Strength of Normal Concrete Using Metallic and Synthetic Fibers

摘要

Based on the laboratory experiment, cube and cylindrical specimens have been designed with metallic and non-metallic groups of fibers. In metallic fibers, steel fibers of hook end with 50, 60 aspect ratio and crimped round (copper coated) of 52.85 aspect ratio containing 0% and 0.5% volume fraction were used without adding admixtures. In synthetic fibers category, fibrillated polypropylene fibers of 15 mm, 20 mm and 24 mm cut length at 0.4% by weight of cement were used without adding admixtures. Total 63 specimens were casted and tested for the work. Comparing the results of fiber reinforced concrete with plain concrete, this paper validated the positive effect of steel fibers with different aspect ratios and fibrillated polypropylene fibers with different cut length in compression and splitting strength improvement of specimen at 7 and 28 days, analyzed the sensitivity of different fibers to concrete with different strength.