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隧道建设(中英文) ›› 2024, Vol. 44 ›› Issue (S2): 144-151.DOI: 10.3973/j.issn.2096-4498.2024.S2.015

• 研究与探索 • 上一篇    下一篇

金属离子络合物对盾构渣土固化过程中ζ电位的影响

廖云洋1, 张恒1, 廖如鹏1, 雷命成1, 丁泊淞2, 汪优2 *   

  1. (1. 中铁二局第五工程有限公司, 四川 成都 610031 2. 中南大学土木工程学院, 湖南 长沙 410075)
  • 出版日期:2024-12-20 发布日期:2024-12-20
  • 作者简介:廖云洋(1976—),男,四川蓬溪人,2002年毕业于重庆交通学院,载运工具运用工程专业,本科,高级工程师,现从事隧道工程的施工与管理工作。E-mail: 906894026@qq.com。 *通信作者: 汪优, E-mail: ywang1920@csu.edu.cn。

Influence of Metal Ion Complex on ζ  Potential in Shield Muck During Solidification

LIAO Yunyang1, ZHANG Heng1, LIAO Rupeng1, LEI Mingcheng1, DING Bosong2, WANG You2, *   

  1. (1. Fifth Engineering Company CREGC, Chengdu 610031, Sichuan, China; 2. School of Civil Engineering, Central South University, Changsha 410075, Hunan, China)
  • Online:2024-12-20 Published:2024-12-20

摘要: 为减少盾构废弃渣土常规处理对生态环境造成的恶劣影响,提升盾构废弃渣土的资源化利用效率,采用金属离子络合物ZY-1加强盾构渣土固化过程中的水化反应。通过电位测试技术,深入分析金属离子络合物对盾构渣土固化过程中各物质颗粒表面ζ电位的影响,并给出经验参数方程。试验过程中,使用纯水并添加1 mL浓度为0.01 mmol/LKCl电解质制作试验样本悬浮液,以确保单一变量环境,ZY-1浓度分别设定为020406080100 mmol/L。研究结果表明: 1)金属离子络合物能够有效降低各物质颗粒表面的ζ电位,减小外电层厚度,从而减小颗粒之间的间距,增加固结度;2)金属离子络合物ZY-1对水泥颗粒表面ζ电位的降低效果最为明显,当ZY-1的浓度由0提升至100 mmol/L时,水泥颗粒表面的ζ电位降低61.61%3)金属离子络合物对不同颗粒表面ζ电位变化的影响程度顺序为水泥>盾构废弃渣土>碳酸钙>硫酸钙。

关键词: 金属离子络合物, 盾构渣土, 资源化利用, ζ电位

Abstract: Conventional treatment of shield muck always causes adverse impact to ecological environment. Thus, to improve the resource utilization efficiency of shield muck, metal ion complex ZY-1 is used to strengthen the hydration reaction during the solidification process of shield muck. Through potential testing, the influence of ZY-1 on ζ potential across various particle surfaces is analyzed, and empirical parameter equations are provided. During the test, pure water is used and 1 mL of KCI electrolyte with a concentration of 0.01 mmol/L is added to make a test sample suspension to ensure a single variable environment. ZY-1 concentrations are set at 0, 20, 40, 60, 80, and 100 mmol/L, respectively. The results show the following: (1) Metal ion complex effectively reduces ζ potential on various particle surfaces, diminishing the outer electric layer thickness, narrowing particle spacing, and enhancing consolidation. (2) ZY-1 shows the most significant reduction in ζ potential on cement particle surfaces; at a concentration increase from 0 to 100 mmol/L, cement particle ζ potential decreases by 61.61%. (3) The sequence of metal ion complex impact on ζ potential across different particle surfaces is as follows: cement > shield muck > calcium carbonate > calcium sulfate.

Key words: metal ion complex, shield muck, resource utilization, ζ , potential