FLEXURAL PERFORMANCE OF RC BEAMS REINFORCED
WITH BRAIDED COMPOSITE FRP BARS
33rd Our World in Concrete and Structures (OWICs) - 2008
R Sakurada*, Akita National College of Technology, Japan
T Shimomura, Nagaoka University of Technology, Japan
K Maruyama, Nagaoka University of Technology, Japan
S Matsubara, Fibex Co., Ltd., Japan
Aramid-Glass fiber, composite fiber, flexural behavior, moment capacity, alkaline-resistant
The composite Aramid-Glass bars were manufactured by way of trial in order to improve the cost performance and to strengthen the tensile strength and the elastic modulus of glass fiber. The glass fibers were woven in the inside of bar, and thereafter Aramid fibers were woven in the outside of the glass fibers with sectional area ratio of 1: 2 of Aramid fiber and glass fiber. Both fibers were woven in the shape of braid and then were impregnated in a thermosetting resin. This study examined the bending characteristics of RC beams reinforced with Aramid-Glass bars as longitudinal reinforcing bars. The alkaline-resistant properties of the bars submerged in high alkaline solution were also examined.
The failure moment of RC beam reinforced with Aramid-Glass bars in diameter of 13mm is 95% of RC beam reinforced with an equivalent area of Aramid bars, and the failure moment becomes 7.6% higher by using sand-coated Aramid-Glass bars. Aramid-Glass bars submerged in high alkaline solution of pH13 for 28 days provide 0.03% increase in weight and 15% reduction of tension strength. The failure moment of RC beam reinforced with alkaline-submerged Aramid-Glass bars gives about 2% increase than that of RC beam with Aramid-Glass bars without alkaline deterioration.