Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete
Alkali-activated materials have attracted increasing interest owing to their excellent properties and environmental protection. However, there have been few studies on their creep properties. The aim of this article is to investigate the effect of the stress−strength ratio on the creep pro...
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| Format: | Article |
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MDPI AG
2019-09-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/9/18/3643 |
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| author | Xianyu Zhou Ying Wang Wenzhong Zheng Pang Chen Yusheng Zeng |
| author_facet | Xianyu Zhou Ying Wang Wenzhong Zheng Pang Chen Yusheng Zeng |
| author_sort | Xianyu Zhou |
| collection | DOAJ |
| description | Alkali-activated materials have attracted increasing interest owing to their excellent properties and environmental protection. However, there have been few studies on their creep properties. The aim of this article is to investigate the effect of the stress−strength ratio on the creep property of sodium silicate−based alkali-activated slag (AAS) concrete. For this reason, five groups of AAS concrete with different stress−strength ratios (0.15, 0.3, 0.45, 0.6, and 0.75) were tested. The results indicate that the creep of AAS concrete has a convergent nonlinear stage and a non-convergent stage but not an obvious linear stage. The AAS concrete basically has a consistent creep coefficient and diverse specific creep under a stress−strength ratio of 0.15−0.6. The elasticity modulus of AAS is much smaller than that of ordinary Portland cement (OPC) concrete, which is the reason for the greater creep compared to that in OPC concrete, and the inaccuracy of the model prediction. By applying the actual elastic modulus, the models can predict the specific creep and stress-dependent strain of AAS concrete with a 0.3 stress−strength ratio, except for the B3 model. The secant modulus of AAS concrete decreases linearly with an increase in the stress−strength ratio. Finally, we propose an improved creep model for AAS concrete with a wide stress−strength ratio based on the GL2000 model. |
| first_indexed | 2024-12-13T14:29:40Z |
| format | Article |
| id | doaj.art-a0cf14acc0334454b63a1769e58a0dcd |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-12-13T14:29:40Z |
| publishDate | 2019-09-01 |
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| spelling | doaj.art-a0cf14acc0334454b63a1769e58a0dcd2022-12-21T23:41:52ZengMDPI AGApplied Sciences2076-34172019-09-01918364310.3390/app9183643app9183643Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag ConcreteXianyu Zhou0Ying Wang1Wenzhong Zheng2Pang Chen3Yusheng Zeng4School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaSchool of Civil Engineering, Harbin Institute of Technology, Harbin 150090, ChinaAlkali-activated materials have attracted increasing interest owing to their excellent properties and environmental protection. However, there have been few studies on their creep properties. The aim of this article is to investigate the effect of the stress−strength ratio on the creep property of sodium silicate−based alkali-activated slag (AAS) concrete. For this reason, five groups of AAS concrete with different stress−strength ratios (0.15, 0.3, 0.45, 0.6, and 0.75) were tested. The results indicate that the creep of AAS concrete has a convergent nonlinear stage and a non-convergent stage but not an obvious linear stage. The AAS concrete basically has a consistent creep coefficient and diverse specific creep under a stress−strength ratio of 0.15−0.6. The elasticity modulus of AAS is much smaller than that of ordinary Portland cement (OPC) concrete, which is the reason for the greater creep compared to that in OPC concrete, and the inaccuracy of the model prediction. By applying the actual elastic modulus, the models can predict the specific creep and stress-dependent strain of AAS concrete with a 0.3 stress−strength ratio, except for the B3 model. The secant modulus of AAS concrete decreases linearly with an increase in the stress−strength ratio. Finally, we propose an improved creep model for AAS concrete with a wide stress−strength ratio based on the GL2000 model.https://www.mdpi.com/2076-3417/9/18/3643alkali activatedslagcreepstress–strength ratiocreep model |
| spellingShingle | Xianyu Zhou Ying Wang Wenzhong Zheng Pang Chen Yusheng Zeng Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete Applied Sciences alkali activated slag creep stress–strength ratio creep model |
| title | Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete |
| title_full | Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete |
| title_fullStr | Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete |
| title_full_unstemmed | Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete |
| title_short | Effect of Stress–Strength Ratio on Creep Property of Sodium Silicate–Based Alkali-Activated Slag Concrete |
| title_sort | effect of stress strength ratio on creep property of sodium silicate based alkali activated slag concrete |
| topic | alkali activated slag creep stress–strength ratio creep model |
| url | https://www.mdpi.com/2076-3417/9/18/3643 |
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