Materials Reports  2020, Vol. 34 Issue (Z1): 229-233 |
| INORGANIC MATERIALS AND CERAMIC MATRIX COMPOSITES |
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| Study on Bending Properties of Hybrid Fiber Reinforced Strain HardeningCementitious Composites |
| YU Haiyang, LI Dihong, DAI Hanhan, GAO Qun
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| College of Civil and Transportation Engineering, Beijing University of Civil Engineering and Architecture, Beijing 100044, China |
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Abstract The bending properties of polyvinyl alcohol-basalt fiber hybrid strain hardening cementitious composites (PB-SHCC) were studied in this paper. The water-binder ratio of cement matrix material was 0.25, the volume content of polyvinyl alcohol fiber in the hybrid system was 1.5% and 1.7% respectively, and then mixed with a certain volume content of basalt fiber to prepare polyvinyl alcohol-basalt fiber hybrid strain hardening cement matrix composites. A three-point bending test was carried out after standard curing for 28 d of the PB-SHCC. The test results show that PB-SHCC has the characteristics of bending strain hardening, and the bending deflection will be weakened compared with the single blending system, but the weakening degree is not great, and it still has high ductility; when the content of basalt fiber is 0.1%—0.3% and 0.8%—1.0%, it is beneficial to the improvement of initial crack strength and bending strength of the composites. In the evaluation of bending toughness, based on ASTM C1018 and JSCE-SF4 standards, the bending toughness index and bending toughness factor are improved and defined, which can succinctly and effectively evaluate the bending toughness of SHCC materials. The two indexes have a good agreement.
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Published: 01 July 2020
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| Fund:This study was financially supported by the BUCEA Post Graduate Innovation Project. |
| About author:: Haiyang Yu, graduated from the civil engineering major of Tibet University in 2013, worked in the College of Agriculture and Animal Husbandry of Tibet University (now Tibet Agricultural and Animal Husbandry University) from 2013 to 2017, and is now a postgraduate of the College of Civil and Traffic Engineering of Beijing Jianzhu University, engaged in the research of civil engineering materials. At present, the main research direction is fiber-reinforced cement-based composites and engineering cement-based composites ; Dihong Li, professor and postgraduate supervisor of Beijing University of Civil Engineering and Architecture, received his doctorate from Harbin Architectural University in 1998. From 1986 to 2014, he worked in the School of Materials Science and Engineering of Harbin Institute of Technology. Since 2014, he has worked in the School of Civil and Transportation Engineering of Beijing University of Civil Engineering and Architecture. From 2000 to 2001, as a visiting scholar, he was engaged in the research on the structure of outfit materials-ship material evaluation at the University of Tokyo in Japan. Professor Li has been engaged in the teaching and scientific research of polymer matrix composites for many years, mainly studying the structural analysis, structural design, and the integrated design of structure and technology of polymer matrix composites. He has participated in the research work of the special project of large aircraft, Fengyun satellite sub-project, and the weight reduction of flying weapons, and won the second prize of the Science and Technology Progress Award of the Chinese people's Liberation Army. In recent years, the team is mainly engaged in the research of low-energy impact damage characterization technology of composite laminates, embedded concrete reinforcement technology and fiber reinforced cement-based composites. |
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