Durability performance of concrete containing recycled coarse aggregates derived from laboratory-tested specimens

IF 1.4 Q2 ENGINEERING, MULTIDISCIPLINARY

World Journal of Engineering Pub Date : 2023-04-18 DOI:10.1108/wje-02-2023-0033

E. Benito, Ariel Miguel M. Aragoncillo, Francis Augustus A. Pascua, Jules M. Juanites, Maricel A. Eneria, Richelle G. Zafra, M. Madlangbayan

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引用次数: 1

Abstract

Purpose The durability of concrete containing recycled aggregates, sourced from concrete specimens that have been tested in laboratory testing facilities, remains understudied. This paper aims to present the results of experiments investigating the effect of incorporating such type of concrete waste on the strength and durability-related properties of concrete. Design/methodology/approach A total of 77 concrete cylinders sized Ø100 × 200 mm with varying amount of recycled concrete aggregate (RCA) (0%–100% by volume, at 25% increments) and maximum aggregate size (12.5, 19.0 and 25.0 mm) were fabricated and tested for slump, compressive strength, sorptivity and electrical resistivity. Disk-shaped specimens, 50-mm thick, were cut from the original cylinders for sorptivity and resistivity tests. Analysis of variance and post hoc test were conducted to detect statistical variability among the data. Findings Compared to regular concrete, a reduction of slump (by 18.6%), strength (15.1%), secondary sorptivity (31.5%) and resistivity (17.0%) were observed from concrete containing 100% RCA. Statistical analyses indicate that these differences are significant. In general, an aggregate size of 19 mm was found to produce the optimum value of slump, compressive strength and sorptivity in regular and RCA-added concrete. Originality/value The results of this study suggest that comparable properties of normal concrete were still achieved by replacing 25% of coarse aggregate volume with 19-mm RCA, which was processed from laboratory-tested concrete samples. Therefore, such material can be considered as a potential and sustainable alternative to crushed gravel for use in light or nonstructural concrete construction.

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来自实验室试验样品的含有再生粗骨料的混凝土的耐久性性能

目的含有再生骨料的混凝土的耐久性，来源于在实验室测试设施中测试过的混凝土样本，仍然研究不足。本文旨在介绍研究掺入此类混凝土废料对混凝土强度和耐久性相关性能影响的实验结果。设计/方法/方法共有77个混凝土圆柱体，尺寸为100 × 200 mm，具有不同数量的再生混凝土骨料（RCA）（按体积计0%–100%，增量为25%）和最大骨料尺寸（12.5、19.0和25.0 mm），并测试坍落度、抗压强度、吸附性和电阻率。从原始圆柱体上切下50毫米厚的圆盘状试样，进行吸附性和电阻率测试。进行方差分析和事后检验，以检测数据之间的统计变异性。结果与普通混凝土相比，含有100%RCA的混凝土坍落度（降低18.6%）、强度（降低15.1%）、二次吸收率（降低31.5%）和电阻率（降低17.0%）。统计分析表明，这些差异是显著的。一般来说，骨料尺寸为19 mm在普通混凝土和添加RCA的混凝土中产生坍落度、抗压强度和吸附性的最佳值。独创性/价值本研究的结果表明，用19mm RCA代替25%的粗骨料体积，仍然可以获得普通混凝土的可比性能，RCA是从实验室测试的混凝土样品中加工而成的。因此，这种材料可以被认为是轻质或非结构混凝土建筑中使用的碎砾石的潜在和可持续的替代品。

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.