Shear behavior of reinforced concrete beams incorporating ferrochrome slag aggregate and fly ash

IF 2.7 4区环境科学与生态学 Q3 ENVIRONMENTAL SCIENCES

Journal of Material Cycles and Waste Management Pub Date : 2024-07-24 DOI:10.1007/s10163-024-02035-0

Priyadarshini Das, Sushanta Chakraborty, Sudhirkumar V. Barai

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引用次数: 0

Abstract

Ferrochrome slag aggregate concrete (FCSAC) incorporated with fly ash offers multiple benefits over FCSAC alone and natural aggregate concrete (NAC) in terms of durability and environmental impacts, without sacrificing essential strength. However, structural behavior of fly ash-based FCSAC is poorly understood due to lack of investigations. This study examined shear performance of 16 full-scale reinforced concrete beams. FCSAC was prepared using 100% FCS coarse aggregate and fly ash as fractional cement replacement (0%, 20% and 30%). To completely comprehend the shear resistance mechanism of FCSAC, eight beams were built without shear reinforcement and eight with it. NAC and FCSAC (without fly ash) were considered as the reference beams. Existing design guidelines and fracture mechanics approaches were verified to predict shear capacity of FCSAC beams. The findings of the study revealed that fly ash incorporated FCSAC beam exhibited fewer cracks and higher shear capacity (about 7%) than NAC beam, but lower strength (about 8%) than FCSAC without fly ash beam. Shear provisions outlined in CSA provisions and fracture model by Gastebled and May could be adopted for FCSAC (with or without fly ash) beams without risk. This research demonstrates that fly ash-based FCSAC can be utilized safely for structural purposes.

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含铬铁矿渣骨料和粉煤灰的钢筋混凝土梁的抗剪性能

掺入粉煤灰的铁铬渣骨料混凝土（FCSAC）与单独的铁铬渣骨料混凝土和天然骨料混凝土（NAC）相比，在耐久性和环境影响方面具有多种优势，而且不会牺牲基本强度。然而，由于缺乏调查，人们对以粉煤灰为基础的 FCSAC 的结构行为知之甚少。本研究考察了 16 根全尺寸钢筋混凝土梁的剪切性能。FCSAC 采用 100% FCS 粗骨料和粉煤灰作为部分水泥替代物（0%、20% 和 30%）进行制备。为全面了解 FCSAC 的抗剪机理，我们建造了八根无抗剪加固的梁和八根有抗剪加固的梁。将 NAC 和 FCSAC（不含粉煤灰）作为参考梁。对现有的设计准则和断裂力学方法进行了验证，以预测 FCSAC 梁的抗剪能力。研究结果表明，与 NAC 梁相比，掺入粉煤灰的 FCSAC 梁裂缝更少，抗剪能力更高（约 7%），但与不含粉煤灰的 FCSAC 梁相比，强度更低（约 8%）。对于 FCSAC（含或不含粉煤灰）梁，可采用 CSA 规定中的剪切规定以及 Gastebled 和 May 的断裂模型，而不会产生风险。这项研究表明，基于粉煤灰的 FCSAC 可以安全地用于结构目的。

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来源期刊

Journal of Material Cycles and Waste Management 环境科学-环境科学

CiteScore

5.30

自引率

16.10%

发文量

205

审稿时长

4.8 months

期刊介绍： The Journal of Material Cycles and Waste Management has a twofold focus: research in technical, political, and environmental problems of material cycles and waste management; and information that contributes to the development of an interdisciplinary science of material cycles and waste management. Its aim is to develop solutions and prescriptions for material cycles. The journal publishes original articles, reviews, and invited papers from a wide range of disciplines related to material cycles and waste management. The journal is published in cooperation with the Japan Society of Material Cycles and Waste Management (JSMCWM) and the Korea Society of Waste Management (KSWM).