Comparison of Addition of Sika-Viscocrete 1050 He and Sika-Visco Flow for High Strength Concrete SCC Fc'45 Mpa (Case Study: Replacement of Sei. Alalak Bridge)

Abstract

In this Sei Alalak Bridge replacement project, several types of concrete were used, one of which was high-strength fc' 45 MPa SCC (Self Compacting Concrete). In this project itself, various trials of SCC concrete mixtures have been carried out, one of which is the addition of an addictive substance in the form of Sika-Visconcrete 1050 HE. The addictive substance Sika-Visconcrete 1050 He has a relatively expensive price for use in SCC mixtures, for this reason this research was carried out using a different type of additive, namely Sika-Visco Flow whose function is not too much different, namely to affect the flexibility or dilution of the concrete paste at a price. which is relatively cheaper. The purpose of this study was to determine the ratio of the mixture and SCC concrete when using Sika-Visconcrete 1050 He and Sika-Visco Flow and to determine the compressive strength of SCC concrete when using Sika-Visconcrete 1050 He and Sika-Visco Flow. The research method used is an experimental study by comparing Sika-Viscote 1050 He 1.55% concrete with SCC concrete using a mixture of Sika-Visco Flow 1.55% and then reducing the percentage of the Sika-Visco Flow mixture to 1.00%. The results of the research on the 1.55% VF sample obtained that the compressive strength at the age of 3 days was 38.39 MPa and at the age of 7 days 63.34 MPa, and the compressive strength of the VF 1.00% sample was 37.31 MPa at the age of 3 days. . at the age of 7 days 61.56 MPa. So with the use of Sika-Visco Flow with a percentage of 1% efficient in terms of strength and make concrete more efficient in terms of price.