混凝土的非物质化:轻质膨胀粘土混凝土抗压强度的元分析

Sustainability Pub Date : 2024-07-24 DOI:10.3390/su16156346
İlbüke Uslu, Orkun Uysal, Can B. Aktaş, Byungik Chang, I. Yaman
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引用次数: 0

摘要

建筑业在全球材料消耗(包括自然资源)中占很大份额。因此,要实现联合国可持续发展目标 12.2 "可持续管理和有效利用自然资源",离不开建筑行业的重大进展和贡献。此外,建筑行业使用的各种材料也为 LEED(能源与环境设计先锋)系统的发展和扩大做出了贡献。LECA(轻质膨胀粘土骨料)就是这样一种材料,它通过轻质、隔热、隔音和防火等主要优点提高了 LEED 的性能。减轻混凝土重量的最有效方法之一就是加入轻质骨料,LECA 的优势包括减轻荷载和减少横截面,通过减少材料消耗直接改善建筑环境的可持续性。本研究旨在通过荟萃分析,为掺入 LECA 的混凝土建立抗压强度预测模型。通过 15 项不同的研究,从文献中整理出 140 多个数据点,并对结果进行分析,从而开展元分析。此外,还开展了一项实验计划,以验证模型并评估其预测抗压强度的准确性。开发的模型和实验程序得出的结果一致,与高强度值的混凝土相比,抗压强度较低。同样,w/b 比为 0.5 或更高的混凝土拌合物也能获得更准确的结果。在使用预测模型时,按混凝土体积计算的 LECA 含量较高的混凝土拌合物得出的结果更为准确。为了量化几个参数对 LECA 混凝土抗压强度的影响,我们进行了敏感性分析。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Dematerialization of Concrete: Meta-Analysis of Lightweight Expanded Clay Concrete for Compressive Strength
The construction industry is responsible for a significant share of global material consumption, including natural resources. Therefore, the United Nations Sustainable Development Goal 12.2 on sustainable management and efficient use of natural resources cannot be achieved without significant advances and contributions from the construction sector. Furthermore, various materials used by the construction industry contribute to the development and expansion of the LEED (Leadership in Energy and Environmental Design) system. LECA (Light Expanded Clay Aggregate) is one such material that enhances LEED performance through its key benefits, including lightness, thermal insulation, sound insulation, and fire resistance. One of the most effective methods for reducing the weight of concrete is the incorporation of lightweight aggregates, and the advantages of LECA include lessening loads and enabling reduced cross-sections, directly improving the sustainability of the built environment via reduced materials consumption. This study aims to develop a prediction model for the compressive strength of LECA-incorporated concrete through a meta-analysis. More than 140 data points were compiled through literature via 15 separate studies, and results were analyzed to conduct the meta-analysis. Moreover, an experimental program was carried out to verify the model and evaluate its accuracy in predicting compressive strength. Results from the developed model and the experimental program were in accordance with concrete having lower compressive strengths compared to those at high strength values. Likewise, more accurate results were obtained for concrete mixes that have w/b ratios of 0.5 or higher. Concrete mixes that have higher amounts of LECA by volume of concrete yielded more accurate results when using the prediction model. A sensitivity analysis was carried out to quantify the impact of several parameters on the compressive strength of LECA concrete.
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