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絮凝剂和缓凝剂对水泥固化疏浚淤泥浆效率的影响研究

章荣军, 董超强, 郑俊杰, 陆展

章荣军, 董超强, 郑俊杰, 陆展. 絮凝剂和缓凝剂对水泥固化疏浚淤泥浆效率的影响研究[J]. 岩土工程学报, 2019, 41(10): 1928-1935. DOI: 10.11779/CJGE201910018
引用本文: 章荣军, 董超强, 郑俊杰, 陆展. 絮凝剂和缓凝剂对水泥固化疏浚淤泥浆效率的影响研究[J]. 岩土工程学报, 2019, 41(10): 1928-1935. DOI: 10.11779/CJGE201910018
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ZHANG Rong-jun, DONG Chao-qiang, ZHENG Jun-jie, LU Zhan. Influences of flocculant and retarder on solidification efficiency of cement in treatment of dredged mud slurry[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1928-1935. DOI: 10.11779/CJGE201910018
Citation: ZHANG Rong-jun, DONG Chao-qiang, ZHENG Jun-jie, LU Zhan. Influences of flocculant and retarder on solidification efficiency of cement in treatment of dredged mud slurry[J]. Chinese Journal of Geotechnical Engineering, 2019, 41(10): 1928-1935. DOI: 10.11779/CJGE201910018
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絮凝剂和缓凝剂对水泥固化疏浚淤泥浆效率的影响研究  English Version

  • 1. 华中科技大学岩土与地下工程研究所,湖北 武汉 430074;
    2. 中南建筑设计院股份有限公司,湖北 武汉 430064

基金项目: 国家重点研发计划项目（2016YFC0800200）; 国家自然科学基金项目（51678266）
详细信息
    作者简介:

    章荣军(1983—),男,博士,副教授,主要从事疏浚淤泥固化与再生利用方面的研究工作。E-mail:ce_zhangrj@hust.edu.cn。

    通讯作者:

    郑俊杰，E-mail：zhengjj@hust.edu.cn

Influences of flocculant and retarder on solidification efficiency of cement in treatment of dredged mud slurry

  • 1. Institute of Geotechnical and Underground Engineering, Huazhong University of Science and Technology, Wuhan 430074, China;
    2. Central-South Architectural Design Institute Co., Ltd., Wuhan 430064, China

摘要

    摘要
  • 摘要: 在疏浚淤泥浆堆场表面形成硬壳层工作平台往往是进行堆场地基处理、缩短堆场周转期限的必要环节,但既有途径大多都涉及到在极端不利环境（泥沼）下的人力劳作,机械化程度低且施工速度极慢。鉴于此,基于常规水泥固化法（简称CCSM）,提出了采用絮凝-固化联合法（简称FSCM）处理表层疏浚淤泥浆形成硬壳层的新思路,通过开展一系列室内模型试验,探讨了在处理疏浚淤泥浆时用FSCM代替CCSM（即引入絮凝剂和缓凝剂）的可行性和必要性,并重点分析了絮凝剂和缓凝剂剂量对水泥固化淤泥浆效率的影响规律。结果表明：FSCM能“飞跃式”提升水泥对疏浚淤泥浆的固化效率,在最优絮凝剂剂量条件下可将不排水抗剪强度提高至CCSM的4.8倍以上;另外,向FSCM中引入缓凝剂还能明显强化颗粒物理沉积/固结程度,进一步促进中晚期的强度发展,且在最优缓凝剂剂量条件下,不排水抗剪强度比不掺入缓凝剂时的不排水抗剪强度高35%以上。
    Abstract: It is usually necessary to build a working platform on the surface of the dumping site of dredged mud slurry for the purpose of rapid improvement of the dumping site so as to shorten the period of land occupation. Nevertheless, most of the existing methods for building the working platform need cumbersome manual work under extremely adverse conditions, and thus show very low construction automation and speed. To resolve this problem, a new method is proposed, i.e., the flocculation-solidification combined method (FSCM) for building the working platform based on the conventional cement stabilization method (CCSM). A series of laboratory model tests are performed to demonstrate the feasibility and necessity to substitute CCSM for FSCM in treatment of dredged mud slurry at extra high water content. Effort is also made to gain an insight into the influences of flocculant dosage and retarder dosage on the solidification efficiency of cement in treatment of mud slurry. The results indicate that FSCM is able to dramatically enhance the solidification efficiency of cement in treatment of mud slurry. When the optimal dosage of flocculant is added, the undrained shear strength produced by FSCM is at least 4.8 times larger than that produced by the corresponding CCSM. Moreover, introducing retarder into FSCM can further intensify the physical sedimentation/consolidation process, and thus promote the strength development at later curing age. In comparison with a FSCM case without adding retarder, the corresponding FSCM case with the optimal dosage of retarder shows a much higher undrained shear strength.
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  • 收稿日期:  2019-01-25
  • 发布日期:  2019-10-24

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