| 摘要: |
| 通过18组试件的试验，对钢聚乙烯醇（PVA）混杂纤维混凝土的流动性、抗压强度、破坏形式及钢纤维与PVA纤维的协同作用进行了研究.结果表明，混杂纤维总掺量（体积分数，下同）为175%时，混凝土的流动性会随着PVA纤维掺量的提高而降低，且在PVA纤维掺量大于025%时下降加快；150%钢纤维和025%PVA纤维的纤维组合会发生正协同作用，使混凝土抗压强度达到最大；纤维组合为125%钢纤维和050%PVA纤维时混凝土抗折强度最大；PVA纤维的掺入有利于混凝土受压破坏的多缝开展. |
| 关键词: 钢聚乙烯醇混杂纤维 协同效应 流动性 抗压强度 抗折强度 韧性 |
| DOI：103969/j.issn.1007 9629201803009 |
| 分类号: |
| 基金项目:陕西省教育厅专项科研计划项目（16JK1449）；西安建筑科技大学人才科技基金项目（RC1233） |
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| Fluidity and Mechanical Properties of Steel PVA Fiber Reinforced Concrete |
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YU Jing1, ZHAI Tianwen1, LIANG Xingwen1, SUN Xiaoji2
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1.College of Civil Engineering, Xian University of Architecture & Technology, Xian 710055, China;2.Xian Changqing Technology Engineering Co., Ltd., Xian 710018, China
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| Abstract: |
| The fluidity, compressive strength, flexural strength, failure mode and the synergistic effect of steel PVA fiber reinforced concrete were studied by 18sets of specimens. The results show that when the total fiber volume fraction is 175%, the fluidity of concrete decreases with the increase of PVA fiber volume fraction, and decreases when PVA fiber volume fraction is more than 025%，and when the PVA fiber volume fraction is more than 025%，the rate of decline becomes higher. When the total fiber volume fraction is 175%, the positive synergies occur in the fiber combination of 150% steel fiber and 025% PVA fiber, compressive strength to the maximum; the flexural strength reaches the maximum when the fiber combination is 125% steel fiber and 050% PVA fiber. The incorporation of PVA fibers is favorable to the multi crack cracking. |
| Key words: steel PVA hybrid fiber concrete synergies effects fluidity compressive strength flexural strength ductility |
