Confinement of reinforced concrete column with upvc

Existing construction technology has not delivered the reliability needed. The rapid deterioration of infrastructure, especially those constructed in severe environments such as bridge piles, has increased the demand for advanced measures in building and bridge substructures. It is necessary to strengthen the concrete columns to increase their load carrying capacity. The cost of formwork was about 40% of the cost of concrete works, the rest being accounted for by labour and the cost of materials. Eliminating or reducing this formwork in construction can significantly reduce the cost of construction. The use of plastic tubes will act as a confinement material as well as a permanent formwork and this will eliminate the need for temporary formwork. Steel and FRP tubes have been widely researched on and used to confine concrete in CFT columns systems. However steel is prone to corrosion, weathering, and chemical attacks especially when used in severe environments such as under-sea piling. According to the specification the casting of short column was carried out. Then the specimen is cured for28 days and on 28th the axial compression testing of short column on load testing machine which has capacity of 15000 kN.