The Feasibility and Performance of Self Compacting Concrete on Various Size and Proportion of Locally Coarse Aggregate

Abstract

Self-compacting concrete (SCC) is an innovation concrete technology which can spread grout of concrete into the formwork without the need of vibrator. The objective of this research was to evaluate the performance of SCC using locally available coarse aggregate sizes, proportion from total aggregate weight and chemical admixtures in producing of SCC. Two various sizes and percentages of coarse aggregates from total aggregate weight were investigated The influence of coarse aggregate size and proportion is determined in terms of fresh concrete and compressive strength under constant dosage of superplasticizer. Result of the research indicated that increasing the size of coarse aggregate in SCC mixtures from size of 10 mm to 12.5 mm can produce poor fairly mixtures in terms passing ability for both of specimens using 40% and 50% of coarse aggregate content in the SCC mixtures. Moreover, the augment of the volume content of coarse aggregate from 40% to 50% of total aggregate weight can improve the concrete compressive strength and the adding of superplasticizer in the mixtures can avoid segregation among aggregate particles. The result of experimental phase indicated that the equation from ACI 209R-92 can be utilized to predict the compressive strength of SCC mixtures at different ages