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

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 b...

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Bibliographic Details
Published in:Frontiers of Structural and Civil Engineering 2017-12, Vol.11 (4), p.406-411
Main Authors: MOHAMED, Osama Ahmed, NAJM, Omar Fawwaz
Format: Article
Language:English
Subjects:
Admixtures
and sustainable concrete
Cement
Cities
Civil Engineering
Compressive strength
Concrete
Consolidation
Countries
Curing
Engineering
Fly ash
GGBS
ground granulated blast-furnace slag
Mechanical properties
Portland cement
Portland cements
Regions
Research Article
self-consolidating concrete
Silica
Silica fume
Slag
Water-cement ratio
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Summary: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.
ISSN:2095-2430
2095-2449
DOI:10.1007/s11709-016-0350-1