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Review on the Durability of Polypropylene Fibre-Reinforced Concrete
Advances in Civil Engineering ( IF 1.8 ) Pub Date : 2021-06-08 , DOI: 10.1155/2021/6652077
Yanzhu Liu 1 , Liang Wang 1, 2 , Ke Cao 1 , Lei Sun 1
Affiliation  

Polypropylene fibre (PPF) is a kind of polymer material with light weight, high strength, and corrosion resistance. The crack resistance of concrete can be improved by adding PPFs. PPF can optimize the pore size distribution of concrete. As a result, the durability of concrete is significantly enhanced since PPF can block the penetration of water or harmful ions in concrete. This paper summarizes the influence of polypropylene fibre on the durability of concrete, including drying shrinkage, creep, water absorption, permeability resistance, chloride ion penetration resistance, sulfate corrosion resistance, freeze-thaw cycle resistance, carbonation resistance, and fire resistance. The authors analysed the effects of fibre content, fibre diameter, and fibre hybrid ratio on these durability indexes. The durability property of concrete can be further improved by combining PPFs and steel fibres. The drawbacks of PPF in application in concrete are the imperfect dispersion in concrete and weak bonding with cement matrix. The methods to overcome these drawbacks are to use fibre modified with nanoactive powder or chemical treatment. At last, the authors give the future research prospects of concrete made with PPFs.

中文翻译:

聚丙烯纤维混凝土耐久性研究综述

聚丙烯纤维(PPF)是一种重量轻、强度高、耐腐蚀的高分子材料。添加PPF可以提高混凝土的抗裂性。PPF可以优化混凝土的孔径分布。因此,混凝土的耐久性显着提高,因为 PPF 可以阻止水或有害离子在混凝土中的渗透。本文总结了聚丙烯纤维对混凝土耐久性的影响,包括干缩、蠕变、吸水、抗渗透、抗氯离子渗透、抗硫酸盐腐蚀、抗冻融循环、抗碳化、耐火等。作者分析了纤维含量、纤维直径和纤维混合比对这些耐久性指标的影响。PPFs与钢纤维的结合可以进一步提高混凝土的耐久性能。PPF在混凝土中应用的缺点是在混凝土中的分散不完全和与水泥基体的结合弱。克服这些缺点的方法是使用经纳米活性粉末或化学处理改性的纤维。最后,作者对PPFs混凝土的未来研究前景进行了展望。
更新日期:2021-06-08
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