Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder
To investigate the effect of oyster shell powder (OSP) on the static and dynamic properties of expansive soil, the mechanical properties of modified soil were obtained. Taking Ningming expansive soil as the research object, triaxial shear test, dynamic triaxial test and scanning electron microscope...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-04-01
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| Series: | Heliyon |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S240584402405730X |
| _version_ | 1797198774176579584 |
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| author | Wencan Jiao Weizheng Zhou Zhen Huang Riyan Lan Min Ma |
| author_facet | Wencan Jiao Weizheng Zhou Zhen Huang Riyan Lan Min Ma |
| author_sort | Wencan Jiao |
| collection | DOAJ |
| description | To investigate the effect of oyster shell powder (OSP) on the static and dynamic properties of expansive soil, the mechanical properties of modified soil were obtained. Taking Ningming expansive soil as the research object, triaxial shear test, dynamic triaxial test and scanning electron microscope test were carried out on plain soil and 9 % expansive soil modified by oyster shell powder (ESMO). The results show that compared with plain soil, the effective cohesion of modified expansive soil with dosp < 1 mm (ESMO (dosp < 1 mm)) and dosp < 0.075 mm (ESMO (dosp < 0.075 mm)) is increased by 15.4 % and 32.8 %, respectively. Under cyclic loading, compared with plain soil, the plastic strain stability value of ESMO (dosp<0.075 mm) is reduced by 40.2 %, the pore water pressure stability value is reduced, and the stiffness is increased. The dynamic mechanical properties of ESMO (dosp<1 mm) showed the opposite trend. Through microscopic experimental analysis, the main reasons for this phenomenon are the particle size distribution, bonding form, and cementation of the two. The results can provide a theoretical basis for the practical application of ESMO and the establishment of constitutive model. |
| first_indexed | 2024-04-24T07:05:12Z |
| format | Article |
| id | doaj.art-3580bd181bec442ebd3e2117ab204eaf |
| institution | Directory Open Access Journal |
| issn | 2405-8440 |
| language | English |
| last_indexed | 2024-04-24T07:05:12Z |
| publishDate | 2024-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Heliyon |
| spelling | doaj.art-3580bd181bec442ebd3e2117ab204eaf2024-04-22T04:11:49ZengElsevierHeliyon2405-84402024-04-01108e29699Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powderWencan Jiao0Weizheng Zhou1Zhen Huang2Riyan Lan3Min Ma4Guangxi Xinfazhan Communication Group Co., Ltd., Nanning, 530029, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China; Corresponding author.School of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China; State Key Laboratory of Featured Metal Materials and Life-cycle Safety for Composite Structures, Guangxi University, Nanning, 530004, China; Corresponding author. School of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, China.Guangxi Xinfazhan Communication Group Co., Ltd., Nanning, 530029, ChinaSchool of Civil Engineering and Architecture, Guangxi University, Nanning, 530004, ChinaTo investigate the effect of oyster shell powder (OSP) on the static and dynamic properties of expansive soil, the mechanical properties of modified soil were obtained. Taking Ningming expansive soil as the research object, triaxial shear test, dynamic triaxial test and scanning electron microscope test were carried out on plain soil and 9 % expansive soil modified by oyster shell powder (ESMO). The results show that compared with plain soil, the effective cohesion of modified expansive soil with dosp < 1 mm (ESMO (dosp < 1 mm)) and dosp < 0.075 mm (ESMO (dosp < 0.075 mm)) is increased by 15.4 % and 32.8 %, respectively. Under cyclic loading, compared with plain soil, the plastic strain stability value of ESMO (dosp<0.075 mm) is reduced by 40.2 %, the pore water pressure stability value is reduced, and the stiffness is increased. The dynamic mechanical properties of ESMO (dosp<1 mm) showed the opposite trend. Through microscopic experimental analysis, the main reasons for this phenomenon are the particle size distribution, bonding form, and cementation of the two. The results can provide a theoretical basis for the practical application of ESMO and the establishment of constitutive model.http://www.sciencedirect.com/science/article/pii/S240584402405730XExpansive soilOyster shell powderTriaxial testDynamic mechanical propertiesMicrostructure |
| spellingShingle | Wencan Jiao Weizheng Zhou Zhen Huang Riyan Lan Min Ma Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder Heliyon Expansive soil Oyster shell powder Triaxial test Dynamic mechanical properties Microstructure |
| title | Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| title_full | Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| title_fullStr | Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| title_full_unstemmed | Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| title_short | Study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| title_sort | study on static and dynamic mechanical behavior of expansive soil modified by oyster shell powder |
| topic | Expansive soil Oyster shell powder Triaxial test Dynamic mechanical properties Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S240584402405730X |
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