration of social, economic and environmental considerations within such schemes are of particular relevance. Methodologies for assessing sustainability, policy issues, education and corporate responsibility will also be included. The aims will be met primarily by providing papers and briefing notes (including case histories and best practice guidance) of use to decision-makers, practitioners, researchers and students.