Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement
Abstract A better understanding of the tensile performance and tensile failure mechanism of cement paste is significant in preventing rock reinforcement failure. Therefore, this paper aims to reveal the tensile performance and failure mechanism of a modified Portland cement: Stratabinder HS cement....
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| Format: | Article |
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SpringerOpen
2022-11-01
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| Series: | International Journal of Concrete Structures and Materials |
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| Online Access: | https://doi.org/10.1186/s40069-022-00547-3 |
| _version_ | 1797984111852257280 |
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| author | Jianhang Chen Kangming Tao Banquan Zeng Lei Liu Hongbao Zhao Junwen Zhang Danqi Li |
| author_facet | Jianhang Chen Kangming Tao Banquan Zeng Lei Liu Hongbao Zhao Junwen Zhang Danqi Li |
| author_sort | Jianhang Chen |
| collection | DOAJ |
| description | Abstract A better understanding of the tensile performance and tensile failure mechanism of cement paste is significant in preventing rock reinforcement failure. Therefore, this paper aims to reveal the tensile performance and failure mechanism of a modified Portland cement: Stratabinder HS cement. To achieve this objective, the split tensile test was conducted on specimens followed by simulating the failure mechanism numerically. The results indicated that the water–cement rate significantly influenced the tensile performance of the cement paste. When the water–cement rate increased from 0.35 to 0.42, the tensile strength declined from 1.9 MPa to 1.5 MPa. It was also observed that vertical tensile failure constantly occurred regardless of the water–cement rate. During the testing process, tensile cracks and shear cracks occurred. The increasing rate in the number of specimen cracks was dependent on the tensile stress state. Before the tensile stress reached the peak, the crack quantity increased slightly. After the peak, the crack quantity increased dramatically. During the vertical loading process, horizontal tensile stress occurred in the specimen. This horizontal tensile stress zone showed a diamond shape. The higher the tensile stress is, the larger the area of the horizontal tensile stress zone. When the tensile strength was reached, horizontal tensile stress mainly concentrated at the vertical centre of the specimen. This finally led to tensile failure of the specimen. This paper indicated that the water–cement rate was the key factor in evaluating the tensile strength of the Stratabinder HS cement. |
| first_indexed | 2024-04-11T06:56:23Z |
| format | Article |
| id | doaj.art-174bc40ccfaf47b8a258cf9b0c3cd8bd |
| institution | Directory Open Access Journal |
| issn | 1976-0485 2234-1315 |
| language | English |
| last_indexed | 2024-04-11T06:56:23Z |
| publishDate | 2022-11-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | International Journal of Concrete Structures and Materials |
| spelling | doaj.art-174bc40ccfaf47b8a258cf9b0c3cd8bd2022-12-22T04:39:00ZengSpringerOpenInternational Journal of Concrete Structures and Materials1976-04852234-13152022-11-0116111410.1186/s40069-022-00547-3Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland CementJianhang Chen0Kangming Tao1Banquan Zeng2Lei Liu3Hongbao Zhao4Junwen Zhang5Danqi Li6State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)School of Energy and Mining Engineering, China University of Mining and Technology (Beijing)School of Energy and Mining Engineering, China University of Mining and Technology (Beijing)School of Energy and Mining Engineering, China University of Mining and Technology (Beijing)State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)State Key Laboratory for Geomechanics and Deep Underground Engineering, China University of Mining and Technology (Beijing)Energy and Chemical Engineering, WA School of Mines: Minerals, Curtin UniversityAbstract A better understanding of the tensile performance and tensile failure mechanism of cement paste is significant in preventing rock reinforcement failure. Therefore, this paper aims to reveal the tensile performance and failure mechanism of a modified Portland cement: Stratabinder HS cement. To achieve this objective, the split tensile test was conducted on specimens followed by simulating the failure mechanism numerically. The results indicated that the water–cement rate significantly influenced the tensile performance of the cement paste. When the water–cement rate increased from 0.35 to 0.42, the tensile strength declined from 1.9 MPa to 1.5 MPa. It was also observed that vertical tensile failure constantly occurred regardless of the water–cement rate. During the testing process, tensile cracks and shear cracks occurred. The increasing rate in the number of specimen cracks was dependent on the tensile stress state. Before the tensile stress reached the peak, the crack quantity increased slightly. After the peak, the crack quantity increased dramatically. During the vertical loading process, horizontal tensile stress occurred in the specimen. This horizontal tensile stress zone showed a diamond shape. The higher the tensile stress is, the larger the area of the horizontal tensile stress zone. When the tensile strength was reached, horizontal tensile stress mainly concentrated at the vertical centre of the specimen. This finally led to tensile failure of the specimen. This paper indicated that the water–cement rate was the key factor in evaluating the tensile strength of the Stratabinder HS cement.https://doi.org/10.1186/s40069-022-00547-3Cement pasteTensile strengthTensile failureFracturesWater–cement rate |
| spellingShingle | Jianhang Chen Kangming Tao Banquan Zeng Lei Liu Hongbao Zhao Junwen Zhang Danqi Li Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement International Journal of Concrete Structures and Materials Cement paste Tensile strength Tensile failure Fractures Water–cement rate |
| title | Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement |
| title_full | Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement |
| title_fullStr | Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement |
| title_full_unstemmed | Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement |
| title_short | Experimental and Numerical Investigation of the Tensile Performance and Failure Process of a Modified Portland Cement |
| title_sort | experimental and numerical investigation of the tensile performance and failure process of a modified portland cement |
| topic | Cement paste Tensile strength Tensile failure Fractures Water–cement rate |
| url | https://doi.org/10.1186/s40069-022-00547-3 |
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