Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash
Concrete mixtures consisting of nanomaterials and fly ash have been shown to be effective for improving the performance of concrete. This study investigates the combined effects of nano-CaCO3 and fly ash on the mechanical properties and durability of concrete; the mix proportion is optimized through...
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| Main Authors: | , , , , |
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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/10.1155/2020/7365862 |
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| author | Yanqun Sun Peng Zhang Weina Guo Jiuwen Bao Chengping Qu |
| author_facet | Yanqun Sun Peng Zhang Weina Guo Jiuwen Bao Chengping Qu |
| author_sort | Yanqun Sun |
| collection | DOAJ |
| description | Concrete mixtures consisting of nanomaterials and fly ash have been shown to be effective for improving the performance of concrete. This study investigates the combined effects of nano-CaCO3 and fly ash on the mechanical properties and durability of concrete; the mix proportion is optimized through orthogonal experiments. In the first phase, nine concrete mixtures were prepared with three water-to-binder ratios (0.4, 0.5, and 0.6), three fly ash contents (15%, 20%, and 25% replacement of the cement weight), and three nano-CaCO3 contents (1%, 2%, and 3% replacement of the cement weight). Based on the orthogonal analysis, the optimal concrete mix proportion was determined as a water-to-binder ratio of 0.4, 20% fly ash, and 1% nano-CaCO3. In the second phase, further investigations were carried out to examine the superiority of the optimal concrete and evaluate the synergistic effect of nano-CaCO3 and fly ash. The results showed that nano-CaCO3 contributed to increasing the compressive strength of fly ash concrete at the early ages, but its effect was quite limited at later ages. Furthermore, the scanning electron microscopy analysis revealed that the seeding effect, filling effect, and pozzolanic effect were the primary mechanisms for the improvement of concrete performance. |
| format | Article |
| id | doaj-art-8a930ef9b55b4f64a6529dcd49b542b4 |
| 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-8a930ef9b55b4f64a6529dcd49b542b42025-02-03T01:30:31ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422020-01-01202010.1155/2020/73658627365862Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly AshYanqun Sun0Peng Zhang1Weina Guo2Jiuwen Bao3Chengping Qu4School of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaSchool of Civil Engineering, Qingdao University of Technology, Qingdao 266033, ChinaConcrete mixtures consisting of nanomaterials and fly ash have been shown to be effective for improving the performance of concrete. This study investigates the combined effects of nano-CaCO3 and fly ash on the mechanical properties and durability of concrete; the mix proportion is optimized through orthogonal experiments. In the first phase, nine concrete mixtures were prepared with three water-to-binder ratios (0.4, 0.5, and 0.6), three fly ash contents (15%, 20%, and 25% replacement of the cement weight), and three nano-CaCO3 contents (1%, 2%, and 3% replacement of the cement weight). Based on the orthogonal analysis, the optimal concrete mix proportion was determined as a water-to-binder ratio of 0.4, 20% fly ash, and 1% nano-CaCO3. In the second phase, further investigations were carried out to examine the superiority of the optimal concrete and evaluate the synergistic effect of nano-CaCO3 and fly ash. The results showed that nano-CaCO3 contributed to increasing the compressive strength of fly ash concrete at the early ages, but its effect was quite limited at later ages. Furthermore, the scanning electron microscopy analysis revealed that the seeding effect, filling effect, and pozzolanic effect were the primary mechanisms for the improvement of concrete performance.http://dx.doi.org/10.1155/2020/7365862 |
| spellingShingle | Yanqun Sun Peng Zhang Weina Guo Jiuwen Bao Chengping Qu Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash Advances in Materials Science and Engineering |
| title | Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash |
| title_full | Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash |
| title_fullStr | Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash |
| title_full_unstemmed | Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash |
| title_short | Effect of Nano-CaCO3 on the Mechanical Properties and Durability of Concrete Incorporating Fly Ash |
| title_sort | effect of nano caco3 on the mechanical properties and durability of concrete incorporating fly ash |
| url | http://dx.doi.org/10.1155/2020/7365862 |
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