Geotechnical characterization of sustainable geopolymer improved soil
Geopolymer (GP) has recently emerged as a novel and environmental friendly alternative to conventional soil stabilization products like lime and Ordinary Portland Cement (OPC), which adversely affect the environment. This article emphasizes GPs produced from high calcium class C fly ash (CFA) and an...
| Main Authors: | , , , |
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| Format: | Article |
| Language: | English |
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De Gruyter
2022-07-01
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| Series: | Journal of the Mechanical Behavior of Materials |
| Subjects: | |
| Online Access: | https://doi.org/10.1515/jmbm-2022-0044 |
| _version_ | 1811203025682825216 |
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| author | Al-Rkaby Alaa H. J. Odeh Noor Aamer Sabih Ahmed Odah Haider |
| author_facet | Al-Rkaby Alaa H. J. Odeh Noor Aamer Sabih Ahmed Odah Haider |
| author_sort | Al-Rkaby Alaa H. J. |
| collection | DOAJ |
| description | Geopolymer (GP) has recently emerged as a novel and environmental friendly alternative to conventional soil stabilization products like lime and Ordinary Portland Cement (OPC), which adversely affect the environment. This article emphasizes GPs produced from high calcium class C fly ash (CFA) and an alkali activator comprising sodium hydroxide and sodium silicate solution for sand stabilization. The experimental program includes a series of unconfined compressive strength (UCS), flexural strength, tensile strength, and microstructural analyses using scanning electron microscopy. Results revealed that UCS, flexural strength, and tensile strength of GP-treated soil were in the range of 2–10, 0.5–2.0, and 0.4–1.2 MPa, respectively (depending on the ratio of fly ash and activator). These strengths were even higher than those of cement-stabilized soil. The microstructural analysis revealed that the formation of dense calcium–sodium alumina–silicate hydrated gel (C, N–A–S–H) is the reason for strength improvement. According to the findings of this study, using a CFA-GP binder for soil improvement is a viable alternative to OPC in geotechnical applications. |
| first_indexed | 2024-04-12T02:47:54Z |
| format | Article |
| id | doaj.art-bad2294c21e14085bcccb42e194037a1 |
| institution | Directory Open Access Journal |
| issn | 2191-0243 |
| language | English |
| last_indexed | 2024-04-12T02:47:54Z |
| publishDate | 2022-07-01 |
| publisher | De Gruyter |
| record_format | Article |
| series | Journal of the Mechanical Behavior of Materials |
| spelling | doaj.art-bad2294c21e14085bcccb42e194037a12022-12-22T03:51:06ZengDe GruyterJournal of the Mechanical Behavior of Materials2191-02432022-07-0131148449110.1515/jmbm-2022-0044Geotechnical characterization of sustainable geopolymer improved soilAl-Rkaby Alaa H. J.0Odeh Noor Aamer1Sabih Ahmed2Odah Haider3College of Engineering, University of Thi-Qar, Nasiriyah, IraqCollege of Engineering, University of Thi-Qar, Nasiriyah, IraqCollege of Engineering, University of Thi-Qar, Nasiriyah, IraqCollege of Engineering, University of Thi-Qar, Nasiriyah, IraqGeopolymer (GP) has recently emerged as a novel and environmental friendly alternative to conventional soil stabilization products like lime and Ordinary Portland Cement (OPC), which adversely affect the environment. This article emphasizes GPs produced from high calcium class C fly ash (CFA) and an alkali activator comprising sodium hydroxide and sodium silicate solution for sand stabilization. The experimental program includes a series of unconfined compressive strength (UCS), flexural strength, tensile strength, and microstructural analyses using scanning electron microscopy. Results revealed that UCS, flexural strength, and tensile strength of GP-treated soil were in the range of 2–10, 0.5–2.0, and 0.4–1.2 MPa, respectively (depending on the ratio of fly ash and activator). These strengths were even higher than those of cement-stabilized soil. The microstructural analysis revealed that the formation of dense calcium–sodium alumina–silicate hydrated gel (C, N–A–S–H) is the reason for strength improvement. According to the findings of this study, using a CFA-GP binder for soil improvement is a viable alternative to OPC in geotechnical applications.https://doi.org/10.1515/jmbm-2022-0044class c fly ashucsindirect strengthflexural strengthgeopolymersand soilsem/eds |
| spellingShingle | Al-Rkaby Alaa H. J. Odeh Noor Aamer Sabih Ahmed Odah Haider Geotechnical characterization of sustainable geopolymer improved soil Journal of the Mechanical Behavior of Materials class c fly ash ucs indirect strength flexural strength geopolymer sand soil sem/eds |
| title | Geotechnical characterization of sustainable geopolymer improved soil |
| title_full | Geotechnical characterization of sustainable geopolymer improved soil |
| title_fullStr | Geotechnical characterization of sustainable geopolymer improved soil |
| title_full_unstemmed | Geotechnical characterization of sustainable geopolymer improved soil |
| title_short | Geotechnical characterization of sustainable geopolymer improved soil |
| title_sort | geotechnical characterization of sustainable geopolymer improved soil |
| topic | class c fly ash ucs indirect strength flexural strength geopolymer sand soil sem/eds |
| url | https://doi.org/10.1515/jmbm-2022-0044 |
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