Strength properties of coconut fibre reinforced concrete

Abstract

The fiber obtained from the dry outer covering of the coconut fiber is termed as “coir”. This fiber has the best toughness among all natural fibres. These coir fibres have the tendency to be used as reinforcement in low cost concrete structures particularly in earthquake regions because of their property of toughness and sturdiness. Some advantages of coir fibers include insect proof, resistant to fungi and decay, provide good insulation against temperature and sound. They remain unaffected by external factors like humidity. They act as reinforcement substance by giving strength to the composite. To the brittle material concrete, a standard stresses or impact load is applied; the durability is 1/10th of its compressive strength. Thus, reinforcing bars are used with concrete in order that they face upto tensile stresses and replace the shortage of malleability and strength. For the preparation of fiber concrete solid cube M20 grade cement is employed. The fiber is mixed with cement, fine aggregate (Msand), coarse aggregate (gravel) and needed quantity no f water that forms the concrete mix. A layer of oil is applied evenly within the cube mould to prevent the concrete from sticking to the mould. This concrete mix is then crammed fully within the solid cube mould. This is then left to dry for 24hrs. This is taken out from the mould and immersed curing is to be done for 3-7 days. The comparison of fiber concrete cubes with the conventional concrete cubes was the main aim of this study. Various tests were conducted to determine its compressive strength, density and crushing load.