Comparison and Evaluation of Compressive Strength of Steel fibers, Polypropylene Fibers and Coir Fibers Modified Concrete

The use of fiber for the reinforcement of composites has increased during the last several years. The increasing cost of constructions a matter of concern. Hence the concrete technologist is researching on alternative materials in the construction area. This experimental study investigates about comparison and evolution of modified concrete of M 25 grade of concrete was produced by adding steel, polypropylene and coir (Coconut) fibers are used. The compressive strength of concrete was studied. The specimen was reinforced with steel fiber of Aspect ratio 200 with varying percentage of fiber (0-4%) and monofilament polypropylene fibers with Aspect ratio 200 and the length of 10 mm at varying amount of fibers0-4%.Similarly coir fiber of aspect ratio 200 of 0-4% by weight concrete. Compressive strength of concrete is increases with the increase in fiber content but the optimum dosage was found to be 1% to 1.5%as further increases of fiber contents leads to decreases in the concrete strengths for all fibers. The study concluded that the use of 1% of fiber of steel, 1.2% of polypropylene coir of 1.5% improve compressive strength. Further more research is required to strength the bond between cement paste and the fiber, which can enhance the strength of concrete and also results showed that coir Fiber concrete can be used in reinforced concrete construction. Its utilization is eco-friendly.