Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils
The expansive soil swells significantly in the presence of moisture, which often leads to the failure of superstructures. Conventional stabilization techniques are applied in many instances, although environmental issues are of significant concern for such stabilization. Keeping this in mind, an att...
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| Format: | Article |
| Language: | English |
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Wiley
2024-01-01
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| Series: | Advances in Civil Engineering |
| Online Access: | http://dx.doi.org/10.1155/2024/9910728 |
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| author | Opu Chandra Debanath Md. Aftabur Rahman Sultan Mohammad Farook Mohammed Russedul Islam |
| author_facet | Opu Chandra Debanath Md. Aftabur Rahman Sultan Mohammad Farook Mohammed Russedul Islam |
| author_sort | Opu Chandra Debanath |
| collection | DOAJ |
| description | The expansive soil swells significantly in the presence of moisture, which often leads to the failure of superstructures. Conventional stabilization techniques are applied in many instances, although environmental issues are of significant concern for such stabilization. Keeping this in mind, an attempt is made to apply a new approach for stabilizing different types of expansive soils, treated with a nonconventional binder geopolymer that utilizes fly ash as the main ingredient. A series of laboratory experiments are run to determine the engineering properties of treated soils with varying percentages of geopolymer from 0% to 30%. The experimental investigation involved tests such as unconfined compressive strength, compaction, Atterberg limits, and swelling pressure. Significant strength development occurs with increasing percentages of geopolymer, and their swelling pressures decrease considerably. Additionally, a series of California Bearing Ratio (CBR) tests were undertaken to assess the suitability for road construction. The optimum dosage of the stabilizing agent is found to be 20%, as justified by studies in the literature. Furthermore, scanning electronic microscope (SEM) images of the treated samples revealed microstructural changes in the soil matrix, which strongly correlate with the improvement of strength and swelling behavior. Hence, based on our experimental results, 20% geopolymer content is sufficient for enhancing the engineering properties of expansive soils, and the treated soils can directly be used as subgrade or sub-base material. |
| format | Article |
| id | doaj-art-6d64d107df4941fd93cd098164e91b84 |
| institution | Kabale University |
| issn | 1687-8094 |
| language | English |
| publishDate | 2024-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Civil Engineering |
| spelling | doaj-art-6d64d107df4941fd93cd098164e91b842025-02-03T07:23:39ZengWileyAdvances in Civil Engineering1687-80942024-01-01202410.1155/2024/9910728Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive SoilsOpu Chandra Debanath0Md. Aftabur Rahman1Sultan Mohammad Farook2Mohammed Russedul Islam3Department of Civil EngineeringDepartment of Civil EngineeringDepartment of Civil EngineeringDepartment of Civil EngineeringThe expansive soil swells significantly in the presence of moisture, which often leads to the failure of superstructures. Conventional stabilization techniques are applied in many instances, although environmental issues are of significant concern for such stabilization. Keeping this in mind, an attempt is made to apply a new approach for stabilizing different types of expansive soils, treated with a nonconventional binder geopolymer that utilizes fly ash as the main ingredient. A series of laboratory experiments are run to determine the engineering properties of treated soils with varying percentages of geopolymer from 0% to 30%. The experimental investigation involved tests such as unconfined compressive strength, compaction, Atterberg limits, and swelling pressure. Significant strength development occurs with increasing percentages of geopolymer, and their swelling pressures decrease considerably. Additionally, a series of California Bearing Ratio (CBR) tests were undertaken to assess the suitability for road construction. The optimum dosage of the stabilizing agent is found to be 20%, as justified by studies in the literature. Furthermore, scanning electronic microscope (SEM) images of the treated samples revealed microstructural changes in the soil matrix, which strongly correlate with the improvement of strength and swelling behavior. Hence, based on our experimental results, 20% geopolymer content is sufficient for enhancing the engineering properties of expansive soils, and the treated soils can directly be used as subgrade or sub-base material.http://dx.doi.org/10.1155/2024/9910728 |
| spellingShingle | Opu Chandra Debanath Md. Aftabur Rahman Sultan Mohammad Farook Mohammed Russedul Islam Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils Advances in Civil Engineering |
| title | Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils |
| title_full | Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils |
| title_fullStr | Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils |
| title_full_unstemmed | Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils |
| title_short | Application of Ecofriendly Geopolymer Binder to Enhance the Strength and Swelling Properties of Expansive Soils |
| title_sort | application of ecofriendly geopolymer binder to enhance the strength and swelling properties of expansive soils |
| url | http://dx.doi.org/10.1155/2024/9910728 |
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