Influence of adding short carbon fibers on the flexural behavior of textile-reinforced concrete one-way slab
Amer M. Ibrahim, Suhad M. Abd, Omar H. Hussein, Bassam A. Tayeh, Hadee Mohammed Najm, Shaker Qaidi
Abstract
The application of textile reinforcement to the tension zone of the reinforced concrete slabs as a means to enhance flexural capacity has been investigated by researchers in the past. However, the effectiveness of adding short carbon fibers as internal reinforcement in the textile-reinforced concrete one-way slab needs to be studied. The paper presents the experimental research conducted on four full-scale (1500×500×50) mm one-way slabs. An innovative Polyacrylonitrile (PAN) textile grid was used as internal reinforcement in combination with short carbon fibers. The first one consists of fine-grained concrete and short carbon fibers. Two textile-reinforced RC slabs have eight layers of fabric (textile-reinforced concrete (TRC) 8 L) with two percentages of short carbon fiber (0.264% and 0.528%), and one reference textile-reinforced concrete slab without short carbon fiber was fabricated to investigate the flexural behavior under a four-point loading system. The findings indicate that TRC + short carbon fiber showed significantly improved flexural capacity, load-deflection, and load-concrete strain behaviors compared with TRC. The new TRC+ 0.264% short carbon fibers (SCF) and TRC+ 0.528%SCF improved the load-bearing capacity by about 24.19% and 31.56%, respectively, as compared with TRC. Also, the intensity of the crack pattern was measured to compare the ductility of TRC+ short carbon fiber to that of traditional TRC.