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Compressive strength and stability of sustainable self-consolidating concrete containing fly ash, silica fume, and GGBS

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Abstract

This paper presents the findings of an experimental program seeking to understand the effect of mineral admixtures on fresh and hardened properties of sustainable self-consolidating concrete (SCC) mixes where up to 80% of Portland cement was replaced with fly ash, silica fume, or ground granulated blast furnace slag. Compressive strength of SCC mixes was measured after 3, 7, and 28 days of moist curing. It was concluded in this study that increasing the dosage of fly ash increases concrete flow but also decreases segregation resistance. In addition, for the water-to-cement ratio of 0.36 used in this study, it was observed that the compressive strength decreases compared to control mix after 28 days of curing when cement was partially replaced by 10%, 30%, and 40%of fly ash. However, a fly ash replacement ratio of 20% increased the compressive strength by a small margin compared to the control mix. Replacing cement with silica fume at 5%, 10%, 15%, and 20% was found to increase compressive strength of SCC mixes compared to the control mix. However, the highest 28 day compressive strength of 95.3 MPa occurred with SCC mixes in which 15% of the cement was replaced with silica fume.

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Acknowledgements

The authors wish to acknowledge the financial support of the Office of Research and Sponsored Programs at Abu Dhabi University through grant # 1920200.

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Authors and Affiliations

  1. Department of Civil Engineering, Abu Dhabi University, Abu Dhabi, United Arab Emirates

    Osama Ahmed Mohamed & Omar Fawwaz Najm

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  1. Osama Ahmed Mohamed
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  2. Omar Fawwaz Najm
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Correspondence to Osama Ahmed Mohamed.

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Mohamed, O.A., Najm, O.F. Compressive strength and stability of sustainable self-consolidating concrete containing fly ash, silica fume, and GGBS. Front. Struct. Civ. Eng. 11, 406–411 (2017). https://doi.org/10.1007/s11709-016-0350-1

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  • DOI: https://doi.org/10.1007/s11709-016-0350-1

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