Researchon Flexural Behaviourof Composite Beams

Concrete is the most used man-made material in the world, with approximately three tons used per annum per individual. Concrete is consumed twice as much as all other construction around the world including wood, steel, plastic, and aluminum. However, the material is used so widely that world cement production now contributes 5 percent of annual global CO2 production. Thus, the idea of reducing the amount of concrete in structures becomes attractive. A new concretecomposite beam with high mechanical performances to weight ratio is developed in this study. By constructing a hollow section in the reinforced concrete elements, a smaller quantity of concrete would be utilized. Hollow concrete sections are commonly used but their construction tends to complicate the setting up stage and increase the cost. In this work, investigation carried out on the strength of hollow reinforced concrete beams produced by the insertion of a bamboo tube, plastic and steel tube during construction is investigated. An experimental investigation is carried out on composite beams under bending loads until failure to evaluate the flexural capacity and the corresponding failure mechanisms. By the experimental method the specimens were tested for flexure and their results are compared.