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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: Percolation Aspects of Cement Paste and Concrete—Properties and Durability
Author(s): E. J. Garboczi and D. P. Bentz
Publication: Special Publication
Appears on pages(s): 147-164
Keywords: cement; chlorides; diffusivity; durability; materials science; microcomputers; microstructure; percolation; permeability; simulation; transport
Abstract:Portland cement concrete is a composite material, where the matrix consist of porland cement paste. Cement paste forms from the hydration reaction of portland cement with water. The microstructure of cement paste changes drastically over time period of about one week, with slower changes occurring over subsequent weeks to months. The effect of this hydration process on the changing microstructure can be represented using computer simulation techniques applied to three dimensional digital image-based models. Percolation theory can be used to understand the developing microstructure of cement paste in terms of three percolation thresholds: the set point, capillary porosity percolation, and the percolation of the C-S-H phase. The percolation of the interfacial transition zones also plays an important role in concrete microstructure, and can be displayed using computer simulation models. These percolation aspects help determine the transport properties and therefore the durability and service life of concrete.
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