Structural Behaviour of Hybrid Fiber Reinforce Concrete by Using Steel and Polypropylene Fiber

Hybrid fiber reinforced concrete can be defined as concrete that reinforced by two or more types of fibers. This study aims to study the mechanical properties of hybrid fiber reinforced concrete where the fibers used were consists of steel fiber and polypropylene fiber. For this purpose five mixes, one normal control mix and four hybrid fiber reinforced concrete mixes were prepared. The volume of steel and polypropylene fiber is kept content from 0.0 to 1%. Slump Test was carried out for each mix in the fresh state in order to determine the workability of the hybrid fiber reinforced concrete. Meanwhile, compressive test, flexural test and split tensile test were carried out to study the mechanical properties of the hybrid fiber reinforced concrete. From the slump test all specimens show low workability. For the result of Compressive split tensile and Flexural Test, the normal control mix shows normal strength development but all the hybrid fiber reinforced concrete mixes gain their strength higher the normal control mix. The expected outcome which is the strength of hybrid fiber reinforced concrete is higher than the strength of normal concrete did achieved. So, further research need to be carried out with some adjustments of methods or materials.