EXPERIMENTAL INVESTIGATION ON EFFECT OF SBR AND STEEL FIBER ON PROPERTIES OF DIFFERENT CONCRETE TYPES

Concrete represent the various well-known and extensively worked material to possess very high strength and adequate workability characteristics. This paper emphasizes on polymer steel fiber concrete. Five different concrete mixes were taken experimentally to study the effect of Styrene-Butadiene Rubber (SBR) latex with different dosages ratio of (0, 5, 10, 15 and 20%) and steel fiber with different ratios of (0, 1 and 2% by volume) on properties of different concrete mix with grade of concrete (30, 35, 47, 60 and 85). SBR latex polymer was adopted depending on weight of cement. Cubes and cylinders for the compressive strength test were prepared, and specimens were tested after 28 days of curing. This paper remarked that SBR latex has the contrary influence at the early age while at 28 days, the joining of SBR latex in concrete results in intensification of compressive strength. The results show that using SBR in dosages of (0, 5, 10, 15 and 20%) affects increasingly on compressive strength up to (15%) after that at 20% SBR effect decreasingly and the results is similar to ratio of 10%, that mean increase of SBR beyond 15% effect reversely on concrete because of its superplasticizer effects. The attachment of steel fibers to concrete will develop the compressive strength. The results show that for the five different concrete mixes, SBR effect decrease with the increase of concrete grade