Experimental and Numerical Investigation on Carbon Fiber Reinforced Cement

The objective of this study is to enhance the mechanical properties of high-early-strength cement for emergency repair of reinforced concrete infrastructure by incorporating short carbon fibers. The short carbon fibers, with weight ratios of 0.5 to 2.0% and lengths of 12 and 24 mm, were added to the high-early-strength cement and the resulting material was subjected to compressive and impact testing to determine its compressive strength and impact resistance. A micromechanical model was developed based on the results of the compressive testing to estimate the modulus of fiber-reinforced cement paste. The data from the experimental and micromechanical analyses were used as material parameters in a finite-element model, and the behavior of the fiber-reinforced cement under single impact testing was simulated using LS-DYNA.