1. The effect of fly ash and silica fume content on the compressive strength of high strength concrete.
- Author
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Irianti, Laksmi, Sebayang, Surya, and Putra, Rivaldo Hartono
- Subjects
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INCINERATION , *FLY ash , *HIGH strength concrete , *SILICA fume , *CONCRETE mixing , *CONCRETE testing - Abstract
Considering that the waste from burning coal (fly ash) increases every year and can cause quite dangerous environmental impacts, especially on air pollution in surrounding life, Fly ash should be used as a concrete mixture. The purpose of this study was to determine the effect of adding silica fume and replacing some of the cement in the concrete mix with fly ash on the compressive strength of high-strength concrete mixes and to determine the optimal combination of fly ash and silica fume. was to do Strength concrete mix. Decide how to use. In this study, the authors used fly ash as a partial substitute for cement and silica fume as an additional material to increase curing time. During his 28-day and his 60-day concrete test periods, the variations in fly ash used were 0%, 5%, 10%, and 15% of the total weight of cement used, The fluctuation of silica fume is, 5% and 10%. 0.5 wt % Superplasticizer for cement. Based on the analysis of study data, it was found that concrete compressive strength increased between concrete with fly ash and silica fume and concrete without fly ash and silica fume. The maximum compressive strength of concrete occurred with the addition of 15% fly ash and 5% silica fume, with compressive strength values of 41.48 MPa after 28 days and 47.03 MPa after 60 days. This indicates that a fly ash content of 15% and a silica fume content of 5% are the optimal addition levels of fly ash and silica fume for 28- and 60-day-old concrete. [ABSTRACT FROM AUTHOR]
- Published
- 2024
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