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Founded in 1904 and headquartered in Farmington Hills, Michigan, USA, the American Concrete Institute is a leading authority and resource worldwide for the development, dissemination, and adoption of its consensus-based standards, technical resources, educational programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.
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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: Silica Fume Distribution and Reactivity in Reactive Powder Concretes
Author(s): L. Gatty, S. Bonnamy, A. Feylessoufi, H. Van Damme
and P. Richard
Publication: Special Publication
Appears on pages(s): 931-954
Keywords: chemical analysis; concrete; curing; microscopy; silica fume.
Abstract:Transmission Electron Microscopy (TEM), Scanning Transmission Electron Microscopy (STEM) and Chemical Analysis investigations lead to a fine characterization of Reactive Powder Concretes elaborated under different conditions as pressure application during setting and post-set heat treatment. An abrasive thinning method followed by ionic etching allowed for the preparation of 100 nm thick specimens with wide observation surface areas while still avoiding any water or CO2 contact which may cause their alteration. Silica fume distribution and reactivity versus curing processes are studied. The Si diffusion interfacial zone between hydrated products and silica time, clinker particles or crushed quartz is measured in different curing cases. The Ca/Si ratio spatial distribution in hydrated products and its evolution with the curing processes are then analysed and shown to be strongly microheterogeneous.
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