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Home > Publications > International Concrete Abstracts Portal
The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.
Title: Influence of High Volumes of Ultra-Fine Additions on Self-Compacting Concrete
Author(s): R. Cioffi, F. Colangelo, D. Caputo, and B. Liguori
Publication: Special Publication
Appears on pages(s): 117-136
Keywords: compressive strength; mineral addition; self-compacting concrete; ultra-fine fly ash; workability
Abstract:In this paper, the influence of high volumes of ultra-fine fly ash, raw fly ash, silica fume and natural zeolites on the properties of self-compacting concrete is evaluated. Three different samples of ultra-fine fly ash obtained after high energy milling of raw material were employed. Concretes were prepared employing various kinds of mineral additions as partial replacement (40%) of cement or in addition to it. Fresh concretes prepared were submitted to technological characterization through the determination of normal slump and J-ring slump flow values. The values of the normal slump flow were found to range between 604 and 785 mm, while the differences with the J-ring slump flow were less than 30 mm. Specimens were tested to evaluate the mechanical properties of the hardened concrete after 7- and 28-day curing. Specifically, the modulus of elasticity and compressive strength were determined. Significant strength increases were observed for the concrete containing ultra-fine fly ash. Finally, no segregation phenomena were observed in the case of cylindrical column specimens (30 x 150 cm). All the results obtained show that environmentally sustainable, high workability concrete could be successfully prepared using large volumes of mineral additions.
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