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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: Strength and Durability Parameters of an Environmentally Friendly Concrete
Author(s): Ramon Corral, Susana P. Arredondo, Jose M. Gomez, Diana C. Gamez, Jose M. Mendivil, and Jorge L. Almaral
Publication: Special Publication
Appears on pages(s): 1-15
Keywords: recycled aggregate concrete, electrochemical impedance spec¬troscopy, chloride corrosion, pozzolanic materials.
Abstract:Due to the significant environmental impact that the concrete production causes, and as a contribution to sustainability of this industry; presently some of the concrete constituents are replaced with alternative recycled materials. Chloride ingress into concrete is one of the main causes of electrochemical corrosion of reinforcement. Although there is an interest to use Recycled Concrete Aggregate (RCA) in concrete, its use is limited due to its detrimental effect on durability. Therefore in this research RCA and Supplementary Cementing Materials (SCM), such as Fly Ash (FA) and Silica Fume (SF), were used to produce durable and environmentally friendly concretes. They were evaluated based on their compressive strength, porosity, electrical resistivity and chloride-induced reinforcement corrosion when they were exposed to accelerated chloride conditions. The corrosion rates of steel embedded in these concretes were measured by the electrochemical impedance spectroscopy technique. The results indicated that concrete manufactured with 100% RCA are inferior to conventional concretes, but their performance can be improved by replacing Portland cement by 30% FA or 10% SF.
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