Eco-engineered soil reinforcement using recycled foundry sand and alkali-treated straw fibers

IF 5.9 2区工程技术 Q1 ENGINEERING, MULTIDISCIPLINARY

Ain Shams Engineering Journal Pub Date : 2025-10-09 DOI:10.1016/j.asej.2025.103797

Ankit Kumar, Aditya Parihar

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引用次数: 0

Abstract

Stubble burning in northern India exacerbates air pollution, while disposal of Waste Foundry Sand (WFS), a byproduct of metal casting, generates critical environmental burdens. Concurrently, natural clays are characterized by low strength, high compressibility, and susceptibility to large deformations, necessitating stabilization for engineering applications. This study explores the sustainable reuse of WFS and straw fibers to enhance clay performance, aligning with United Nations Sustainable Development Goal 11 (UNSDG11). Experimental programs incorporated 10–40 % WFS and 0.25–2 % straw, with alkali-treated fibers examined for improved bonding. Testing encompassed compaction, consolidation, Atterberg’s limits, unconfined compressive strength (UCS) at variable strain rates, and tensile strength, with durability monitored over 300 days. Results showed maximum densification at 40 % WFS with 0.25 % straw, while peak UCS occurred at 20 % WFS with 1 % straw. NaOH treatment enhanced tensile strength up to 50 %. The findings demonstrate that WFS–straw composites effectively mitigate clay’s inherent weaknesses, offering a sustainable geotechnical solution.

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利用再生铸造砂和碱处理过的秸秆纤维进行生态工程土壤加固

印度北部的残茬燃烧加剧了空气污染，而金属铸造的副产品废弃铸造砂（WFS）的处理产生了严重的环境负担。同时，天然粘土具有低强度、高压缩性和易受大变形影响的特点，因此在工程应用中需要稳定。本研究探讨了WFS和秸秆纤维的可持续再利用，以提高粘土的性能，符合联合国可持续发展目标11 （UNSDG11）。实验程序加入10 - 40% WFS和0.25 - 2%秸秆，碱处理的纤维检查改善粘合。测试包括压实、固结、Atterberg极限、变应变率下的无侧限抗压强度（UCS）和抗拉强度，耐久性监测超过300天。结果表明，40% WFS、0.25%秸秆时密度最大，20% WFS、1%秸秆时密度最大。NaOH处理可使抗拉强度提高50%。研究结果表明，wfs -秸秆复合材料有效地缓解了粘土的固有弱点，提供了一种可持续的岩土工程解决方案。

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来源期刊

Ain Shams Engineering Journal Engineering-General Engineering

CiteScore

10.80

自引率

13.30%

发文量

441

审稿时长

49 weeks

期刊介绍： in Shams Engineering Journal is an international journal devoted to publication of peer reviewed original high-quality research papers and review papers in both traditional topics and those of emerging science and technology. Areas of both theoretical and fundamental interest as well as those concerning industrial applications, emerging instrumental techniques and those which have some practical application to an aspect of human endeavor, such as the preservation of the environment, health, waste disposal are welcome. The overall focus is on original and rigorous scientific research results which have generic significance. Ain Shams Engineering Journal focuses upon aspects of mechanical engineering, electrical engineering, civil engineering, chemical engineering, petroleum engineering, environmental engineering, architectural and urban planning engineering. Papers in which knowledge from other disciplines is integrated with engineering are especially welcome like nanotechnology, material sciences, and computational methods as well as applied basic sciences: engineering mathematics, physics and chemistry.