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Influence of carbon sequestration in natural clay on engineering properties of cement-lime stabilized soil mortars

Dwivedi, A and Gupta, S (2023) Influence of carbon sequestration in natural clay on engineering properties of cement-lime stabilized soil mortars. In: Developments in the Built Environment, 16 .

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Official URL: https://doi.org/10.1016/j.dibe.2023.100270


Carbon sequestration in natural soil, and using it for manufacturing of stablized earth-based materials can be an effective pathway for low embodied carbon constructions. This research demonstrates a possibility of sequestering carbon dioxide in clayey-soil, comprising of kaolinite and montmorillonite minerals, and examines its influence on rheological properties, hydration, mechanical strength and shrinkage of cement-lime-soil mortars. Carbon sequestration reduces the specific surface area, pore volume and lime reactivity of carbonated soil (CS). This leads to higher availability of unconsumed lime in cement-soil mixes, resulting in faster hydration, higher yield stress and plastic viscosity of cement-lime mixes with CS than control (with natural soil). Higher precipitation of binder gel due to addition of CS result in better stabilization, higher wet strength-to-dry strength ratio and up to 18 lower drying shrinkage than control. Depending on clay content and type of soil (S or CS), 40�58 of drying shrinkage can be reversed. © 2023 The Authors

Item Type: Journal Article
Publication: Developments in the Built Environment
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to author.
Keywords: Carbon dioxide; Hydrated lime; Hydration; Kaolinite; Lime; Mortar; Shrinkage; Soil cement; Stabilization; Yield stress, Carbon sequestration; Clayey soils; Drying shrinkages; Embodied carbons; Engineering properties; Lime stabilized soils; Mechanical; Natural clays; Natural soils; Rheological property, Soils
Department/Centre: Division of Mechanical Sciences > Centre for Sustainable Technologies (formerly ASTRA)
Date Deposited: 04 Mar 2024 06:05
Last Modified: 04 Mar 2024 06:05
URI: https://eprints.iisc.ac.in/id/eprint/84216

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