Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag
In order to investigate the effect of temperature and pH on the early hydration rate of alkali-activated slag (AAS), NaOH was used as alkali activator, and the nonevaporable water (NEW) content of the slag paste at different temperatures (5, 20 and 35°C) and pH (12.10, 12.55, 13.02, and 13.58) was m...
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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/10.1155/2019/3531543 |
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| author | Ping Li Jianhui Tang Xudong Chen Yin Bai Qiyao Li |
| author_facet | Ping Li Jianhui Tang Xudong Chen Yin Bai Qiyao Li |
| author_sort | Ping Li |
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| description | In order to investigate the effect of temperature and pH on the early hydration rate of alkali-activated slag (AAS), NaOH was used as alkali activator, and the nonevaporable water (NEW) content of the slag paste at different temperatures (5, 20 and 35°C) and pH (12.10, 12.55, 13.02, and 13.58) was measured. On the basis of the Arrhenius formula, the hydration rate of slag was characterized by the content of nonevaporative water, and the apparent activation energy of slag hydration at different pH was also obtained. The early hydration rate of slag was significantly affected by temperature and pH of activator solution. The apparent activation energy Ea of slag decreased with the increase of pH, and there was a good linear relationship between them. When pH was less than 13.02, increasing the temperature can accelerate the hydration rate of slag. However, under the condition of high pH (pH = 13.58), the hydration rate of slag was negatively correlated with temperature, which was related to the “shell forming” phenomenon of slag hydration. |
| format | Article |
| id | doaj-art-e2df6af869724820a38cfbc23259822e |
| institution | Kabale University |
| issn | 1687-8434 1687-8442 |
| language | English |
| publishDate | 2019-01-01 |
| publisher | Wiley |
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| series | Advances in Materials Science and Engineering |
| spelling | doaj-art-e2df6af869724820a38cfbc23259822e2025-02-03T05:58:39ZengWileyAdvances in Materials Science and Engineering1687-84341687-84422019-01-01201910.1155/2019/35315433531543Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated SlagPing Li0Jianhui Tang1Xudong Chen2Yin Bai3Qiyao Li4College of Civil and Transportation Engineering, Hohai University, No. 1 XiKang Road, Nanjing 210098, ChinaCollege of Civil and Transportation Engineering, Hohai University, No. 1 XiKang Road, Nanjing 210098, ChinaCollege of Civil and Transportation Engineering, Hohai University, No. 1 XiKang Road, Nanjing 210098, ChinaNanjing Hydraulic Research Institute, State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, No. 34 Hujuguan, Nanjing 210029, ChinaCollege of Civil and Transportation Engineering, Hohai University, No. 1 XiKang Road, Nanjing 210098, ChinaIn order to investigate the effect of temperature and pH on the early hydration rate of alkali-activated slag (AAS), NaOH was used as alkali activator, and the nonevaporable water (NEW) content of the slag paste at different temperatures (5, 20 and 35°C) and pH (12.10, 12.55, 13.02, and 13.58) was measured. On the basis of the Arrhenius formula, the hydration rate of slag was characterized by the content of nonevaporative water, and the apparent activation energy of slag hydration at different pH was also obtained. The early hydration rate of slag was significantly affected by temperature and pH of activator solution. The apparent activation energy Ea of slag decreased with the increase of pH, and there was a good linear relationship between them. When pH was less than 13.02, increasing the temperature can accelerate the hydration rate of slag. However, under the condition of high pH (pH = 13.58), the hydration rate of slag was negatively correlated with temperature, which was related to the “shell forming” phenomenon of slag hydration.http://dx.doi.org/10.1155/2019/3531543 |
| spellingShingle | Ping Li Jianhui Tang Xudong Chen Yin Bai Qiyao Li Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag Advances in Materials Science and Engineering |
| title | Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag |
| title_full | Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag |
| title_fullStr | Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag |
| title_full_unstemmed | Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag |
| title_short | Effect of Temperature and pH on Early Hydration Rate and Apparent Activation Energy of Alkali-Activated Slag |
| title_sort | effect of temperature and ph on early hydration rate and apparent activation energy of alkali activated slag |
| url | http://dx.doi.org/10.1155/2019/3531543 |
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