Strength Parameters of Hybrid Fiber Reinforced Concrete (HFRC)

Concrete is very strong and versatile mouldable construction material. It consists of cement, sand, aggregate mixed with water and with or without adding admixtures. As usual there are some disadvantages in concrete. They are of brittle in nature and less ductile in nature and is weak in tensile strength. Due to its initial cracks the durability of concrete is questioned. To solve this disadvantage the short discrete fibers that are uniformly distributed are added to concrete which will reduces the initial cracks and also to increase the strength of concrete another type of fibers added to concrete. so, adding of two fibers to concrete is known as Hybrid Fiber Reinforced Concrete (HFRC). In the present work the two fibers which are used are steel fibers and polypropylene fibers. Here one fiber will reduce the initial cracks and another fiber will increase the strength and durability of concrete. The fibers that are added to concrete are in equal portions with hybrid ratio of 0 %, 0.5 %, 1 %, 1.5 %. A grade of concrete M30 is prepared as per the IS 102622009 reference code and then cube, cylinders are prepared and tested for Tensile strength, Flexural strength. The Hybrid ratio of 1.5 % gives better results when compared to conventional concrete.