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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: SEM Analysis of the Paste-Aggregate Interface in Concrete Containing Silica Fume
Author(s): J.B.L. Liborio, I.J. da Silva, and A.B. de Melo
Publication: Special Publication
Appears on pages(s): 245-262
Keywords: C-S-H; calcium hydroxide (CH); microstructure; paste-aggregate interface; scanning electron microscopy; silica fume
Abstract:In this study, an analysis of the region of the paste-aggregate interface is carried out by means of scanning electron microscopy. A microanalysis of the Ca/Si ratio in and outside this region is also performed. The images suggest that the presence of silic;r fume produces a more homogeneous interface and outlines the synergetic effect of silica fume and slag, decreasing the CH quantity in concrete or changing the crystals morphology. This influences the development of concrete strength, since the absence of the transition zone compressing the CH crystals facilitates the formation of a better connection of the paste-aggregate system.
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