Enhancing Sustainable Construction Practices: Utilizing Heat-Treated Recycled Concrete Fines for Improving Slag-Based Geopolymer Materials

IF 2.9 4区综合性期刊 Q1 Multidisciplinary

Arabian Journal for Science and Engineering Pub Date : 2024-08-29 DOI:10.1007/s13369-024-09477-6

Amirouche Berkouche, Ahmed Abderraouf Belkadi, Abdelaziz Hasnaoui, Salima Aggoun, Tarek Chiker, Abdelhak Khechai, Annelise Cousture, Tahar Tayebi

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Abstract

This study explores the untapped potential of utilizing heat-treated recycled fines (HT-RFs) from mortar as a sustainable and eco-friendly alternative for slag-based geopolymer materials in construction. The RFs undergo a novel heat treatment process at 650 °C to significantly enhance their reactivity. Geopolymer mixtures incorporating both heat-treated and untreated RFs at various replacement ratios (0%, 10%, 20%, and 30%) are meticulously evaluated for their porosity, flexural strength, and compressive strength after 28 days of curing. The load-midspan displacement and failure behavior are analyzed using digital image correlation techniques. The microstructure of the mortar samples is comprehensively analyzed using state-of-the-art techniques including thermogravimetry, scanning electron microscopy, and X-ray diffraction. The results showed that the incorporation of 30% heat-treated recycled fines into slag based geopolymer increased compressive and flexural strengths by 30.67% and 27.31%, respectively, while substantially reducing the porosity by 16%, compared to the control geopolymer mixture. This study promotes sustainability in construction with eco-friendly materials by minimizing waste.

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加强可持续建筑实践：利用热处理再生混凝土细粉改进矿渣基土工聚合物材料

本研究探讨了利用砂浆中经热处理的回收碎料（HT-RFs）作为建筑中以矿渣为基础的土工聚合物材料的可持续和生态友好型替代品这一尚未开发的潜力。经过 650 °C 的新型热处理工艺处理后，RFs 的反应活性显著提高。在 28 天的固化后，对含有不同替代率（0%、10%、20% 和 30%）的热处理和未处理 RF 的土工聚合物混合物的孔隙率、抗弯强度和抗压强度进行了细致的评估。使用数字图像相关技术分析了荷载-中跨位移和破坏行为。利用热重分析、扫描电子显微镜和 X 射线衍射等先进技术对砂浆样品的微观结构进行了全面分析。结果表明，与对照土工聚合物混合物相比，在矿渣基土工聚合物中加入 30% 的热处理回收细粒可使抗压强度和抗折强度分别提高 30.67% 和 27.31%，同时孔隙率大幅降低 16%。这项研究通过最大限度地减少废物，利用生态友好型材料促进了建筑业的可持续发展。

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来源期刊

Arabian Journal for Science and Engineering 综合性期刊-综合性期刊

CiteScore

5.20

自引率

3.40%

发文量

审稿时长

4.3 months

期刊介绍： King Fahd University of Petroleum & Minerals (KFUPM) partnered with Springer to publish the Arabian Journal for Science and Engineering (AJSE). AJSE, which has been published by KFUPM since 1975, is a recognized national, regional and international journal that provides a great opportunity for the dissemination of research advances from the Kingdom of Saudi Arabia, MENA and the world.