Flexural Strength of Self-Compacting Concrete Beams

Abstract

Concrete precast technology has been developing and already used for many building structures. The components that have thin dimensions sometimes have problems in casting like its flowing and compaction. Self-Compacting Concrete (SCC) does not need to vibrate to achieve full compaction and it can flow to reach the narrow side of concrete formwork. This study used a mix design to perform SCC beams with added material in the form of superplasticizer viscocrete with levels of 1.2%, 1.3%, 1.4%, 1.5% and 1.6% of the cement weight. For each variation of the composition, 3 specimens were made, each variation of the specimen was made for 14 days, 21 days, and 28 days tests. From the test results, fresh concrete has met the requirements for SCC concrete, but for the strength test and superplasticizer variations 1.2%, 1.3%, 1.4%, 1.5% and 1.6% have not met the requirements set by SCC. In this study, the highest average compressive strength value obtained at 1.6% superplasticizer percentage, which was 28.31 MPa with the highest average flexural strength value at 1.6% superplasticizer percentage, which was 2.97 MPa.