The Effect of Fly Ash on the Flexible Strength Concrete and Concrete Temperature

Abstract

Concrete is a construction material that is widely used in modern building structures. Concrete is obtained by mixing Portland cement, water, sand, gravel, and under certain conditions other admixtures can be used, one of which is using Fly Ash. The use of fly ash as a concrete forming material has a positive impact from an environmental perspective. Fly Ash is a very fine residue of burning coal. The fineness of the fly ash granules has the potential to cause air pollution. Handling of fly ash is currently still limited to stockpiling on vacant land. In this study, we will identify the benefits of fly ash as a substitute for cement in concrete. Identification of fly ash material focuses on the effect of using this material on the flexural strength of concrete and concrete temperature.

The purpose of this study was to determine the effect of using fly ash in what percentage with the best test results for flexural strength and workability of concrete. The percentage of fly ash used varies, starting from 10%, 15% and 20%. The concrete will be tested at 7, 14 and 28 days after curing. This study used 18 beam-shaped specimens where for each variation the addition of fly ash was made of 6 specimens.