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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: Mechanism of Seawater Attack on Concrete
Author(s): G. L. Kalousekand E. K. Benton
Publication: Journal Proceedings
Appears on pages(s): 187-192
Keywords: binders (materials) ; brucite; C3AH6;cement pastes; chlorides; chloroaluminate; crystallization;differential thermal analysis; ettringite;expansion; gysum; magnesium sulfates; nucleation.
Abstract:Type I (white), II, and V (zero c3A) cement pastes of water-cement ratios of 0.3 and 0.5 were immersed in seawater and solutions of sodium and magnesium sulfates. The attack on the cement pastes was interpreted in terms of kinds, amounts, and location of the reaction products in the pastes. X-ray diffraction and differential thermal analysis were used in studying the specimens. Ettringite in Type I cement pastes precipitated as crystals. Growth of these in confined sites caused expansion. The ettringite in Type V cement pastes precipitated and persisted as a gel. Since there was no crystal growth, expansion did not occur. The role of chloroaluminate, btucite, and gypsum is discussed.
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