PERFORMANCE EVALUATION OF HPC USING MINERAL ADMIXTURES

Civil engineering

Replacement of cemtatious material with another material in concrete mixture can lead us to more economical structures. Also it will make use of unwanted waste such as fly ash in better use helping environment. In this study, the effect of mineral admixtures like limestone powder (LP), Silica Fume (SF), fly ash (FA) and Alccofine on fresh and hardened properties of HPC has been compared. This research is based on the measurement of early age characteristics of the High Performance Concrete (HPC), the study of the influence of water binder ratio and binder composition on setting, and the influence of strength, slump, and air content in the material. After a thorough study it was found out that Micro silica is a more effective mineral admixture when compared to other mineral admixtures, to obtain High Performance concrete with respect to Fresh and hardened properties of concrete . But in current industry scenario, rate of micro silica is higher as compared to other mineral admixtures. Hence considering results of all the trials it is suggested that using fly ash by replacing cement by 15% is better than replacing micro silica by 5% to obtain the desired strength but the durability is somewhat reduced is case of fly ash as compared to micro silica.

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