Conventional concrete is the most widely used construction material throughout the world because of its versality, mouldability, durability, and resistance to fire and energy efficiency. However, its major disadvantages like poor tensile strength, limited ductility and little resistance to cracking resists its use as a structural material. Hence, in order to overcome these difficulties several new materials have been developed in the recent past. Admixtures are ingredients other than water, aggregates, hydraulic cement and fibers that are added to the concrete batch immediately before or during mixing. Mineral admixtures are usually added to concrete in larger amounts to enhance the workability of fresh concrete; to improve resistance of concrete to thermal cracking, alkali-aggregate expansion and sulphate attack and to enable a reduction in cement content. The objective of this study is to evaluate the effectiveness of various percentages of mineral admixtures in producing SCC. In this study, the effect of replacing the cement, coarse aggregate and fine aggregate by limestone powder (LP) with silica fume, quarry dust and clinkers respectively and their combinations of various proportions on the properties ofSCChas been compared. The use of SF in Concrete signi?cantly increased the dosage of superplasticiser (SP). At the same constant SP dosage (0 8%) and mineral additives content (30%), LP can better improve the workability than that of control and fine aggregate mixtures by (5% to 45 %). However, the results of this study suggest that certain QD, SF and LP combinations can improve the workability of SCCs, more than QD, SF and LPalone.

Keywords: Self-compacting Concrete; limestone powder; Silica Fume; Quarry Dust; Clinkers