Self- Compacting concrete is a type of concrete that gets compacted under it's self-weight. It's commonly abbreviated as SCC and defined as the concrete which can placed and compacted into every corner of a form work, purely means of it's self-weight by eliminating the need of either external energy input from vibrators or any type of compacting effort. Self compact ability and stability are susceptible to ternary effects of chemical and mineral admixture type and their content. In this study, the effect of limestone powder (LP) on the properties of SCC has been compared with other mineral additives (silica fume (SF) quarry dust, clinkers and their combinations) effects. Fresh properties, flexural and compressive strengths and water absorption properties of Concrete were determined. The use of SF in Concrete significantly increased the dosage of super plasticiser (SP). At the same constant SP dosage (0 -8%) and mineral additives content (30%), LP can better improve the work ability than that of control and FA mixtures by (5 % to 45 %). However, the results of this study suggest that certain FA, SF and LP combinations can improve the work ability of SCCs, more than FA, SF and LP alone. LP can have a positive influence on the mechanical performance at early strength development while SF improved aggregate-matrix bond resulting from the formation of a less porous transition zone in Concrete. SF can better reducing effect on total water absorption while FAand LP will not have the same effect, at 28 days.

Keywords:Self-compacting Concrete, limestone powder, Silica Fume, Quarry Dust, Clinkers work ability, strength, water absorption.