Stabilization of expansive clayey soil with alkali activated binders
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Low calcium fly ash has less calcium oxide content and poor early activity, cannot react with silica and alumina in the soil interior, so fly ash mainly relies on pore filling and ion exchange to reduce swelling.
“Because low calcium fly ash has less calcium oxide content and poor early activity, it cannot react with silica and alumina in the soil interior, so fly ash mainly relies on pore filling and ion exchange to reduce swelling [19,32].”
From Expansive Soil Stabilization Using Alkali-Activated Fly Ash (2023) · cites this paper as [19]
The alkali excitation reaction explains the formation of the precipitates: dissolution of SiO2 and Al2O3 in fly ash in a strong alkali environment; CaO reacting with silicate and aluminate monomers to form reaction products and C-A-S-H and C-S-H; Na+ balancing charge and being absorbed by the silica-alumina phase to form N-A-S-H; and some Ca2+ displacing Na+ to form C-A-S-H.
“The alkali excitation reaction can explain the formation of the above precipitates: (i) The dissolution of SiO 2 and Al 2 O 3 in fly ash in a strong alkali environment; (ii) A small amount of CaO in fly ash reacts with silicate and aluminate monomers to form reaction products; (iii) Some CaO reacts with silicate and aluminate monomers to form C-A-S-H, and some CaO reacts with silicate monomers to”
From Expansive Soil Stabilization Using Alkali-Activated Fly Ash (2023) · cites this paper as [19]
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Expansive Soil Stabilization Using Alkali-Activated Fly Ash
Wang, H., Liu, T., Yan, C., & Wang, J. (2023) · Processes · doi:10.3390/pr11051550 · Cited by 41 · see citing works
- Authors
- Syed, M., GuhaRay, A., & Kar, A.
- Affiliations
- Birla Institute of Technology and Science - Hyderabad Campus (IN)
- Corresponding author
- GuhaRay, Anasua
- Venue
- Geotechnical and Geological Engineering
- Published
- 2020-07-12
- Volume
- 38
- Issue
- 6
- Pages
- 6657-6677
- ISSN
- 0960-3182 (ISSN-L)
- 1573-1529
- OpenAlex
- W3041735495
- Cited by
- 76
- References
- 0
- Citations by year
- 2026: 13 · 2025: 20 · 2024: 16 · 2023: 12 · 2022: 10 · 2021: 5
- FWCI
- 3.85
- Type
- journal article
- Language
- en
- Open access
- closed
- Locations
- Geotechnical and Geological Engineering (publishedVersion)
- Topics
- Physical Sciences › Engineering › Civil and Structural Engineering › Geotechnical Engineering and Soil Stabilization
- Physical Sciences › Engineering › Civil and Structural Engineering › Geotechnical and construction materials studies
- Physical Sciences › Engineering › Civil and Structural Engineering › Concrete and Cement Materials Research
- Keywords
- expansive clay, Vertisols, alkali-activated binders, soil stabilization, swelling and shrinkage, curing time, California bearing ratio, unconfined compressive strength, shear strength, plasticity index, mineral alteration, microstructure
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