Development and Application of Flue Gas Desulfurized Gypsum and Blast-Furnace-Slag-Based Grouting Material for Cracked Silty Mudstone
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View abstract on PubMed
Summary
This summary is machine-generated.This study introduces an eco-friendly grouting material using flue gas desulfurization gypsum (FGDG) and blast furnace slag (BFS) to stabilize cracked slopes. The new material outperforms cement-based options, enhancing rock crack repair and long-term slope stability.
Area Of Science
- Geotechnical Engineering
- Materials Science
- Environmental Engineering
Background
- Conventional cement-based grouting materials for slope stabilization are expensive, energy-intensive, and environmentally detrimental.
- Cement-hardened slurries often develop cracks at the slurry-rock interface, compromising their effectiveness.
- There is a need for sustainable and effective grouting solutions for cracked geological formations.
Purpose Of The Study
- To develop and evaluate an environmentally friendly grouting material using flue gas desulfurization gypsum (FGDG) and blast furnace slag (BFS).
- To investigate the effects of FGDG-BFS ratios and sodium gluconate (SG) additive on material properties and performance.
- To compare the efficacy of the novel FGDG-BFS grouting material against traditional cement-based materials for cracked silty mudstone slopes.
Main Methods
- Laboratory testing of hardened grouting slurries to assess setting time, fluidity, shrinkage, unconfined compressive strength (UCS), tensile strength, and shear strength.
- Evaluation of interfacial bonding strength between silty mudstone and hardened slurries.
- Comparative mechanical tests and numerical simulations (GDEM) to analyze performance on cracked silty mudstone.
Main Results
- Optimal FGDG-to-BFS ratio determined as 0.8:1, yielding mechanical properties superior to silty mudstone after 14 days of curing.
- Optimal sodium gluconate (SG) dosage of 0.4% extended setting time and improved water resistance of the hardened slurries.
- The FGDG-BFS material demonstrated superior crack repair in silty mudstone compared to cement-based materials, preventing interfacial re-cracking.
Conclusions
- The developed FGDG-BFS grouting material offers a sustainable and effective alternative to conventional cement-based grouts for cracked slope stabilization.
- The material successfully repaired existing cracks and enhanced the long-term stability of silty mudstone slopes.
- This novel grouting solution contributes to improved geotechnical engineering practices with reduced environmental impact.
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