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| 摘要: |
| 研究了不同掺量钢纤维、聚丙烯纤维对自密实活性粉末混凝土(RPC)力学性能的影响.结果表明:钢纤维的掺入提高了自密实RPC的抗压和抗折强度,尤其对抗折强度的提高非常明显,7 d抗折强度最大可提高95%,28 d抗折强度最大可提高73%;聚丙烯纤维可以提高自密实RPC 7 d抗折强度,最大可提高13%,但对抗压强度以及28 d抗折强度却起削弱作用;混杂纤维主要能提高自密实RPC的7 d抗折强度,最大可提高82%;纤维的掺加大都能降低自密实RPC的压折比,并提高其峰值荷载变形和断裂变形. |
| 关键词: 钢纤维 聚丙烯纤维 混杂纤维 自密实RPC 强度 |
| DOI： |
| 分类号:TU528.572 |
| 基金项目: |
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| Effect of Fibers on Strength of Self-compacting Reactive Powder Concrete |
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ZHONG Shi-yun WANG Ya-mei GAO Han-qing
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| Abstract: |
| The mechanical properties of self-compacting reactive powder concrete(RPC) specimens with different volume fractions of steel fiber,polypropylene fiber were investigated.Test results show that steel fiber can have an appreciable increase in compressive strength and flexural strength,especially in flexural strength and the maximum increases of 7 d and 28 d flexural strength are 95% and 73% respectively.Addition of polypropylene fiber can increase 7 d flexural strength that can be increased by 13% mostly,but has adverse effect on compressive strength and 28 d flexural strength.The 7 d flexural strength of specimen with hybrid fiber can be increased by 82% mostly.The ratio of compressive to flexural strength of self-compacting RPC can be decreased and the deflection at maximum loads and breaks of self-compacting RPC can be increased whatever kind of fiber is added. |
| Key words: steel fiber,polypropylene fiber,hybrid fiber,self-compacting reactive powder concrete,strength |
