A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents
It has been proven that the mechanical properties of frozen saline soils are different from frozen soils and unfrozen saline soils. In this paper, in order to study the effects of the salt contents on the strength characteristics of frozen soils, a series of conventional triaxial compression tests a...
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| Language: | English |
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Wiley
2018-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2018/3763569 |
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| author | Yanhu Zhao Yuanming Lai Jing Zhang Chong Wang |
| author_facet | Yanhu Zhao Yuanming Lai Jing Zhang Chong Wang |
| author_sort | Yanhu Zhao |
| collection | DOAJ |
| description | It has been proven that the mechanical properties of frozen saline soils are different from frozen soils and unfrozen saline soils. In this paper, in order to study the effects of the salt contents on the strength characteristics of frozen soils, a series of conventional triaxial compression tests are carried out for frozen saline silty clay with Na2SO4 contents 0.0, 0.5, 1.5, and 2.5% under confining pressures from 0 MPa to 18 MPa at −6°C, respectively. The experimental results show that the strength of frozen saline silty clay presents obvious nonlinearity, the strength of frozen saline silty clay increases with increasing confining pressures at first, but with a further increase in confining pressures, the strength decreases because of pressure melting and crushing phenomena under high confining pressures, and salt contents have an important influence on strength of frozen saline silty clay. A strength criterion is proposed on the basis of the experimental results. The strength criterion could well reflect the nonlinear strength characteristic of frozen saline silty clay and the influence of salt contents on frozen saline silty clay. |
| format | Article |
| id | doaj-art-0bcebde164374b7899856d5a6bfda202 |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2018-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-0bcebde164374b7899856d5a6bfda2022025-08-20T03:54:19ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/37635693763569A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt ContentsYanhu Zhao0Yuanming Lai1Jing Zhang2Chong Wang3State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaState Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, ChinaKey Laboratory of Mechanics on Disaster and Environment in Western China, The Ministry of Education of China and School of Civil Engineering and Mechanics, Lanzhou University, Lanzhou 730000, ChinaIt has been proven that the mechanical properties of frozen saline soils are different from frozen soils and unfrozen saline soils. In this paper, in order to study the effects of the salt contents on the strength characteristics of frozen soils, a series of conventional triaxial compression tests are carried out for frozen saline silty clay with Na2SO4 contents 0.0, 0.5, 1.5, and 2.5% under confining pressures from 0 MPa to 18 MPa at −6°C, respectively. The experimental results show that the strength of frozen saline silty clay presents obvious nonlinearity, the strength of frozen saline silty clay increases with increasing confining pressures at first, but with a further increase in confining pressures, the strength decreases because of pressure melting and crushing phenomena under high confining pressures, and salt contents have an important influence on strength of frozen saline silty clay. A strength criterion is proposed on the basis of the experimental results. The strength criterion could well reflect the nonlinear strength characteristic of frozen saline silty clay and the influence of salt contents on frozen saline silty clay.http://dx.doi.org/10.1155/2018/3763569 |
| spellingShingle | Yanhu Zhao Yuanming Lai Jing Zhang Chong Wang A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents Advances in Materials Science and Engineering |
| title | A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents |
| title_full | A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents |
| title_fullStr | A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents |
| title_full_unstemmed | A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents |
| title_short | A Nonlinear Strength Criterion for Frozen Sulfate Saline Silty Clay with Different Salt Contents |
| title_sort | nonlinear strength criterion for frozen sulfate saline silty clay with different salt contents |
| url | http://dx.doi.org/10.1155/2018/3763569 |
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