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The need of high strength concrete (H. S. C.) is in creasing in the recent years. This material becomes necessary, but it is brittle .So, metallic fibers are used to enhance composite properties of (H. S. C.).The enhanced properties include tensile strength, compr essive strength, elastic modulus, crack resistance, crack control, d urability, fatigue life, resistance to impact and abrasion, shrinkage, expan sion, thermal characteristics, and fire resistance of concrete .T here is little information in the available literature about the bond characte ristics for the different forms of rib geometry of the deformed bars on the strength between steel and high-strength fiber-reinforced concrete for dif ferent relative rib areas and fibers types . The main objective of this research is to study the effect of using Metallic and Non Metallic- Fiber and rib geometry of steel b ars on bond strength for high strength concrete (H. S. C.). Also Pattern of cracks, final mode of failure and deformational characteristics (direc t slip for pull-out) were investigated.

EFFECT OF USING METALLIC AND NON METALLIC - FIBER AND RIB GEOMETRY OF STEEL BARS ON BOND STRENGTH FOR HIGH STRENGTH CONCRETE (H. S. C.)