钢渣部分替代骨料对钢筋混凝土梁性能的影响

IF 3.6 3区 工程技术 Q1 CONSTRUCTION & BUILDING TECHNOLOGY International Journal of Concrete Structures and Materials Pub Date : 2024-08-26 DOI:10.1186/s40069-024-00698-5
Tadese Birlie Mekonen, Temesgen Ejigu Alene, Yared Aklilu Alem, Wallelign Mulugeta Nebiyu
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引用次数: 0

摘要

在全球都在追求混凝土生产的可持续替代品之际,本研究探讨了将副产品或废料作为骨料支持混凝土建筑业的可行性,并特别强调了钢渣。本研究的目的是评估钢渣在混凝土生产中部分替代细骨料和粗骨料的有效性。实验包括浇注 30 个立方体和 10 个梁,细骨料的替代率从 0% 到 60%。按照 ACI 方法进行了 7 天和 28 天的抗折和抗压强度测试。结果显示,用钢渣替代 30% 的细骨料可提高 7 天和 28 天的抗压强度,而替代 45% 的细骨料则可提高 28 天的抗折强度。建议进一步进行化学分析和优化,以获得更深入的见解。该研究的结论是,部分替代钢渣可略微提高抗压和抗折强度,确定 30% 的细骨料和 45% 的粗骨料为最佳替代物。此外,钢渣的矿物成分变化很大,其化合物包括二氧化硅 (SiO2)、氧化铁 (Fe2O3)、氧化锰 (MnO)、氧化铝 (Al2O3) 和氧化钙 (CaO)。化学分析表明,硅酸盐含量高,碱含量低,有助于提高混凝土浇筑时的强度。坍落度测试证实,较高的钢渣掺量会降低施工性。不过,所有混合料都能保持真正的坍落度,单位重量也随着钢渣骨料掺量的增加而增加。抗压强度随着钢渣含量的增加而逐步提高,这与之前的研究结果一致。此外,随着钢渣替代粗骨料和细骨料,抗折强度也会提高,这表明钢筋混凝土结构的性能会得到增强。这些研究结果凸显了钢渣作为混凝土生产中可持续替代品的潜力,旨在推动其在建筑行业的应用,促进环境的可持续发展和经济可行性。
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Influence of Steel Slag as a Partial Replacement of Aggregate on Performance of Reinforced Concrete Beam

Amidst the global pursuit of sustainable alternatives in concrete production, this study explores the viability of incorporating by-products or waste materials as aggregates to support the concrete construction industry, with a specific emphasis on steel slag. The objective of this study is to evaluate the effectiveness of steel slag as a partial replacement for fine and coarse aggregates in concrete production. The experiment involved casting 30 cubes and 10 beams, replacing fine aggregate from 0 to 60%. Flexural and compressive strength tests at 7 and 28 days followed the ACI method. Results revealed that a 30% replacement of fine aggregate with steel slag led to higher compressive strength at both 7 and 28 days, while a 45% replacement showed superior flexural strength at 28 days. Further chemical analysis and optimization are recommended for deeper insights. The study concludes with marginal improvements in compressive and flexural strength with steel slag partial replacement, identifying 30% for fine aggregate and 45% for coarse aggregate as optimal replacements. In addition, the mineral composition of steel slag exhibits significant variability, with compounds, including silicon dioxide (SiO2), iron oxide (Fe2O3), manganese oxide (MnO), aluminum oxide (Al2O3), and calcium oxide (CaO). Chemical analysis indicates high silicate content and minimal alkali content, contributing to enhanced strength during concreting. Higher steel slag replacement reduces workability, confirmed by slump tests. However, all mixes maintain a true slump, and unit weight increases with steel slag aggregate replacement. Compressive strength improves incrementally with higher steel slag content, echoing prior research. In addition, flexural strength rises with steel slag replacing both coarse and fine aggregates, suggesting enhanced performance in reinforced concrete structures. These findings highlight steel slag’s potential as a sustainable alternative in concrete production, aiming to advance its application in the construction industry, promoting environmental sustainability and economic viability.

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来源期刊
International Journal of Concrete Structures and Materials
International Journal of Concrete Structures and Materials CONSTRUCTION & BUILDING TECHNOLOGY-ENGINEERING, CIVIL
CiteScore
6.30
自引率
5.90%
发文量
61
审稿时长
13 weeks
期刊介绍: The International Journal of Concrete Structures and Materials (IJCSM) provides a forum targeted for engineers and scientists around the globe to present and discuss various topics related to concrete, concrete structures and other applied materials incorporating cement cementitious binder, and polymer or fiber in conjunction with concrete. These forums give participants an opportunity to contribute their knowledge for the advancement of society. Topics include, but are not limited to, research results on Properties and performance of concrete and concrete structures Advanced and improved experimental techniques Latest modelling methods Possible improvement and enhancement of concrete properties Structural and microstructural characterization Concrete applications Fiber reinforced concrete technology Concrete waste management.
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