Efficacy of geopolymerization for integrated bagasse ash and quarry dust in comparison to fly ash as an admixture: A comparative study

IF 0.9 4区 工程技术 Q3 ENGINEERING, MULTIDISCIPLINARY Journal of Engineering Research Pub Date : 2024-09-01 DOI:10.1016/j.jer.2023.08.010
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Abstract

This study compares the efficacy of geopolymerized bagasse ash (GB) and geopolymerized quarry dust (GQ) with traditional flay ash-based geopolymer considering the strength properties of a subgrade. Geopolymerized composited binary admixture (GBA) was constituted by incorporating the optimum percentages of GQ and GB, on the basis of a maximum reduction of 70% and 52% in plasticity index value respectively. Then samples for strength tests such as unconfined compression tests and California bearing ratio tests were remolded using standard and modified compaction parameters. Also, the mineralogical and microstructural analyses were conducted based on SEM and EDS. The influence of curing and percentage of geopolymers was also investigated on strength properties. The performance of GBA is equivalent to traditional fly-ash-based geopolymer (GF) considering strength properties like qu and CBR ensuring more than 200% increase in the strength at 20% and 15% content respectively. However, at these contents, the ductility of GBA-treated samples is 107% higher than GF making this geopolymer more suitable under dynamic load. Formation of geopolymer gel ((N, C)-A-S-H) is confirmed by microstructural and elemental analyses but the microstructure of GBA treated sample is more porous than the microstructure of GF treated sample, which provides some advantage for particles reorientation of GBA treated sample under load before failure. Also, the proposed multi-waste geopolymer has significant implications for waste management, as its implementation for the construction of a two-lane subgrade covering a distance of 1 kilometer may enable the repurposing of 1313 tons of assorted solid waste.
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与粉煤灰作为外加剂相比,综合蔗渣灰和石矿灰的土工聚合功效:比较研究
本研究比较了土工聚合蔗渣灰(GB)和土工聚合石矿灰(GQ)与传统的以刨花灰为基础的土工聚合材料对基层强度性能的影响。土工聚合复合二元掺合料(GBA)是在塑性指数最大值分别降低 70% 和 52% 的基础上,掺入最佳比例的 GQ 和 GB 而制成的。然后,使用标准和修改后的压实参数重塑了用于强度试验(如非压缩试验和加州承载比试验)的样品。此外,还利用 SEM 和 EDS 进行了矿物学和微观结构分析。此外,还研究了固化和土工聚合物比例对强度性能的影响。从qu和CBR等强度特性来看,GBA的性能与传统的粉煤灰基土工聚合物(GF)相当,在20%和15%的含量下,强度分别提高了200%以上。不过,在这些含量下,经 GBA 处理的样品的延展性比 GF 高 107%,因此这种土工聚合物更适合承受动荷载。微观结构和元素分析证实了土工聚合物凝胶((N, C)-A-S-H) 的形成,但 GBA 处理过的样品的微观结构比 GF 处理过的样品的微观结构更多孔,这为 GBA 处理过的样品在失效前的荷载作用下颗粒重新定向提供了一些优势。此外,所提议的多废物土工聚合物对废物管理具有重要意义,因为将其用于建设一个覆盖 1 公里距离的双车道路基,可实现 1313 吨各类固体废物的再利用。
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来源期刊
Journal of Engineering Research
Journal of Engineering Research ENGINEERING, MULTIDISCIPLINARY-
CiteScore
1.60
自引率
10.00%
发文量
181
审稿时长
20 weeks
期刊介绍: Journal of Engineering Research (JER) is a international, peer reviewed journal which publishes full length original research papers, reviews, case studies related to all areas of Engineering such as: Civil, Mechanical, Industrial, Electrical, Computer, Chemical, Petroleum, Aerospace, Architectural, Biomedical, Coastal, Environmental, Marine & Ocean, Metallurgical & Materials, software, Surveying, Systems and Manufacturing Engineering. In particular, JER focuses on innovative approaches and methods that contribute to solving the environmental and manufacturing problems, which exist primarily in the Arabian Gulf region and the Middle East countries. Kuwait University used to publish the Journal "Kuwait Journal of Science and Engineering" (ISSN: 1024-8684), which included Science and Engineering articles since 1974. In 2011 the decision was taken to split KJSE into two independent Journals - "Journal of Engineering Research "(JER) and "Kuwait Journal of Science" (KJS).
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