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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: Principle of Latex Modification and Some Typical Properties of Latex-Modified Mortars and Concretes Adhesion; Binders (materials); Bond (paste to aggregate); Carbonation; Chlorides; curing; diffusion;
Author(s): Yoshihiko Ohama
Publication: Materials Journal
Appears on pages(s): 511-518
Keywords: adhesion; binders (materials); bond (paste to aggregate); carbonation; chlorides; curing; diffusion; durability; mortars (material); freeze-thaw-durability; latex; permeability; plastics, polymers and resins; monomers; polymer-portland cement-concrete
Abstract:Latex-modified mortars and concretes employing various polymer latexes have been developed actively for more than 60 years and widely used as construction materials because of their good performance-cost ratio. This paper reviews the principle of latex modification in the process technology of latex-modified mortars and concretes and discusses their typical properties. Such properties are mainly characterized by a polymer-cement comatrix they form. The formation process of the comatrix is explained by a three-step, simplified model. The possibility of some reactions between polymers, cement, and aggregates is also discussed. The author proposes a binder-void ratio law that expands Talbot's void theory. The reviewed typical properties of hardened latex-modified mortars and concretes include strength, adhesion, pore structure, impermeability, and durability (freeze-thaw resistance, chloride penetration resistance, carbonation resistance, and weatherability). In general, these properties are strongly affected by the polymer-cement ratio.
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