- Book学术

发布求助

文献互助智能选刊最新文献

IF 4.3 2区工程技术 Q1 ENGINEERING, OCEAN

Applied Ocean Research Pub Date : 2024-09-19 DOI:10.1016/j.apor.2024.104230

{"title":"Experimental study on the stabilization of marine soft clay as subgrade filler using binary blending of calcium carbide residue and fly ash","authors":"","doi":"10.1016/j.apor.2024.104230","DOIUrl":null,"url":null,"abstract":"<div>This study endeavors to realize the concurrent utilization of marine soft clay (MSC) and industrial waste, specifically calcium carbide residue (CCR) and fly ash (FA), through a series of experimental investigations. The optimal ratio between CCR and FA, as well as the efficacy of the composite agent (CF–1), were examined, and an empirical equation associating the unconfined compressive strength (qu) of stabilized MSC was developed through unconfined compressive strength (UCS) tests. Microscopic analyses, including X–ray diffraction (XRD), scanning electron microscopy (SEM), and energy–dispersive spectroscopy (EDS), were employed to unveil the intrinsic mechanisms underlying CF–1 stabilized MSC. Subsequently, the suitability of CF–1 solidified MSC as a roadbed filler was ascertained through laboratory tests. Results revealed the optimum CCR:FA ratio for CF–1 to be 4:1, demonstrating superior curing effects compared to individual components such as Portland cement (PC), CCR, and FA, with commendable environmental and economic benefits. The developed empirical equation exhibited effectiveness in predicting the qu of CF–1 solidified MSC under varying curing dates (T) and dosages (Wg) conditions. Characterization through XRD, SEM, and EDS identified the primary products formed within the stabilized MSC matrix with CF–1 as comprising calcium–silicate–hydrate (C–S–H) gel, calcium–aluminate–hydrate (C–A–H) gel, and a minor amount of calcite. As T and Wg increased, the reduction in pores between soil particles enhanced the structural integrity and macro–strength of the cured MSC. The failure pattern of CF–1–solidified MSC elementary samples depended on the CF–1 dosage and curing duration. The solidification mechanism of CF–1 on MSC involved pozzolanic, ion exchange, and carbonation reactions. CF–1 solidified MSC satisfied all the specified requirements for roadbed filler in the relevant code, demonstrating substantial potential for in–situ solidification projects involving MSC.</div>","PeriodicalId":8261,"journal":{"name":"Applied Ocean Research","volume":null,"pages":null},"PeriodicalIF":4.3000,"publicationDate":"2024-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Ocean Research","FirstCategoryId":"5","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0141118724003511","RegionNum":2,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"ENGINEERING, OCEAN","Score":null,"Total":0}

引用次数: 0

摘要

本研究通过一系列实验研究，努力实现海洋软粘土（MSC）与工业废弃物（特别是电石渣（CCR）和粉煤灰（FA））的同时利用。研究探讨了 CCR 和 FA 的最佳比例以及复合剂（CF-1）的功效，并通过无侧限抗压强度（UCS）测试，建立了与稳定 MSC 的无侧限抗压强度（qu）相关的经验方程。通过 X 射线衍射（XRD）、扫描电子显微镜（SEM）和能量色散光谱（EDS）等显微分析，揭示了 CF-1 稳定 MSC 的内在机理。随后，通过实验室测试确定了 CF-1 固化 MSC 作为路基填料的适用性。结果表明，CF-1 的最佳 CCR:FA 比率为 4:1，与硅酸盐水泥 (PC)、CCR 和 FA 等单个成分相比，其固化效果更佳，具有值得称道的环境和经济效益。所开发的经验方程可有效预测不同固化日期（T）和剂量（Wg）条件下 CF-1 固化 MSC 的质量。通过 XRD、SEM 和 EDS 表征，确定了 CF-1 在稳定的 MSC 基质中形成的主要产物包括硅酸钙水合物（C-S-H）凝胶、铝酸钙水合物（C-A-H）凝胶和少量方解石。随着 T 和 Wg 的增加，土壤颗粒间孔隙的减少增强了固化 MSC 的结构完整性和宏观强度。CF-1 固化 MSC 基本样品的破坏模式取决于 CF-1 的用量和固化时间。CF-1 对 MSC 的固化机理包括胶凝反应、离子交换反应和碳化反应。CF-1 固化的 MSC 满足相关规范中对路基填料的所有规定要求，这表明涉及 MSC 的原位固化项目具有巨大的潜力。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

查看原文本刊更多论文

Experimental study on the stabilization of marine soft clay as subgrade filler using binary blending of calcium carbide residue and fly ash

This study endeavors to realize the concurrent utilization of marine soft clay (MSC) and industrial waste, specifically calcium carbide residue (CCR) and fly ash (FA), through a series of experimental investigations. The optimal ratio between CCR and FA, as well as the efficacy of the composite agent (CF–1), were examined, and an empirical equation associating the unconfined compressive strength (q_u) of stabilized MSC was developed through unconfined compressive strength (UCS) tests. Microscopic analyses, including X–ray diffraction (XRD), scanning electron microscopy (SEM), and energy–dispersive spectroscopy (EDS), were employed to unveil the intrinsic mechanisms underlying CF–1 stabilized MSC. Subsequently, the suitability of CF–1 solidified MSC as a roadbed filler was ascertained through laboratory tests. Results revealed the optimum CCR:FA ratio for CF–1 to be 4:1, demonstrating superior curing effects compared to individual components such as Portland cement (PC), CCR, and FA, with commendable environmental and economic benefits. The developed empirical equation exhibited effectiveness in predicting the q_u of CF–1 solidified MSC under varying curing dates (T) and dosages (W_g) conditions. Characterization through XRD, SEM, and EDS identified the primary products formed within the stabilized MSC matrix with CF–1 as comprising calcium–silicate–hydrate (C–S–H) gel, calcium–aluminate–hydrate (C–A–H) gel, and a minor amount of calcite. As T and W_g increased, the reduction in pores between soil particles enhanced the structural integrity and macro–strength of the cured MSC. The failure pattern of CF–1–solidified MSC elementary samples depended on the CF–1 dosage and curing duration. The solidification mechanism of CF–1 on MSC involved pozzolanic, ion exchange, and carbonation reactions. CF–1 solidified MSC satisfied all the specified requirements for roadbed filler in the relevant code, demonstrating substantial potential for in–situ solidification projects involving MSC.

求助全文

通过发布文献求助，成功后即可免费获取论文全文。去求助

来源期刊

Applied Ocean Research 地学-工程：大洋

CiteScore

8.70

自引率

7.00%

发文量

316

审稿时长

59 days

期刊介绍： The aim of Applied Ocean Research is to encourage the submission of papers that advance the state of knowledge in a range of topics relevant to ocean engineering.