Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism
The rapid drop in internal temperature of mass concrete can readily lead to temperature cracks. Hydration heat inhibitors reduce the risk of concrete cracking by reducing the temperature during the hydration heating phase of cement-based material but may reduce the early strength of the cement-based...
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| Format: | Article |
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MDPI AG
2023-04-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/8/2992 |
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| author | Tian Liang Penghui Luo Zhongyang Mao Xiaojun Huang Min Deng Mingshu Tang |
| author_facet | Tian Liang Penghui Luo Zhongyang Mao Xiaojun Huang Min Deng Mingshu Tang |
| author_sort | Tian Liang |
| collection | DOAJ |
| description | The rapid drop in internal temperature of mass concrete can readily lead to temperature cracks. Hydration heat inhibitors reduce the risk of concrete cracking by reducing the temperature during the hydration heating phase of cement-based material but may reduce the early strength of the cement-based material. Therefore, in this paper, the influence of commercially available hydration temperature rise inhibitors on concrete temperature rise is studied from the aspects of macroscopic performance and microstructure characteristics, and their mechanism of action is analyzed. A fixed mix ratio of 64% cement, 20% fly ash, 8% mineral powder and 8% magnesium oxide was used. The variable was different admixtures of hydration temperature rise inhibitors at 0%, 0.5%, 1.0% and 1.5% of the total cement-based materials. The results showed that the hydration temperature rise inhibitors significantly reduced the early compressive strength of concrete at 3 d, and the greater the amount of hydration temperature rise inhibitors, the more obvious the decrease in concrete strength. With the increase in age, the influence of hydration temperature rise inhibitor on the compressive strength of concrete gradually decreased, and the decrease in compressive strength at 7 d was less than that at 3 d. At 28 d, the compressive strength of the hydration temperature rise inhibitor was about 90% in the blank group. XRD and TG confirmed that hydration temperature rise inhibitors delay early hydration of cement. SEM showed that hydration temperature rise inhibitors delayed the hydration of Mg(OH)<sub>2</sub>. |
| first_indexed | 2024-03-11T04:49:28Z |
| format | Article |
| id | doaj.art-d4ea689ac0d3470e9439a06f996143ec |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T04:49:28Z |
| publishDate | 2023-04-01 |
| publisher | MDPI AG |
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| series | Materials |
| spelling | doaj.art-d4ea689ac0d3470e9439a06f996143ec2023-11-17T20:11:30ZengMDPI AGMaterials1996-19442023-04-01168299210.3390/ma16082992Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its MechanismTian Liang0Penghui Luo1Zhongyang Mao2Xiaojun Huang3Min Deng4Mingshu Tang5College of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaCollege of Materials Science and Engineering, Nanjing Tech University, Nanjing 211800, ChinaThe rapid drop in internal temperature of mass concrete can readily lead to temperature cracks. Hydration heat inhibitors reduce the risk of concrete cracking by reducing the temperature during the hydration heating phase of cement-based material but may reduce the early strength of the cement-based material. Therefore, in this paper, the influence of commercially available hydration temperature rise inhibitors on concrete temperature rise is studied from the aspects of macroscopic performance and microstructure characteristics, and their mechanism of action is analyzed. A fixed mix ratio of 64% cement, 20% fly ash, 8% mineral powder and 8% magnesium oxide was used. The variable was different admixtures of hydration temperature rise inhibitors at 0%, 0.5%, 1.0% and 1.5% of the total cement-based materials. The results showed that the hydration temperature rise inhibitors significantly reduced the early compressive strength of concrete at 3 d, and the greater the amount of hydration temperature rise inhibitors, the more obvious the decrease in concrete strength. With the increase in age, the influence of hydration temperature rise inhibitor on the compressive strength of concrete gradually decreased, and the decrease in compressive strength at 7 d was less than that at 3 d. At 28 d, the compressive strength of the hydration temperature rise inhibitor was about 90% in the blank group. XRD and TG confirmed that hydration temperature rise inhibitors delay early hydration of cement. SEM showed that hydration temperature rise inhibitors delayed the hydration of Mg(OH)<sub>2</sub>.https://www.mdpi.com/1996-1944/16/8/2992hydration heat inhibitorheat of hydrationconcretedegree of hydration |
| spellingShingle | Tian Liang Penghui Luo Zhongyang Mao Xiaojun Huang Min Deng Mingshu Tang Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism Materials hydration heat inhibitor heat of hydration concrete degree of hydration |
| title | Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism |
| title_full | Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism |
| title_fullStr | Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism |
| title_full_unstemmed | Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism |
| title_short | Effect of Hydration Temperature Rise Inhibitor on the Temperature Rise of Concrete and Its Mechanism |
| title_sort | effect of hydration temperature rise inhibitor on the temperature rise of concrete and its mechanism |
| topic | hydration heat inhibitor heat of hydration concrete degree of hydration |
| url | https://www.mdpi.com/1996-1944/16/8/2992 |
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