In this paper, discussions are made on the simulated fire test in compliance with the ISO 834 standard to study the steel fiber-reinforced concrete (SFRC) components post-fire. The selection of steel fiber dosage and aspect ratio at high temperature has an important impact on the flexural toughness of concrete components post-fire. Steel fibers are widely used because they can effectively improve the tensile, compressive and flexural properties of concrete structures. At last, the authors give the future research prospects of concrete made with PPFs. The methods to overcome these drawbacks are to use fibre modified with nanoactive powder or chemical treatment. The drawbacks of PPF in application in concrete are the imperfect dispersion in concrete and weak bonding with cement matrix. The durability property of concrete can be further improved by combining PPFs and steel fibres. The authors analysed the effects of fibre content, fibre diameter, and fibre hybrid ratio on these durability indexes. 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. As a result, the durability of concrete is significantly enhanced since PPF can block the penetration of water or harmful ions in concrete. PPF can optimize the pore size distribution of concrete. The crack resistance of concrete can be improved by adding PPFs. Polypropylene fibre (PPF) is a kind of polymer material with light weight, high strength, and corrosion resistance.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
January 2023
Categories |