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Volumetric Swell Prediction of Alkali-Activated Sulfate-Rich Dispersive Clay
https://orcid.org/http://orcid.org/0000-0001-7590-896X
Sulfate-rich dispersive clays are a major concern for road infrastructure in South America. The mere application of lime and/or Portland cement has proven to be ineffective. This paper presents an alternative stabilization methodology through alkali-activation concepts that combine the usage of carbide lime [Ca(OH)2] with a sodium hydroxide (NaOH) solution to stabilize a sulfate-rich dispersive clay. For this, a 2k factorial design approach was adopted in the definition of the experimental runs to be tested at 1-D swelling. As a reason, the effect of the following variables could be evaluated: NaOH solution concentration, amount of Ca(OH)2, and dry unit weight (γd). Essentially, the usage of a NaOH solution, combined with carbide lime, has shown to be effective in reducing the swelling of the studied mixtures. Moreover, the volumetric strain could be successfully correlated to the porosity/lime index, which enhances the novelty of the approach applied herein and enables the prediction of εv for distinct combinations of porosity and amounts of lime.
Volumetric Swell Prediction of Alkali-Activated Sulfate-Rich Dispersive Clay
https://orcid.org/http://orcid.org/0000-0001-7590-896X
Sulfate-rich dispersive clays are a major concern for road infrastructure in South America. The mere application of lime and/or Portland cement has proven to be ineffective. This paper presents an alternative stabilization methodology through alkali-activation concepts that combine the usage of carbide lime [Ca(OH)2] with a sodium hydroxide (NaOH) solution to stabilize a sulfate-rich dispersive clay. For this, a 2k factorial design approach was adopted in the definition of the experimental runs to be tested at 1-D swelling. As a reason, the effect of the following variables could be evaluated: NaOH solution concentration, amount of Ca(OH)2, and dry unit weight (γd). Essentially, the usage of a NaOH solution, combined with carbide lime, has shown to be effective in reducing the swelling of the studied mixtures. Moreover, the volumetric strain could be successfully correlated to the porosity/lime index, which enhances the novelty of the approach applied herein and enables the prediction of εv for distinct combinations of porosity and amounts of lime.
Volumetric Swell Prediction of Alkali-Activated Sulfate-Rich Dispersive Clay
https://orcid.org/http://orcid.org/0000-0001-7590-896X
Sulfate-rich dispersive clays are a major concern for road infrastructure in South America. The mere application of lime and/or Portland cement has proven to be ineffective. This paper presents an alternative stabilization methodology through alkali-activation concepts that combine the usage of carbide lime [Ca(OH)2] with a sodium hydroxide (NaOH) solution to stabilize a sulfate-rich dispersive clay. For this, a 2k factorial design approach was adopted in the definition of the experimental runs to be tested at 1-D swelling. As a reason, the effect of the following variables could be evaluated: NaOH solution concentration, amount of Ca(OH)2, and dry unit weight (γd). Essentially, the usage of a NaOH solution, combined with carbide lime, has shown to be effective in reducing the swelling of the studied mixtures. Moreover, the volumetric strain could be successfully correlated to the porosity/lime index, which enhances the novelty of the approach applied herein and enables the prediction of εv for distinct combinations of porosity and amounts of lime.
Volumetric Swell Prediction of Alkali-Activated Sulfate-Rich Dispersive Clay
Indian Geotech J
Consoli, Nilo Cesar (author) / Miguel, Gustavo Dias (author) / Scheuermann Filho, Hugo Carlos (author) / Festugato, Lucas (author) / dos Passos Coelho, Pablo Oliveira (author)
Indian Geotechnical Journal ; 55 ; 33-45
2025-02-01
13 pages
Article (Journal)
Electronic Resource
English
Volumetric Swell Prediction of Alkali-Activated Sulfate-Rich Dispersive Clay
| Springer Verlag | 2025
Stabilizing sulfate-rich high plasticity clay with moisture activated polymerization
| Online Contents | 2016
Stabilizing sulfate-rich high plasticity clay with moisture activated polymerization
| British Library Online Contents | 2016