Bonding Performance CFRP Plate and Concrete with Soft Layer System
Rifadli Bahsuan(a*), Shinichi Hino(b), and Atsuya Komori(c)

(a) State University of Gorontalo, Gorontalo, Indonesia *rifadli[at]ung.ac.id
(b) Oita National College of Technology, Oita, Japan
(c) Nippon Steel and Sumikin Materials Co., Ltd, Japan

Abstract

The use of CFRP (Carbon Fiber Reinforced Polymer) plate to strengthen RC (Reinforced Concrete) structure has become popular, nowadays. Bonding behavior between CFRP plate and concrete is an important issue in application of this method. Many research works had been done to improve the bonding performance of this method. In prior study, it was reported that the bond strength could be increased by increasing the stiffness of CFRP or using a soft adhesive layer with a small shear stiffness. With this assumption, the bond strength will be enhanced by putting a soft layer (polyurea) between CFRP plate and usual adhesive (epoxy). To obtain the complete view of bonding behavior of CFRP plate-concrete, a double face tensile test setup was conducted in this research. Both high modulus type and high tension type of CFRP plate with soft layer and without soft layer have been tested. CFRP plate used in this study had a thick of 1mm, 2mm and 4mm, respectively, and had a width of 50mm for all specimens. A Comparison between FEM analysis and experimental test results will be presented to support the accuracy and capability of this strengthening method.

Keywords: Bonding properties, CFRP plate, Polyurea, Soft layer.

Topic: Civil Engineering