In today’s market, it is imperative to be knowledgeable and have an edge over the competition. ACI members have it…they are engaged, informed, and stay up to date by taking advantage of benefits that ACI membership provides them.
Read more about membership
Become an ACI Member
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.
American Concrete Institute
38800 Country Club Dr.
Farmington Hills, MI
Feedback via Email
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: Freezing and Thawing Resistance of Concrete With Excessive Bleeding and Its Improvement
Author(s): M. Shoya, S. Nagataki, F. Tomosawa, S. Sugita
and Y. Tsukinaga
Publication: Special Publication
Appears on pages(s): 879-898
Keywords: Admixtures; air-entrainment; bleeding (concrete); copper; fine aggregates; .
freeze thaw durability; water-cement ratio.
Abstract:In recent years, especially in Japan, the research on the utilization of industrial by-products and the recycled aggregates has proceeded, with emphasis of recycling and use of resources. Among the industrial by-products applicable to concrete aggregates, non-ferrous metal slags for fine aggregates such as ferronickel slag and copper slag, are examined in this study. These slags are suitable for aggregates because they are almost inert both chemically and physically in concrete. Also, concretes with these slags generally show the same strength level as normal concrete. However, the more the volume fraction of slag fine aggregates, the greater the bleeding, usually because of the heavy specific weight and glass-like surface properties with irregular grain shape. It is possible that the excessive bleeding is likely to affect the concrete quality, such as aggravating frost susceptibility. In this paper, freezing and thawing resistance of concretes, with several kinds of slag fine aggregates, are investigated. The durability factor of concrete according to ASTM C 666A, decreased with increased bleeding amount, and the severe bleeding in excess of 5 I/ m 2 aggressively impaired the frost resistance of air-entrained concrete when the water to cement ratio and the volume fraction of slag in fine aggregates exceeded 60% and 50%, respectively. The decreased freezing and thawing resistance could be attributed to the internal defects originated by the up flow of bleeding water, measurement of the air void system, etc. It is also shown that the addition of a chemical admixture compound with cellulose ether and a powder-like material, such as the lime stone powder, are highly effective to improve not only the bleeding but also the freezing and thawing resistance of concrete.
Click here to become an online Journal subscriber