Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack
In this study, the mechanical behaviors, failure characteristics, and microstructure of concrete containing fly ash (FA) against combined freeze-thaw cycles and sulfate attack were studied compared with normal concrete, and the formation rates of corrosion products during coupling cycles were invest...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Advances in Materials Science and Engineering |
| Online Access: | http://dx.doi.org/10.1155/2020/8032849 |
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| _version_ | 1832561152852230144 |
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| author | Wei Tian Fangfang Gao |
| author_facet | Wei Tian Fangfang Gao |
| author_sort | Wei Tian |
| collection | DOAJ |
| description | In this study, the mechanical behaviors, failure characteristics, and microstructure of concrete containing fly ash (FA) against combined freeze-thaw cycles and sulfate attack were studied compared with normal concrete, and the formation rates of corrosion products during coupling cycles were investigated. Results showed that, during the coupling action of freeze-thaw cycles and sodium sulfate solution, concrete containing 10% fly ash exposed in 5% sodium sulfate solution exhibited better freeze-thaw resistance. Meanwhile, the variation of compressive strength of concrete during the coupling cycles could be divided into two stages, including the strength enhancement stage and the strength reduction stage. Moreover, the proportion of micropores and capillary pores decreased obviously during combined freeze-thaw cycles and sulfate attack, and excessive concentration of sodium sulfate solution led to more macropores after high-frequency freeze-thaw cycles. |
| format | Article |
| id | doaj-art-78ecab9ca90b411c80358b3c827e564f |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-78ecab9ca90b411c80358b3c827e564f2025-02-03T01:25:49ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/80328498032849Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate AttackWei Tian0Fangfang Gao1School of Civil Engineering, Chang’an University, Xi’an 710061, ChinaSchool of Civil Engineering, Chang’an University, Xi’an 710061, ChinaIn this study, the mechanical behaviors, failure characteristics, and microstructure of concrete containing fly ash (FA) against combined freeze-thaw cycles and sulfate attack were studied compared with normal concrete, and the formation rates of corrosion products during coupling cycles were investigated. Results showed that, during the coupling action of freeze-thaw cycles and sodium sulfate solution, concrete containing 10% fly ash exposed in 5% sodium sulfate solution exhibited better freeze-thaw resistance. Meanwhile, the variation of compressive strength of concrete during the coupling cycles could be divided into two stages, including the strength enhancement stage and the strength reduction stage. Moreover, the proportion of micropores and capillary pores decreased obviously during combined freeze-thaw cycles and sulfate attack, and excessive concentration of sodium sulfate solution led to more macropores after high-frequency freeze-thaw cycles.http://dx.doi.org/10.1155/2020/8032849 |
| spellingShingle | Wei Tian Fangfang Gao Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack Advances in Materials Science and Engineering |
| title | Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack |
| title_full | Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack |
| title_fullStr | Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack |
| title_full_unstemmed | Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack |
| title_short | Damage and Degradation of Concrete under Coupling Action of Freeze-Thaw Cycle and Sulfate Attack |
| title_sort | damage and degradation of concrete under coupling action of freeze thaw cycle and sulfate attack |
| url | http://dx.doi.org/10.1155/2020/8032849 |
| work_keys_str_mv | AT weitian damageanddegradationofconcreteundercouplingactionoffreezethawcycleandsulfateattack AT fangfanggao damageanddegradationofconcreteundercouplingactionoffreezethawcycleandsulfateattack |