Utilization of recycled coarse aggregate and high volume of GGBS in self-compacting concrete – an experimental study

IF 1.4 Q2 ENGINEERING, MULTIDISCIPLINARY

World Journal of Engineering Pub Date : 2023-12-26 DOI:10.1108/wje-07-2023-0266

Manjunatha M., Kavitha T.S.

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引用次数: 0

Abstract

Purpose The purpose of this study is to investigate the behaviour of M40 grade of self-compacting concrete (SCC) with high volume of ground granulated blast furnace slag (GGBS) (50%) and recycled concrete aggregate (RCA) content up to 100% to assess the mechanical properties of SCC. As per guidelines of IS: 383 – 2016, the RCA can be replaced up to 20% of natural coarse aggregate up to M25 grade of concrete. This study assesses the mechanical properties of SCC beyond 20% of RCA content. Based on the experimental investigations, the compressive strength of mixes decreases as the content of RCA increases. It is found that concrete mixes with 20% RCA and shows the maximum compressive strength at 56 days. Design/methodology/approach The fresh properties as per EFNARC and IS: 10262–2019 guidelines, ultrasonic pulse velocity testing, mechanical properties and microstructure analysis have been conducted to evaluate the performance of SCC with RCA for practical applications. Findings From the experimental investigations, it is found that up to 50% of recycled coarse aggregate can be used for structural applications. Originality/value The environmental pollution and dumping of waste on green land can be reduced by effective utilization of recycled coarse aggregate and GGBS in the production of SCC.

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自密实混凝土中再生粗骨料和大量 GGBS 的利用--一项实验研究

目的本研究的目的是调查 M40 级自密实混凝土（SCC）在大量使用磨细高炉矿渣（GGBS）（50%）和再生混凝土骨料（RCA）（最高达 100%）的情况下的性能，以评估自密实混凝土的力学性能。根据 IS: 383 - 2016 的规定，在 M25 级以下的混凝土中，RCA 最多可替代天然粗骨料的 20%。本研究对 RCA 含量超过 20% 的 SCC 的力学性能进行了评估。根据实验研究，随着 RCA 含量的增加，混合料的抗压强度会降低。研究发现，RCA 含量为 20% 的混凝土混合料在 56 天时抗压强度最大。设计/方法/途径根据 EFNARC 和 IS: 10262-2019 指南、超声波脉速测试、力学性能和微观结构分析，对含有 RCA 的 SCC 的实际应用性能进行了评估。研究结果通过实验研究发现，多达 50%的再生粗骨料可用于结构应用。原创性/价值在生产 SCC 的过程中有效利用再生粗骨料和 GGBS，可以减少环境污染和在绿地上倾倒垃圾。

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

World Journal of Engineering ENGINEERING, MULTIDISCIPLINARY-

CiteScore

4.20

自引率

10.50%

发文量

期刊介绍： The main focus of the World Journal of Engineering (WJE) is on, but not limited to; Civil Engineering, Material and Mechanical Engineering, Electrical and Electronic Engineering, Geotechnical and Mining Engineering, Nanoengineering and Nanoscience The journal bridges the gap between materials science and materials engineering, and between nano-engineering and nano-science. A distinguished editorial board assists the Editor-in-Chief, Professor Sun. All papers undergo a double-blind peer review process. For a full list of the journal''s esteemed review board, please see below.