Zeta Potential Change and curing effects on Shield Muck solidified by Metal Ion Complex Catalysis
Bosong Ding1, Ping Lou1, Isamu Yoshitake2
1School of Civil Engineering, Central South University, Changsha, 410075, China.
Scientific Reports
|January 17, 2025
Summary
Metal ion complexes reduce the zeta potential of shield muck curing materials, enhancing compressive strength by over 35%. This research offers valuable insights for sustainable shield slag soil utilization.
Area of Science:
- Materials Science
- Geotechnical Engineering
- Environmental Science
Background:
- Shield muck, a byproduct of tunneling, requires effective curing for sustainable utilization.
- Metal ion complexes are explored as additives to modify the properties of curing materials.
Purpose of the Study:
- To investigate the effect of metal ion complexes on the zeta potential and microstructure of shield muck curing materials.
- To evaluate the impact of these complexes on the compressive strength and crystalline product formation of cured shield muck.
Main Methods:
- Potentiometric testing to measure zeta potential of particle surfaces.
- Electron microscopy to analyze microscopic characteristics.
- Compressive strength testing of cured shield muck products.
Main Results:
- Metal ion complexes significantly reduce the zeta potential of shield muck and conventional curing materials (cement, calcium carbonate, calcium sulfate).
- A negative correlation exists between metal ion complex concentration and zeta potential (0-100 mmol/L).
- Metal ion complexes accelerate crystalline product formation, increasing compressive strength of shield muck products by over 35%.
Conclusions:
- Metal ion complexes effectively modify the properties of shield muck curing materials.
- The findings provide a basis for the efficient treatment and sustainable use of shield slag soil in engineering applications.
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