Synergistic optimization of nanosilica sol-calcium aluminate cement composite grout by silica micropowder: Effects on microstructure and sealing performance
Xuzhou University of Technology · Underground Systems (United States) · +1 more institution
Abstract
This study investigates the influence of silica micropowder, used as a partial replacement for calcium aluminate cement (CAC), on the rheology, early strength, sealing performance, and pore-structure evolution of nanosilica sol-CAC composite grout. Results showed that a significant increase in silica micropowder content delayed the hydration process and postponed the rapid-rise viscosity point, thereby extending the workable time window. An appropriate dosage (10%) enhanced compressive strength by approximately 7%, whereas excessive amounts decreased strength due to insufficient reactive components. Grouting substantially reduced rock-core permeability by more than three orders of magnitude, and the lowest…
Citation impact
- FWCI
- 49.18
- Percentile
- 100%
- References
- 25
Authors
6- DPDongjiang Pan
Xuzhou University of Technology, Underground Systems (United States)
- NZNong ZhangCorresponding
China University of Mining and Technology, Underground Systems (United States)
- CLCheng’ao Liu
Xuzhou University of Technology, China University of Mining and Technology
- WWWeijie Wu
Xuzhou University of Technology, China University of Mining and Technology
- DLDongxu Liang
Xuzhou University of Technology
Topics & keywords
- Microstructure
- Cement
- Composite number
- Aluminate
- Porosity
- Compressive strength
- Permeability (electromagnetism)