Influence of various fibers on rheology behavior of self-compacting concrete

One of the most important issues that is of great importance in self-compacting concrete is the rheological properties of self-compacting concrete, however mechanical properties and durability also riquire significarlt considerations. The objective is to determine the maximum amount of fiber, where the workability of concrete is maintined. In this research 10 mix designs have been studied, in which one mix is considered as control and the rest contain 0.1, 0.15, 0.2 fiber percentages of steel, glass and polypropylene. The results on rheology behavior shows, when the percentage of fibers increase, the concrete efficiency decrease, and the yield stresses dynamic and static, plastic viscosity and Thixotropy increase and as a result it will reduce the rheological properties. In mixes with 0.2% polypropylene and glass fibers the minimum standard values for self-compacting concrete is reached whereas for more of fiber peruntage the self-compacting state is violated.