UTILIZATION OF SUPER POZZOLANIC MATERIAL IN THE PRODUCTION OF SELF-COMPACTING CONCRETE

摘要

The study presents an experimental investigation on the properties of Self-Compacting Concrete (SCC) containing ultra-fine Ground Granulated Blast furnace Slag (GGBS) as a Super-Pozzolanic Material (SPM) in combination with class-F fly ash. Portland cement was replaced by weight with ultra-fine GGBS in the varying proportion from 0% to 10% at the rate of 2.5% whereas the fly ash was nominally fixed at 20% by weight of the total powder content in all the SCC mixtures. The properties studied include fresh state behaviour, compressive strength, ultrasonic pulse velocity, water absorption, pH of the concrete, chloride and sulfate resistance of the SCC. Results showed that the incorporation of ultra-fine GGBS positively affect the fresh, the hardened and the durability performance of the considered SCC. An increase of about 32% was observed in the compressive strength for the ternary blended SCC mixture with 10% GGBS content; when compared to the binary blended control SCC mixture. Water absorption values of the SCC showed a decreasing trend with increase in the GGBS content. Durability performance of the SCC in terms of chloride and sulfate resistance improved with addition of this ultra-fine GGBS at the later ages.