| 纤维混杂对超高性能纤维增强水泥基复合材料力学性能的影响 |
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| 引用本文： | 张浩,张丽辉,刘建忠. 纤维混杂对超高性能纤维增强水泥基复合材料力学性能的影响[J]. 土木建筑与环境工程, 2015, 37(Z2): 199-203 |
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| 作者姓名： | 张浩 张丽辉 刘建忠 |
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| 作者单位： | 东南大学 材料学科学与工程学院，南京 211189;,高性能土木工程材料国家重点实验室,南京 211110,高性能土木工程材料国家重点实验室,南京 211110 |
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| 摘 要： | 采用最紧密堆积理论对UHPFRC进行配合比设计,并通过应用Excel Solver Tool进行编程求解,实现了UHPFRCC符合体系的理论设计,利用石灰石粉改善流动性的作用得到最终配合比。基于基准配合比,研究了钢纤维与合成纤维混杂对UHPFRCC的力学性能的影响。试验结果表明:基于Dinger-Funk模型可实现自密实UHPFRCC的配合比设计;混杂纤维可增强UHPFRCC的抗压强度,但抗折强度有所降低;相比于单掺2%钢纤维的UHPFRCC,合成纤维的取代掺入均降低了UHPFRCC的抗压强度和抗折强度。
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| 关 键 词： | 超高性能纤维增强水泥基复合材料；纤维混杂；配合比；力学性能 |
| 收稿时间： | 2015-11-10 |
Effect of hybrid fibers on mechanical behavior of ultra-high performance fiber reinforced cementitious composites |
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| Zhang Hao,Zhang Lihui and Liu Jianzhong. Effect of hybrid fibers on mechanical behavior of ultra-high performance fiber reinforced cementitious composites[J]. Journal of Civil,Architectrual & Environment Engineering, 2015, 37(Z2): 199-203 |
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| Authors: | Zhang Hao Zhang Lihui Liu Jianzhong |
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| Affiliation: | School of Materials Science and Engineering , Southeast University , Nanjing 211189, P.R.China,State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211110,P.R. China and State Key Laboratory of High Performance Civil Engineering Materials, Nanjing 211110,P.R. China |
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| Abstract: | Based on the closest packing theory, combining Funk-Dinger model with Microsoft Excel Solver Tool determines the weight of cementitious materials which is used to develop the UHPFRCC. Using limestone to improve the flowability can determine the final mix proportion. Experimental results show that the maximum density theoretical model based on the Dinger-Funk equation can be applied to the mix proportion design of UHPFRCC; Hybrid fibers can increase the compressive of UHPFRCC and decrease flexural strength; compared with the UHPFRCC in corporation of 2% steel fibers, addition of synthetic fibers reduces the compressive strength and flexural strength of UHPFRCC. |
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| Keywords: | UHPFRCC hybrid fibers mix proportion mechanical behavior |
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