The addition of any type of fibers to plain concrete reduces PPT. Presentation Summary: The addition of any type of fibers to plain concrete reduces the workability. Concrete mixtures containing fibers posses very low consistencies.
FIBRE REINFORCED CONCRETE BUILDING TECHNOLOGY AND MANAGEMENT NEED PCC has low tensile strength, limited ductility and little resistance to cracking PCC develops micro-cracks, even before loading Addition of small, closely spaced and uniformly distributed fibres act as crack arresters. FIBRE REINFORCED CONCRETE is a composite material consisting of mixtures of cement, mortar or concrete and discontinuous, discrete, uniformly dispersed suitable fibres. FIBRE REINFORCED CONCRETE Factors Affecting The Properties Of Frc Relative Fibre Matrix Stiffness Volume of Fibres Aspect Ratio of the Fibre Orientation of Fibres Workability and Compaction of Concrete Size of Coarse Aggregate Mixing FIBRE REINFORCED CONCRETE 1. Relative Fibre Matrix Stiffness Modulus of elasticity of matrix must be much lower than that of fibre. Steel, glass, carbon Fibres with low modulus of elasticity- nylon, polypropylene Interfacial bond between the matrix and the fibres determine the effectiveness of stress transfer FIBRE REINFORCED CONCRETE 2. Volume Of Fibres FIBRE REINFORCED CONCRETE 3. Aspect Ratio of the Fibre Aspect Ratio of a fibre = Length/Diameter FIBRE REINFORCED CONCRETE 4.
Orientation of Fibres The effect of randomness, was tested using mortar specimens reinforced with 0.5% volume of fibres, by orienting them: parallel to the direction of the load perpendicular to the direction of the load in random FIBRE REINFORCED CONCRETE 5. Workability and Compaction of Concrete Fibres reduce workability 6. Size of Aggregate Size of CA is restricted to 10mm FIBRE REINFORCED CONCRETE 7.