Performance evaluation of Ultrahigh performance fibre reinforced concrete - A review

摘要

Ultrahigh performance fibre reinforced concrete (UHPFRC) is a newfangled cement-based material unveiling a compressive strength of more than 150 MPa, higher tensile and flexural strengths, ductility as well as admirable durability. This review of the past researches on diverse influential features is vital in obtaining fundamental data for its viability for the application. Consequently, this study aimed to review the available literatures on UHPFRCs that examine the attributes of ideal UHPFRC, such as mechanical properties viz., compressive, tensile and flexural strengths; mixing proportions and environment friendliness; curing regimes; effect of specimens size on its compressive, flexural and tensile strength as well as loading rate; effects of fibre properties - type, geometry, length, and volume fractions, orientation and quantity attributes of UHPFRC is endeavoured along with relevant discussion. Subsequently, the best UHPFRC mixture was determined to be obtainable with 2% to 3% of steel fibre content and water/cement ratio of <0.2. Additionally, the UHPFRCs that were subjected to curing at 90 degrees C yielded compressive, tensile, and flexural strengths that were 49% better than the samples cured at 20 degrees C. The review elucidates the key points of producing environmental friendly UHPFRC material for future applications as the current UHPFRC contains about twice the amount of cement compared to ordinary concrete. (C) 2019 Elsevier Ltd. All rights reserved.