Influence of steel fiber and polyvinyl alcohol fiber on properties of high performance concrete
Influence of steel fiber and polyvinyl alcohol fiber on properties of high performance concrete
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钢纤维和聚乙烯醇纤维对高性能混凝土性能的影响
DOI：
10.1002/suco.202100775
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发表时间：
2022-03
影响因子：
3.2
通讯作者：
Dehong Wang
中科院分区：
文献类型：
--
作者：
Yanzhong Ju;Meitong Zhu;Xiaolei Zhang;Dehong Wang
为研究单纤维、单纤维和混杂纤维对高性能混凝土性能的影响，进行了钢纤维和PVA纤维增强高性能混凝土的新拌性能、抗压强度、抗折强度和韧性试验。通过几种抗弯性能分析方法和改进的抗弯韧性评价方法对混杂纤维高性能混凝土的韧性进行了评价。为了分析纤维增韧的原理以及不同纤维含量对抗弯强度的影响，采用有限元建模的方法对四点弯曲试验进行了模拟。提出了钢-PVA纤维混杂高性能混凝土抗弯强度的计算公式。结果表明，钢纤维、PVA纤维和混杂纤维均能提高高性能混凝土的强度和韧性，但PVA纤维的掺量在1%左右存在一个临界值。如果大于该值，则韧性的增强将降低。此外，钢纤维和PVA纤维在不同尺度上都能起到架桥作用，提高高性能混凝土的韧性和强度。
To investigate influence of the single steel fibers, single polyvinyl alcohol fiber (PVA) and hybrid fibers on the properties of high performance concrete (HPC), the tests of the fresh properties, compressive strength, flexural strength and toughness of HPC reinforced with steel fiber and PVA fiber were conducted. The toughness of hybrid fiber HPC was evaluated through several flexural performance analysis methods and improved flexural toughness evaluation methods. In order to analyze the fiber toughening principle and the effect of different fiber content on flexural strength, the four‐point bending test was simulated by finite element modeling. And the calculation formula of hybrid steel‐PVA fiber HPC flexural strength was proposed. The results indicate that, steel fibers, PVA fibers and hybrid fibers can both improve HPC strength and toughness, while the content of PVA fiber had a critical value about 1%. If it is greater than this value, the enhancement of toughness will be reduced. Furthermore, the steel fiber and PVA fiber can play a bridging role in different scales to improve the toughness and strength of HPC.
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