THE LABORATORY TESTING OF “FIBER REINFORCED CONCRETE”

Abstract

The use of fiber reinforced concrete (FRC) is becoming a widely accepted solution for reducing the reinforcement for normal concrete structures. This paper presents an experimental procedure for determination of the Elasticity Modulus for fiber reinforced concrete. The experiment determines also the compressive strength for this type of concrete, which determine that a concrete mixture as delivered meets the requirements of the specified strength f’c, in the job specification. The modulus of elasticity of concrete is a function of the modulus of elasticity of the aggregates and the cement matrix and their relative proportions. The modulus of elasticity of concrete is relatively constant at low stress levels but starts decreasing at higher stress levels as matrix cracking develops. For the Fiber Reinforced Concrete the Elasticity Modulus depends also of the modulus of elasticity of the Fiber and in conclusion it should have a bigger value for this type of concrete.