Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State
This study aims at determining the effect of water pressure on the mechanical properties of concrete subjected to freeze-thaw (F-T) attack under the dynamic triaxial compression state. Two specimens were used: (1) a 100 mm × 100 mm × 400 mm prism for testing the loss of mass and relative dynamic mod...
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| Format: | Article |
| Language: | English |
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Wiley
2019-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2019/8702324 |
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| author | Ruijun Wang Yan Li Yang Li Fan Xu Xiaotong Li Tenghuan Fu |
| author_facet | Ruijun Wang Yan Li Yang Li Fan Xu Xiaotong Li Tenghuan Fu |
| author_sort | Ruijun Wang |
| collection | DOAJ |
| description | This study aims at determining the effect of water pressure on the mechanical properties of concrete subjected to freeze-thaw (F-T) attack under the dynamic triaxial compression state. Two specimens were used: (1) a 100 mm × 100 mm × 400 mm prism for testing the loss of mass and relative dynamic modulus of elasticity (RDME) after F-T cycles and (2) cylinders with a diameter of 100 mm and a height of 200 mm for testing the dynamic mechanical properties of concrete. Strain rates ranged from 10−5·s−1 to 10−3·s−1, and F-T cycles ranged from 0 to 100. Three levels of water pressure (0, 5, and 10 MPa) were applied to concrete. Results showed that as the number of F-T cycles increased, the mass loss rate of the concrete specimen initially decreased and then increased, but the RDME decreased. Under 5 MPa of water pressure and at the same strain rate, the ultimate compressive strength decreased, whereas the peak strain increased with the increase in the number of F-T cycles. This result is contrary to the variation law of ultimate compressive strength and peak strain with the increase in strain rate under the same number of F-T times. With the increase in F-T cycles or water pressure, the strain sensitivity of the dynamic increase factor of ultimate compressive strength and peak strain decreased, respectively. After 100 F-T cycles, the dynamic compressive strength under all water pressure levels tended to increase as the strain rate increased, whereas the peak strain decreased gradually. |
| format | Article |
| id | doaj-art-85ac589579f14ca3ae10b5aefc812f4e |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-85ac589579f14ca3ae10b5aefc812f4e2025-02-03T01:07:48ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/87023248702324Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression StateRuijun Wang0Yan Li1Yang Li2Fan Xu3Xiaotong Li4Tenghuan Fu5Institute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaInstitute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaInstitute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaInstitute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaInstitute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaInstitute of Water Resources and Hydroelectric Engineering, Xi’an University of Technology, Xi’an, Shaanxi 710048, ChinaThis study aims at determining the effect of water pressure on the mechanical properties of concrete subjected to freeze-thaw (F-T) attack under the dynamic triaxial compression state. Two specimens were used: (1) a 100 mm × 100 mm × 400 mm prism for testing the loss of mass and relative dynamic modulus of elasticity (RDME) after F-T cycles and (2) cylinders with a diameter of 100 mm and a height of 200 mm for testing the dynamic mechanical properties of concrete. Strain rates ranged from 10−5·s−1 to 10−3·s−1, and F-T cycles ranged from 0 to 100. Three levels of water pressure (0, 5, and 10 MPa) were applied to concrete. Results showed that as the number of F-T cycles increased, the mass loss rate of the concrete specimen initially decreased and then increased, but the RDME decreased. Under 5 MPa of water pressure and at the same strain rate, the ultimate compressive strength decreased, whereas the peak strain increased with the increase in the number of F-T cycles. This result is contrary to the variation law of ultimate compressive strength and peak strain with the increase in strain rate under the same number of F-T times. With the increase in F-T cycles or water pressure, the strain sensitivity of the dynamic increase factor of ultimate compressive strength and peak strain decreased, respectively. After 100 F-T cycles, the dynamic compressive strength under all water pressure levels tended to increase as the strain rate increased, whereas the peak strain decreased gradually.http://dx.doi.org/10.1155/2019/8702324 |
| spellingShingle | Ruijun Wang Yan Li Yang Li Fan Xu Xiaotong Li Tenghuan Fu Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State Advances in Materials Science and Engineering |
| title | Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State |
| title_full | Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State |
| title_fullStr | Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State |
| title_full_unstemmed | Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State |
| title_short | Influence of Water Pressure on the Mechanical Properties of Concrete after Freeze-Thaw Attack under Dynamic Triaxial Compression State |
| title_sort | influence of water pressure on the mechanical properties of concrete after freeze thaw attack under dynamic triaxial compression state |
| url | http://dx.doi.org/10.1155/2019/8702324 |
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