Revista de Engenharia Civil e Ambiental

Evaluating the Effect of Fly Ash on the Rheological and Mechanical Performance Self-Compacted Concrete

Abstract

Jawad Ahmad, M. Talha Ihsan, Aneel Manan, Osama Zaid, Rahat Ullah and Ghlum Abbas

Self-Consolidating Concrete (SCC) is a special concrete which is highly flowable, non-segregating and by its own weight spread into place, completely fill the formwork even in the presence of dense reinforcement without any compaction. This research was implemented to develop and to determine the effect of FA on fresh and hardened properties of self-consolidating concrete. Laboratory test was carried out to investigate the properties of SCC. Five composition of design mix at 0%, 15%, 30%, 45% and 60% fly ash were prepared and tested. The performance of the fresh SCC mixes was determined by testing the filling ability and passing ability through slump flow and slump T50 test, L-box and v funnel test. Standard concrete cylinders were casted comprising of five mixes, cured and tested for analyzing the compressive and split tensile strength behavior of SCC. The results indicate that as the amount of FA increase, the flow and passing ability is decreased continuously. However up to 45% of FA by weight of cement will fall within the limits define by technical specification for SCC and have good passing and flowability. Early age strength (7 days) decreased as the percentage of FA increased while long term the strength (28 and 56) is increased first up to 45% substitution of FA and then decreased gradually.