Concrete Matrix Properties Influence on Fibre Reinforced Concrete Mechanical Behaviour

At present, Steel Fiber Reinforced Concrete (SFRC) has been widely applied in civil engineering as construction material. The task of SFRC successful application in construction design needs the material behavior durable prediction depending on fibre type, its content and concrete mix composition. Within the framework of these research tree types of concrete mix with constant fiber content 140 kg/m3 were investigated: conventional strength concrete, high strength concrete and ultra high strength concrete. Using special method of mix design quite workable and flowable mixes was obtained. Produced samples were tested under 4-point bending test, as a result deflection – applied force diagrams were obtained. Elasticity modulus and concrete compressive strength also were determined. Obtained results analysis was done. Performed investigations allow to conclude how to reach higher SFRC mechanical characteristics on the basement of more optimal concrete matrix mix composition