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/L的KCl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0、20、40、60、80、100 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。
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.
