钢PVA纤维混凝土流动性及力学性能研究
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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)


Fluidity and Mechanical Properties of Steel PVA Fiber Reinforced Concrete
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    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175%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025%时下降加快;150%钢纤维和025%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125%钢纤维和050%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.

    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 175%, the fluidity of concrete decreases with the increase of PVA fiber volume fraction, and decreases when PVA fiber volume fraction is more than 025%,and when the PVA fiber volume fraction is more than 025%,the rate of decline becomes higher. When the total fiber volume fraction is 175%, the positive synergies occur in the fiber combination of 150% steel fiber and 025% PVA fiber, compressive strength to the maximum; the flexural strength reaches the maximum when the fiber combination is 125% steel fiber and 050% PVA fiber. The incorporation of PVA fibers is favorable to the multi crack cracking.

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于婧,翟天文,梁兴文,孙骁骥.钢PVA纤维混凝土流动性及力学性能研究[J].建筑材料学报,2018,21(3):402-407

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历史
  • 收稿日期:2017-07-07
  • 最后修改日期:2017-09-05
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  • 在线发布日期: 2018-07-02
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