Replacing C₃S Cement with PP Fibre and Nanobiosilica in Stabilisation of Organic Clays
Article
Ghadr, S., Assadi Langroudi, A. and Bahadori, H. 2023. Replacing C₃S Cement with PP Fibre and Nanobiosilica in Stabilisation of Organic Clays. Geomechanics and Engineering. 34 (4), pp. 401-414. https://doi.org/10.12989/gae.2023.33.4.401
Authors | Ghadr, S., Assadi Langroudi, A. and Bahadori, H. |
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Abstract | Organic clays are ideal habitat for flora and fauna. From a geotechnical perspective, organic clays are soft, weak, variable, heterogeneous and flocculated. Portland cement is a universally common stabiliser. However, some organic acids in soil inhibit full hydration and expose cementation products to rapid dissolution. This paper investigates scopes for use of C₃S cement to enable durable cementation. Prospects of using PP fibre alongside with C3S cement, scopes for partial replacement of C₃S cement with a plant-based nanosilica and evolution of binders are then investigated. Binding mixtures here mimic the natural functions of rhizoliths, amorphous phases, and calcites. Testing sample population include natural and fibre-reinforced clays, compact mixes of clay - C3S cement, clay - nanobiosilica, and clay, C₃S cement and nanobiosilica. Benefits and constraints of C₃S cement and fibres for retaining the naturally flocculated structure of organic clays are discussed. Nanobiosilica provides an opportunity to cut the C₃S content, and to transition of highly compressive organic clays into an engineered, open-structured medium with >0.5 MPa compressive strength across the strains spanning from peak to 1.5-times peak. |
Journal | Geomechanics and Engineering |
Journal citation | 34 (4), pp. 401-414 |
ISSN | 2005-307X |
Year | 2023 |
Publisher | Techno-Press |
Accepted author manuscript | License File Access Level Anyone |
Digital Object Identifier (DOI) | https://doi.org/10.12989/gae.2023.33.4.401 |
Publication dates | |
Online | 25 May 2023 |
Publication process dates | |
Accepted | 23 Mar 2023 |
Deposited | 22 Jun 2023 |
Copyright holder | © 2023, Techno-Press |
https://repository.uel.ac.uk/item/8w34z
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