| Cite this article: | 常世举,陈小攀,贾朋,等.纤维素纤维增强面板混凝土制备与机理研究[J].灌溉排水学报,0,():-. |
| CHANG Shi-ju,CHEN Xiao-pan,JIA Peng,et al.纤维素纤维增强面板混凝土制备与机理研究[J].灌溉排水学报,0,():-. |
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| DOI： |
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| Preparation of Reinforced Cellulose Fiber Panel Concrete and its Strengthening?Mechanism |
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CHANG Shi-ju, CHEN Xiao-pan, JIA Peng, YU Chuan-yong, WANG Li-kui, ZHAO Jie
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Henan Tianchi Pumped Storage Company Ltd,Nanyang
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| Abstract: |
| In order to improve the crack resistance of the face slab concrete, a number of experimental studies on concrete slabs with different mix proportions were carried out. Three different combinations of the face slab concrete are tested respectively, which are single mixed with fly ash, mixed with fly ash and MgO, mixed with fly ash and cellulose fiber. The mechanical properties, deformation properties, crack resistance of the large slab by ring method and micro early crack resistance of the concrete are studied,and the anti-cracking mechanism is analyzed. The results show that the effect of concrete mixed with fly ash and fiber is the best, the splitting tensile strength and ultimate tensile value are the highest, the initial crack starts at the latest, and the number of cracks per unit area is the least, the development of early cracks in cement paste is restrained, and the crack resistance is the best. In addition, the SEM analysis shows that the structure of the 90 days old concrete samples mixed with fly ash and fiber is relatively compact, and a large number of cluster like short rod products are formed in the later stage. The energy spectrum analysis shows that the proportion of calcium in the products decreases, the proportion of silicon and aluminum increases, the hydration of fly ash consumes a certain amount of calcium in the later stage, reduces the calcium silicon ratio of the products, and the products formed are further filled tightly. In fact, the strength has been greatly improved. |
| Key words: cellulosic fiber concrete; face slab concrete; crack resistance |
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