Impact of Steel Fiber Volume Fraction and Morphology on the Strength of Recycled Aggregate Concrete

Steel-fiber-reinforced recycled coarse aggregate concrete (SFRCAC) has great potential for use in structural members due to environmental and economic reasons. A comparison of SF’s reinforcing effect on the strength RCAC with natural (NCAC) was conducted through experiments analysis. Three types steel fiber—milling (MF), shear-wave (SWF), both-end hooked (BF)—were used. The SF volume fraction (Vf) taken as 0, 0.5%, 1.0%, 1.5%, 2%. results show that a similar NCAC RCAC. is relevant matrix. suitable content range from 0.5% 1.5% terms reinforcement effects compressive (ffcu) splitting tensile (ffts) higher aspect ratio (AR) better flexural (fftm) equations ffts/fts fftm/ftm characteristic parameters fiber (λf) were put forward accurately determine dosage SF.