| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Influence of Expansion Agent and Shrinkage Reducing Agent on Circular Restrained Shrinkage of UHPC |
| DENG Zongcai1 , ZHAO Lianzhi2, LIAN Yihong1
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1 College of Architecture and Civil Engineering, Beijing University of Technology, Beijing 100124, China
2 China Road and Bridge Corporation, Beijing 100011, China |
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Abstract In order to research the effect of expansion agent or shrinkage reducing agent on the circular restrained shrinkage of UHPC, experimental study on splitting tensile strength, elastic modulus and circular restrained shrinkage of UHPC with expansion agent or shrinkage reducing agent was carried out. The cracking risk and relaxation property of UHPC with expansion agent or shrinkage reducing agent were quantitatively analyzed. The results show that the splitting tensile strength after 7 d of age of UHPC was improved by adding expansion agent or shrinkage reducing agent. The strain of steel ring in each stage was reduced by adding expansion agent or shrinkage reducing agent and the maximum reduction range was 30.7% and 38.6% in 28 d. The tensile stress level of UHPC at all ages decreased to the safe control value with the addition of expansion agent. Among them, when the content of expansion agent was 6%, the effect of reduction was the best.
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Published: 01 July 2021
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| Fund:Key Projects of Beijing Education Commission(KZ201810005008). |
| About author:: Zongcai Deng, is currently a professor and doctoral supervisor of Beijing University of Technology. He has long been engaged in research on modern engineering materials and their structures. He presided over 1 national 863 Project, presided over or participated in the completion of 7 National Natural Science Foundations. He has published more than 300 academic papers in important academic journals, more than 20 papers in well-known foreign academic journals, and has been indexed by SCI and EI more than 200 times. |
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2021, Vol. 35 
