Mechanical Properties of Hybrid Coconut Fiber Reinforced Concrete

Engineering properties such as compressive strength, splitting tensile strength of normal concrete (NC), Glass fiber reinforced concrete (GFRC) and hybrid fiber reinforced concrete have been obtained from standard tests and compared. A total of 36 specimens were tested for determining the mechanical properties. The grade of concrete used was M30. The total volume of fibers was fixed as 0.5% of total volume of concrete. Six concrete mixes were selected for study. Which include control mix without fiber (NC), glass fiber reinforced concrete (GFRC) with 0.5% glass fibers, and four hybrid fiber reinforced (HFRC) concrete of glass and coconut fibers with total volume fraction as 0.5%. In general, the addition of fibers improved the mechanical properties. However the increase was found to be nominal in case of compressive strength (29.74%), significant in the case of splitting tensile strength (70%), at 0.35% glass fibers and 0.15% coconut fibers.