Stabilization of expansive soils using chemical additives: A review
Volume instability of expansive soils due to moisture fluctuations is often disastrous, causing severe damages and distortions in the supported structures. It is, therefore, necessary to adequately improve the performance of such soils that they can favorably fulfil the post-construction stability r...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2022-08-01
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| Series: | Journal of Rock Mechanics and Geotechnical Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1674775522000658 |
| _version_ | 1811221349128994816 |
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| author | Dharmendra Barman Sujit Kumar Dash |
| author_facet | Dharmendra Barman Sujit Kumar Dash |
| author_sort | Dharmendra Barman |
| collection | DOAJ |
| description | Volume instability of expansive soils due to moisture fluctuations is often disastrous, causing severe damages and distortions in the supported structures. It is, therefore, necessary to adequately improve the performance of such soils that they can favorably fulfil the post-construction stability requirements. This can be achieved through chemical stabilization using additives such as lime, cement and fly ash. In this paper, suitability of such additives under various conditions and their mechanisms are reviewed in detail. It is observed that the stabilization process primarily involves hydration, cation exchange, flocculation and pozzolanic reactions. The degree of stabilization is controlled by several factors such as additive type, additive content, soil type, soil mineralogy, curing period, curing temperature, delay in compaction, pH of soil matrix, and molding water content, including presence of nano-silica, organic matter and sulfate compounds. Provision of nano-silica not only improves soil packing but also accelerates the pozzolanic reaction. However, presence of deleterious compounds such as sulfate or organic matter can turn the treated soils unfavorable at times even worser than the unstabilized ones. |
| first_indexed | 2024-04-12T07:57:51Z |
| format | Article |
| id | doaj.art-8fc0e8ec0f57486e91bcd06797d1c9f0 |
| institution | Directory Open Access Journal |
| issn | 1674-7755 |
| language | English |
| last_indexed | 2024-04-12T07:57:51Z |
| publishDate | 2022-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Rock Mechanics and Geotechnical Engineering |
| spelling | doaj.art-8fc0e8ec0f57486e91bcd06797d1c9f02022-12-22T03:41:25ZengElsevierJournal of Rock Mechanics and Geotechnical Engineering1674-77552022-08-0114413191342Stabilization of expansive soils using chemical additives: A reviewDharmendra Barman0Sujit Kumar Dash1Corresponding author.; Department of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, IndiaDepartment of Civil Engineering, Indian Institute of Technology Kharagpur, Kharagpur, 721302, IndiaVolume instability of expansive soils due to moisture fluctuations is often disastrous, causing severe damages and distortions in the supported structures. It is, therefore, necessary to adequately improve the performance of such soils that they can favorably fulfil the post-construction stability requirements. This can be achieved through chemical stabilization using additives such as lime, cement and fly ash. In this paper, suitability of such additives under various conditions and their mechanisms are reviewed in detail. It is observed that the stabilization process primarily involves hydration, cation exchange, flocculation and pozzolanic reactions. The degree of stabilization is controlled by several factors such as additive type, additive content, soil type, soil mineralogy, curing period, curing temperature, delay in compaction, pH of soil matrix, and molding water content, including presence of nano-silica, organic matter and sulfate compounds. Provision of nano-silica not only improves soil packing but also accelerates the pozzolanic reaction. However, presence of deleterious compounds such as sulfate or organic matter can turn the treated soils unfavorable at times even worser than the unstabilized ones.http://www.sciencedirect.com/science/article/pii/S1674775522000658Expansive soilCementLimeFly ashPozzolanic reactionsSulfate attack |
| spellingShingle | Dharmendra Barman Sujit Kumar Dash Stabilization of expansive soils using chemical additives: A review Journal of Rock Mechanics and Geotechnical Engineering Expansive soil Cement Lime Fly ash Pozzolanic reactions Sulfate attack |
| title | Stabilization of expansive soils using chemical additives: A review |
| title_full | Stabilization of expansive soils using chemical additives: A review |
| title_fullStr | Stabilization of expansive soils using chemical additives: A review |
| title_full_unstemmed | Stabilization of expansive soils using chemical additives: A review |
| title_short | Stabilization of expansive soils using chemical additives: A review |
| title_sort | stabilization of expansive soils using chemical additives a review |
| topic | Expansive soil Cement Lime Fly ash Pozzolanic reactions Sulfate attack |
| url | http://www.sciencedirect.com/science/article/pii/S1674775522000658 |
| work_keys_str_mv | AT dharmendrabarman stabilizationofexpansivesoilsusingchemicaladditivesareview AT sujitkumardash stabilizationofexpansivesoilsusingchemicaladditivesareview |