STRENGTH ANALYSIS OF STEEL FIBER REINFORCED SELF COMPACTING CONCRETE

Abstract

In construction industry the cementations substances are one of the most required and used materials. These cement based materials are easily treated and prepared into required designed shapes and structural configurations at an early stage, i.e. earlier than the curing process. However the major weak spot of these cement based materials is their brittleness, associated with their rigid properties, which is responsible for the formation of cracks and in addition to propagation when subjected to stresses. Such weak spot leads to the deterioration of their mechanical properties, which suggests costly maintenance or even reconstruction of such materials in a relatively short existence time. Hence, new cement based substances with higher durability properties, for instance, that provide higher cracking resistance, are needed in the constructing industry. Since historic time, fiber reinforced concrete has been replaced with plain concrete which is brittle material. Although, the involvement of single type fiber may improve mechanical properties of concrete, the hybridization can compensate the disadvantages of 2 fiber types and represent their advantages. The impact of using glass fiber and polypropylene fiber for reinforcing the concrete to quantify the mechanical properties of concrete matrix explores in thisthesis. In the present study an experimental investigation was conducted on M30 grade concrete by using steel, fibers. The steel fibers are used at the dose of 0%, 0.25%, 0. 5%, 0.75%, 1%, 1.25% and 1.5%. The strength values related to compressive strength, split tensile strength and flexural strength are determined at the age of 7days, 14days and 28 days curing period.