Pemanfaatan limbah abu terbang (fly ash) diharapkan dapat mengatasi masalah lingkungan, karena limbah jenis tersebut termasuk dalam golongan limbah b3 yang apabila mencemari lingkungan akan berdampak buruk pada lingkungan itu sendiri dan kesehatan manusia yang ada disekitarnya. Oleh karena itu penelitian ini bertujuan untuk memanfaatkan abu terbang (fly ash) sebagai bahan pengganti semen yang divariasikan dengan penambahan silica fume dan superplasticizer terhadap beton, dan juga untuk membandingkan antara beton normal dengan beton variasi dengan metode beton memadat sendiri (Self Compacting Concrete). Prosentase penggunaan fly ash dengan silica fume dan superplasticizer dibedakan menjadi beberapa variasi, yaitu : variasi A5% (Fly ash 5%, Silica Fume 2% dan Superplasticizer 2%), variasi A10% (Fly ash 10%, Silica Fume 4% dan Superplasticizer 2%), variasi A15% (Fly ash 15%, Silica Fume 6% dan Superplasticizer 2%), variasi A20% (Fly ash 20%, Silica Fume 8% dan Superplasticizer 2%), dan variasi A25% (Fly ash 25%, Silica Fume 10% dan Superplasticizer 2%). Dalam pengerjaanya dilakukan dengan slump test dan slump flow, dan pengujian setting time beton untuk menunjukan waktu ikatan awal pada beton. Hasil kuat tekan tertinggi terjadi pada beton dengan variasi fly ash 10%, silica fume 4%, dan superplasticizer 2%, yaitu nilai kuat tekannya sebesar 47,279 MPa dibandingkan dengan beton normal 33,063 MPa, serta dapat mempengaruhi nilai slump dan setting time beton.

The utilization of fly ash waste is expected to overcome the environmental problems, because the waste is included in the b3 waste category which is when polluting the environment will have a negative impact on the environment itself and human being. Therefore this study aims to utilize the fly ash as a cement replacement material that varies with the addition of silica fume and superplasticizer to the concrete, and also to compare between the normal concrete with the variation concrete with self-compaction concrete method. Percentage of fly ash usage with silica fume and superplasticizer is divided into several variations, namely : variation A5% ( Fly ash 5%, Silica Fume 2% and Superplasticizer 2%), variation A10% (Fly ash 10%, Silica Fume 4% and Superplasticizer 2%), variation A15% (Fly ash 15%, Silica Fume 6% and Superplasticizer 2%), variation A20% (Fly ash 20%, Silica Fume 8% and Superplasticizer 2%, and variation A25% (Fly ash 25%, Silica Fume 10% and Superplasticizer 2%). In the process, it is done with slump test and slump flow, and testing of concrete time setting to show the initial bonding time on the concrete. The highest yield of compressive strength occurred in concrete with fly ash 10% variation, 4% silica fume, and 2% superplasticizer, the compressive strength equal to 47,279 MPa compared to normal concrete 33,063 MPa, and can influence slump value and concrete time setting.