Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material
Hydration process, products, microstructure, and compressive strength of steel slag in alkaline environments at room and high temperature were investigated. Results show that high-temperature curing significantly promotes the early hydration, causing more products. The promoting effect of temperatur...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2024-03-01
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| Series: | Developments in the Built Environment |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666165923001965 |
| _version_ | 1797267095132569600 |
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| author | Jianwei Sun Shaoyun Hou Yuehao Guo Wei He Yifei Cui Peng Zhang |
| author_facet | Jianwei Sun Shaoyun Hou Yuehao Guo Wei He Yifei Cui Peng Zhang |
| author_sort | Jianwei Sun |
| collection | DOAJ |
| description | Hydration process, products, microstructure, and compressive strength of steel slag in alkaline environments at room and high temperature were investigated. Results show that high-temperature curing significantly promotes the early hydration, causing more products. The promoting effect of temperature becomes more apparent with higher activator content. The cumulative heat apparently increases by approximately twice at 6% alkali content. Increasing temperature has no effect on the types of products and hydration of inactive components. The products remain as Ca(OH)2 and C-(A)-S-H, but Ca/Si and Al/Si ratios significantly increase from 1.42 to 2.41 and from 0.14 to 0.21, respectively. High-temperature curing makes matrix denser, resulting in a substantial increase in the early strength. However, promoting effect on the strength diminishes over time. The growth rates of 28 d strength are only −1% and 4% at different alkali content. Moreover, alkali-activated steel slag material has great potential in the field of low-carbon cementitious materials. |
| first_indexed | 2024-03-08T16:31:58Z |
| format | Article |
| id | doaj.art-1888e6575b3c4d0e925eaf8bb1b5d5ed |
| institution | Directory Open Access Journal |
| issn | 2666-1659 |
| language | English |
| last_indexed | 2024-04-25T01:11:08Z |
| publishDate | 2024-03-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Developments in the Built Environment |
| spelling | doaj.art-1888e6575b3c4d0e925eaf8bb1b5d5ed2024-03-10T05:12:54ZengElsevierDevelopments in the Built Environment2666-16592024-03-0117100314Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious materialJianwei Sun0Shaoyun Hou1Yuehao Guo2Wei He3Yifei Cui4Peng Zhang5School of Civil Engineering, Qingdao University of Technology, China; Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, ChinaSchool of Civil Engineering, Qingdao University of Technology, China; Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, ChinaSchool of Civil Engineering, Qingdao University of Technology, China; Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, ChinaSchool of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, ChinaSchool of Civil Engineering, Qingdao University of Technology, China; Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, ChinaSchool of Civil Engineering, Qingdao University of Technology, China; Engineering Research Center of Concrete Technology under Marine Environment, Ministry of Education, China; Corresponding author. School of Civil Engineering, Qingdao University of Technology, China.Hydration process, products, microstructure, and compressive strength of steel slag in alkaline environments at room and high temperature were investigated. Results show that high-temperature curing significantly promotes the early hydration, causing more products. The promoting effect of temperature becomes more apparent with higher activator content. The cumulative heat apparently increases by approximately twice at 6% alkali content. Increasing temperature has no effect on the types of products and hydration of inactive components. The products remain as Ca(OH)2 and C-(A)-S-H, but Ca/Si and Al/Si ratios significantly increase from 1.42 to 2.41 and from 0.14 to 0.21, respectively. High-temperature curing makes matrix denser, resulting in a substantial increase in the early strength. However, promoting effect on the strength diminishes over time. The growth rates of 28 d strength are only −1% and 4% at different alkali content. Moreover, alkali-activated steel slag material has great potential in the field of low-carbon cementitious materials.http://www.sciencedirect.com/science/article/pii/S2666165923001965High-temperature curingWater glassSteel slagHydrationMicrostructure |
| spellingShingle | Jianwei Sun Shaoyun Hou Yuehao Guo Wei He Yifei Cui Peng Zhang Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material Developments in the Built Environment High-temperature curing Water glass Steel slag Hydration Microstructure |
| title | Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material |
| title_full | Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material |
| title_fullStr | Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material |
| title_full_unstemmed | Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material |
| title_short | Effects of high-temperature curing on hydration and microstructure of alkali-activated typical steel slag cementitious material |
| title_sort | effects of high temperature curing on hydration and microstructure of alkali activated typical steel slag cementitious material |
| topic | High-temperature curing Water glass Steel slag Hydration Microstructure |
| url | http://www.sciencedirect.com/science/article/pii/S2666165923001965 |
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