AN EXPERIMENTAL ANALYSIS OF STRENGTH PROPERTIES OF HIGH STRENGTH CONCRETE USING STEEL FIBERS

Concrete is extensively used as a construction material in various types of structures, because of its versatility and durability. Concrete being brittle, is weak in tension and is often subjected to shrinkage and creep. These factors have led to the development of FIBRE REINFORCED CONCRETE. In recent years High strength concrete is gaining importance in the fields of pre-stressed concrete bridges, high rise buildings, machine foundations etc. In this context, an attempt has been made to study the combined effect of high strength concrete and FRC. In the present investigation concrete grades having target strength of 40N/mm², 50N/mm², 60 N/mm² is studied. Steel fibres of circular cross section are used in different volume fractions. The characteristics like compressive strength, split tensile strength, modulus of elasticity, load-deflection and flexural strength are investigated. The test results are analyzed critically and methods for predicting the characteristics of high strength FRC are discussed.