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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: Use of Dry Bottom Ash as a Fine Aggregate in Roller Compacted Concrete
Author(s): N. Ghafoori, Y. Cai and B. Ahmadi
Publication: Special Publication
Appears on pages(s): 487-506
Keywords: Abrasion; compacting; compression; drying shrinkage; freeze thaw
durability; modulus of elasticity; pavements; tension.
Abstract:Tests were carried out on a series of laboratory-made roller compacted concretes (RCC) containing high-calcium dry bottom ash as a fine aggregate. Concrete specimens of 6 different proportions (cement factors of 188 to 337 kg/m3 and coarse aggregate contents of 1042 to 1349 kg/m3) were prepared at their optimum moisture content and fabricated in accordance with the requirements of ASTM C 1170, Procedure A. The RCC samples were moist-cured under different ages and tested for compression, splitting-tension, flexure, modulus of elasticity, drying shrinkage, and resistance to abrasion and rapid freezing and thawing. From the data produced in this investigation, it is concluded that good strength, stiffness, drying shrinkage, and resistance to wear and repeated freezing and thawing cycles can be obtained with compacted concretes containing bottom ash of dry coal combustion process. Assuming that the laboratory procedure adopted for specimen fabrication is representative of RCC construction, high-calcium dry bottom ash can be used effectively, as a fine aggregate, in pavement applications.
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