Effects of Steel Fiber Percentage and Aspect Ratios on Fresh and Harden Properties of Ultra-High Performance Fiber Reinforced Concrete

Applied Mechanics

Zahid Hasan¹  Md. Ehsanul Haque¹  Farabi Bin Ahmed¹  Afra Anam Provasha¹  Debasish Sen¹  Faria Hayat¹  Rajib Kumar Biswas² 

[1] Department of Civil Engineering, Ahsanullah University of Science and Technology, Tejgaon, Dhaka Industrial Area, Dhaka 1208, Bangladesh;Department of Civil and Environmental Engineering, Tokyo Institute of Technology, 2-12-1-M1-21, Ookayama, Meguro-ku 152-8552, Japan;

关键词: fiber percentage;    aspect ratio;    setting time;    workability;    loading rate;   

DOI  :  10.3390/applmech2030028

来源: DOAJ

【 摘 要 】

Steel fibers and their aspect ratios are important parameters that have significant influence on the mechanical properties of ultrahigh-performance fiber-reinforced concrete (UHPFRC). Steel fiber dosage also significantly contributes to the initial manufacturing cost of UHPFRC. This study presents a comprehensive literature review of the effects of steel fiber percentages and aspect ratios on the setting time, workability, and mechanical properties of UHPFRC. It was evident that (1) an increase in steel fiber dosage and aspect ratio negatively impacted workability, owing to the interlocking between fibers; (2) compressive strength was positively influenced by the steel fiber dosage and aspect ratio; and (3) a faster loading rate significantly improved the mechanical properties. There were also some shortcomings in the measurement method for setting time. Lastly, this research highlights current issues for future research. The findings of the study are useful for practicing engineers to understand the distinctive characteristics of UHPFRC.

【 授权许可】

Unknown