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摘要文章研究了多尺度纤文混杂的超高性能混凝土（UHPC），提出了不同纤文的混杂设计，并且制备了相应的试样并且测试了它们的力学性能。其中所加的纤文有钢纤文、PVA纤文、碳化硅晶须以及玄武岩纤文。实验结果表明，实验中掺入的纤文皆可以提高UHPC的抗弯强度和抗压强度，但是性能的提升程度有所不同。钢纤文作为基础的纤文，掺入后UHPC的力学性能比未掺时有所提高，并且钢纤文掺量越高，性能越强。PVA纤文与钢纤文复合的试样，在混杂纤文里面强度最高。本文还研究了不同尺寸钢纤文对UHPC性能的影响，较长的钢纤文有着更好的性能。另外本文研究了超高含量钢纤文水泥基复合材料的新型制备方法------浇筑法。利用此方法制得的6%钢纤文含量的UHPC，抗弯强度比3%含量的试样高69%。28724
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关键词 UHPC 纤文增强 混杂 钢纤文 力学性能
毕业设计说明书（毕业论文）外文摘要
Title Optimal Design and Performance Study of Multi-scale Fiber-reinforced Cement-based Composite Materials
Abstract
The experimental study was conducted to explore the field of multi-scale fiber-reinforced ultra-high performance concrete(UHPC). Not only a variety of mixing designs were proposed, but also the corresponding samples were prepared along with the material test. Fibers included steel fiber,PVA fiber, SiC whisker and basalt fiber. The experimental result showed that with the addition of any fiber, the bending strength and compressive strength were increased, but differed in extent. Steel fiber, as the fundamental fiber, shared the same result, the more steel fiber mixed,the higher strength would get. The sample of a mixture of steel fiber and PVA fiber was at the top of all. This paper also studied the influence of UHPC strength by changing different scale of steel fiber. As an extra research， new ways of preparation was studied------pouring method. The result of this method------6% steel fiber contained UHPC, viewed an drastic increase in bending strength------69% higher than 3% steel fiber contained UHPC.
Keywords UHPC Fiber-reinforced Hybrid Steel fiber Strength
目 次
1 引言（绪论） 1
1.1 超高性能混凝土 1
1.2 纤文增强水泥基复合材料 1
1.3 混杂纤文增强水泥基复合材料 2
1.4 多尺度混杂纤文增强水泥基复合材料 3
1.5 钢纤文水泥基复合材料 3
1.6 PVA 纤文水泥基复合材料 3
1.7 玄武岩纤文增强水泥基复合材料 4
2 实验 5
2.1 原材料 5
2.2 仪器与设备 5
2.3 水泥基复合材料制备 6
2.3.1 空白试样制备 6
2.3.2 掺入钢纤文的水泥基复合材料制备 6
2.3.3 掺入混杂有钢纤文、PVA纤文的水泥基复合材料制备 6
2.3.4 掺入混杂有钢纤文、碳化硅晶须的水泥基复合材料制备 7
2.3.5 掺入混杂有钢纤文、玄武岩纤文的水泥基复合材料制备 7
2.3.5 掺入混杂有钢纤文、玄武岩纤文和PVA纤文的试样制备 7