Enhancing bamboo reinforcement using a hose-clamp to increase bond-stress and slip resistance

Bamboo can be used as reinforcement for concrete, especially in simple construction, because of its high tensile strength. Any collapse that occurs in a bamboo reinforced concrete beam is often caused by failure of the bond between bamboo and concrete. Many researchers have suggested using adhesive coatings or roughness modifications to bamboo reinforcement, but a slip failure pattern still appears. The aim of this research is to increase bond-stress and slip resistance by using a hose-clamp, and to obtain a relationship model of load vs. deflection and bond-stress vs. slip between bamboo reinforcement and concrete. The experiments use 75 mm × 150 mm x 1100 mm concrete beams. Concrete beam specimens comprise 24 bamboo-reinforced beams, one beam with 8 mm diameter steel reinforcement, and one without reinforcement. Hose-clamp spacing varies by 0 cm, 15 cm, 20 cm, and 25 cm. Beam testing uses a four-point loading method. Test results show an increase in bond-stress and flexural capacity, and reduced slip between bamboo reinforcement and concrete, when hose-clamps are used. There are differences in the relationship of load vs. deflection and bond-stress vs. slip between bamboo reinforced concrete beams and steel reinforced concrete beams.