A Compressive Strength Model for Proportioning Self-Compacting Concrete

Abstract

Self-compacting concrete flows nearly uniformly at the level of gravity and does not divide, where the structure function and the gaps between the reinforcement is deaerated and completely filled. This fresh property of SCC improves overall construction quality and avoids human errors, till now there is no simple method that makes the SCC mixtures feasible to use in small scale construction industry. This study aims to validate a mixture design procedure for Self-compacting concrete proposed by Ghazi & Al Jadiri with the local materials available at Vijayawada city, Andhra Pradesh India. The proposed method is capable of proportioning Self-compacting concrete mixtures with the previous methods which primarily considers fresh properties rather than the strength requirements. This method covers a wide range of strength (15 to75MPa) covering standard and high strength concretes. Three grades of concrete mixtures 30, 40 & 60MPa were design using the proposed method and the mixtures are varied until the fresh as well as hardened properties are satisfactory. Standard concrete mixtures showed good agreement in both fresh, hardened state whereas high strength concrete requires slight changes in the design assumptions.