2023
DOI: 10.1144/qjegh2022-057
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An assessment of different alkali-activated cements as stabilizers of sulfate-bearing soils

Abstract: The stabilization of sulphate-bearing soils with traditional calcium-based stabilisers is not recommended, as reactions between the calcium and sulphates in the presence of water could lead to soil heave. Alternative stabilization methods are therefore required, and this paper proposes innovative alkali-activated cements (AAC), whose use for soil stabilisation and especially sulphate-bearing soils is little researched. To fill this knowledge gap, AAC systems with ground granulated blastfurnace slag precursor a… Show more

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Cited by 4 publications
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“…Traditional methods of chemical ground improvement include the addition of small percentages of Portland cement (Yoobanpot et al 2017 ) or lime (Ghorbani et al 2019 ; Kichou et al 2022 ; Zhang et al 2015a , b ) and also fly ash (Abdullah et al 2020 ; Deepak et al 2021 ). Recent options include more innovative cements such as alkali-activated cements/geopolymers (Ghadir and Ranjbar 2018 , Mavroulidou et al 2022 , 2023 ) or biocements, produced by the metabolic actions of microorganisms through various processes, including ureolysis (Omoregie et al 2021 ; Phillips et al 2013 ), photosynthesis (Irfan et al 2019 ), denitrification (Jain et al 2021 ; O’Donnell et al 2017 ), and methane oxidation (Ganendra et al 2014 ). This paper proposes instead the carbonic anhydrase metabolic pathway, as an innovative eco-friendly and sustainable soil stabilisation method, which can consume captured waste CO 2 or CO 2 from the atmosphere to precipitate CaCO 3 which binds together (biocements) soil particles.…”
Section: Introductionmentioning
confidence: 99%
“…Traditional methods of chemical ground improvement include the addition of small percentages of Portland cement (Yoobanpot et al 2017 ) or lime (Ghorbani et al 2019 ; Kichou et al 2022 ; Zhang et al 2015a , b ) and also fly ash (Abdullah et al 2020 ; Deepak et al 2021 ). Recent options include more innovative cements such as alkali-activated cements/geopolymers (Ghadir and Ranjbar 2018 , Mavroulidou et al 2022 , 2023 ) or biocements, produced by the metabolic actions of microorganisms through various processes, including ureolysis (Omoregie et al 2021 ; Phillips et al 2013 ), photosynthesis (Irfan et al 2019 ), denitrification (Jain et al 2021 ; O’Donnell et al 2017 ), and methane oxidation (Ganendra et al 2014 ). This paper proposes instead the carbonic anhydrase metabolic pathway, as an innovative eco-friendly and sustainable soil stabilisation method, which can consume captured waste CO 2 or CO 2 from the atmosphere to precipitate CaCO 3 which binds together (biocements) soil particles.…”
Section: Introductionmentioning
confidence: 99%