Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action
This work aims to investigate the damage in ultrahigh-performance concrete (UHPC) caused by freezing-thawing action. Freezing-thawing tests were carried out on UHPCs with and without steel fibers. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray computed tomography...
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| Format: | Article |
| 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/10.1155/2018/3701682 |
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| _version_ | 1832555395170697216 |
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| author | Chunping Gu Wei Sun Liping Guo Qiannan Wang Jintao Liu Yang Yang Tao Shi |
| author_facet | Chunping Gu Wei Sun Liping Guo Qiannan Wang Jintao Liu Yang Yang Tao Shi |
| author_sort | Chunping Gu |
| collection | DOAJ |
| description | This work aims to investigate the damage in ultrahigh-performance concrete (UHPC) caused by freezing-thawing action. Freezing-thawing tests were carried out on UHPCs with and without steel fibers. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray computed tomography (X-ray CT) were applied to detect the microstructure of the UHPC matrix before and after the freezing-thawing tests. The results showed that UHPC possessed very excellent freezing-thawing resistance due to its dense microstructure. After the freezing-thawing action, cracks occurred and were prone to initiate at the sand-paste interface in the UHPC matrix. MIP results also indicated that cracks appeared in the UHPC matrix after the freezing-thawing action. The number of defects that can be seen by X-ray CT increased in UHPC after the freezing-thawing action as well. The mismatch of the thermal expansion coefficients of the aggregate and the paste is considered to be the reason for the cracking at the sand-paste interface. The steel fibers in UHPC inhibited the propagation of cracks in the matrix and improved the freezing-thawing performance of UHPC. |
| format | Article |
| id | doaj-art-d19b539a8e34415985cbbc2607f5ec83 |
| 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-d19b539a8e34415985cbbc2607f5ec832025-02-03T05:48:20ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422018-01-01201810.1155/2018/37016823701682Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing ActionChunping Gu0Wei Sun1Liping Guo2Qiannan Wang3Jintao Liu4Yang Yang5Tao Shi6College of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, ChinaSchool of Materials Science and Engineering, Southeast University, Nanjing 211189, ChinaSchool of Materials Science and Engineering, Southeast University, Nanjing 211189, ChinaSchool of Materials Science and Engineering, Southeast University, Nanjing 211189, ChinaCollege of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, ChinaCollege of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, ChinaCollege of Civil Engineering and Architecture, Zhejiang University of Technology, Hangzhou 310023, ChinaThis work aims to investigate the damage in ultrahigh-performance concrete (UHPC) caused by freezing-thawing action. Freezing-thawing tests were carried out on UHPCs with and without steel fibers. Mercury intrusion porosimetry (MIP), scanning electron microscopy (SEM), and X-ray computed tomography (X-ray CT) were applied to detect the microstructure of the UHPC matrix before and after the freezing-thawing tests. The results showed that UHPC possessed very excellent freezing-thawing resistance due to its dense microstructure. After the freezing-thawing action, cracks occurred and were prone to initiate at the sand-paste interface in the UHPC matrix. MIP results also indicated that cracks appeared in the UHPC matrix after the freezing-thawing action. The number of defects that can be seen by X-ray CT increased in UHPC after the freezing-thawing action as well. The mismatch of the thermal expansion coefficients of the aggregate and the paste is considered to be the reason for the cracking at the sand-paste interface. The steel fibers in UHPC inhibited the propagation of cracks in the matrix and improved the freezing-thawing performance of UHPC.http://dx.doi.org/10.1155/2018/3701682 |
| spellingShingle | Chunping Gu Wei Sun Liping Guo Qiannan Wang Jintao Liu Yang Yang Tao Shi Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action Advances in Materials Science and Engineering |
| title | Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action |
| title_full | Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action |
| title_fullStr | Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action |
| title_full_unstemmed | Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action |
| title_short | Investigation of Microstructural Damage in Ultrahigh-Performance Concrete under Freezing-Thawing Action |
| title_sort | investigation of microstructural damage in ultrahigh performance concrete under freezing thawing action |
| url | http://dx.doi.org/10.1155/2018/3701682 |
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