A Comparative Assessment on Crack Propagation Behaviour of Concrete Using Recron 3S Fibre

P Teja Vigna Sivani, P Nagendra Babu

Abstract: Cracks in concrete are the most undesirable due to Plastic shrinkage and drying shrinkage causes structural failures as well as decay in Load bearing capacity of concrete. So, there is a vital importance in improving the Crack Resistance of structural elements in order to increase the durability and life span. In view of that, Fiber-reinforced concrete (FRC) containing fibrous material has the potential to increase the structural integrity. Recron fiber is made up of Polypropylene as majority portion which has excellent tensile strength among all the synthetic fibers. This study mainly concentrates on the Fresh and Hardened properties of M25 Grade Concrete along with the Assessment of Crack Propagation studies in terms of Crack Mouth Opening Displacement (CMOD. Properties will be analyzed by maintaining the Fiber Aspect Ratio (L/D) ratio as 200 with the Random orientation for different dosages of fiber of lengths 12.5 mm and 25 mm. Polypropylene fibers will be added in concrete with different dosages viz., 0.5, 0.75 and 1.0% to the total volume of concrete. Beams will be casted for flexural strength test. Seven beams will be tested; one normal beam without polypropylene fiber and six beams with polypropylene fiber will be casted and a flexural strength test will be conducted. Compressive Strength, Flexural strength and Crack Propagation behavior in terms of width measurement are monitored during the test.

Keywords: Poly Propylene Fiber, Crack Propagation, Recron 3S Fiber, Concrete with Fibers