Investigation on binder and concrete with fine grinded fly ash and silica fume as pozzolanic combined replacement

Abstract

This paper presents the persuade of Fine Grinded Fly Ash (FGFA) and Silica Fume (SF) as a modified pozzolanic replacement to the binder. The OPC cement was combined replaced with FGFA in 0%, 5%, 10%, 15%, 20%, 25%, 30%, 35% and 40% and Silica Fume in 5% to weight of cement. The consistency of water is tested based on the values Cement, FGFA and SF combined pastes are manufactured and tested for its initial setting time and final setting time of modified binder. And also the slump cone and flow Table test for fresh concrete and hardened high-performance Concrete compressive, split tensile and flexural strengths have been conducted. The results show that the properties of modified binder and both fresh and hardened high-performance concrete highly influenced by the percentage of FGFA and SF replacement. This study shows that the influence of the combination of FGFA and SF and the higher strength gains was observed at the initial and later ages of both modified mortar and high-performance Concrete and compared with Control Specimen (CS).