再生混凝土骨料:建筑业的一个有前途和可持续的选择

Driton Kryeziu, Feti Selmani, Armend Mujaj, Igli Kondi
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引用次数: 0

摘要

回收当地收集的混凝土废料,以减少碳足迹。在混凝土的制备中,鼓励使用再生混凝土骨料(RCA)代替天然骨料(NA),因为它们可以帮助减少原始材料的消耗,而原始材料的提取和运输成本高昂且对环境有害。在此背景下,我们对各种混凝土配合比进行了实验研究,以评估使用RCA代替NA对新拌混凝土和硬化混凝土物理力学性能的影响。我们研究的主要新颖之处在于符合循环经济的原则之一,即通过回收当地收集的混凝土废料来减少碳足迹。我们准备并研究了含有0%、20%、40%和60%细、粗再生混凝土骨料的试件。新混凝土的结果是确定温度、稠度、空气含量和密度,而另一方面,在硬化混凝土中,结果是确定抗压强度、抗拉劈裂强度和密度。所有结果均通过实验确定,然后进行比较。我们的研究结果表明,在混凝土混合料中使用RCA,建筑公司可以显著减少碳足迹,并有助于保护自然资源。RCA可以帮助创建一个更可持续和负担得起的建筑行业,更好地适应未来的挑战。本研究可为推进RCA在可持续建筑混凝土配制中的应用提供依据。Doi: 10.28991/HEF-2023-04-02-03全文:PDF
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Recycled Concrete Aggregates: A Promising and Sustainable Option for the Construction Industry
The recycling of locally collected concrete waste is being promoted toward reducing the carbon footprint. In the preparation of concrete, recycled concrete aggregates (RCA) are encouraged instead of natural aggregates (NA), as they can help reduce the consumption of virgin materials, the extraction and transportation of which can be costly and environmentally damaging. In this context, we conducted an experimental study on various concrete mixes to evaluate the effect of using RCA instead of NA on the physical and mechanical properties of fresh and hardened concrete. The main novelty of our study lies in meeting one of the principles of circular economy, i.e., reducing the carbon footprint, by recycling concrete waste collected locally. We prepared and investigated test specimens containing 0%, 20%, 40%, and 60% of fine and coarse recycled concrete aggregates. Results for fresh concrete were determined for temperature, consistency, air content, and density, while on the other side, in hardened concrete, results were determined for compressive strength, tensile splitting strength, and density. All results were determined experimentally and then compared. Our results showed that, with the use of RCA in the concrete mix, construction companies can significantly reduce their carbon footprints and help conserve natural resources. RCA can help create a more sustainable and affordable construction industry and is better suited to meet future challenges. Our study can serve as a basis for advancing the application of RCA in the preparation of concrete for sustainable construction. Doi: 10.28991/HEF-2023-04-02-03 Full Text: PDF
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