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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: Placing Concrete by Pumping Methods
Author(s): ACI Committee 304
Publication: Journal Proceedings
Appears on pages(s): 327-347
Keywords: admixtures; aggregate gradation; aggregates; cement content: coarse
aggregates; concrete construction; concretes: conveying; couplings; fine aggregates;fineness modulus; lightweight aggregate concretes; lightweight aggregates; mix proportioning.
Abstract:Describes piston, pneumatic, and squeeze-pressure type pumps for transporting and placing structural concrete. Rigid and flexible pipelines are discussed, couplings and other accessories described, and delivery capacity for various sizes of lines reported. Recommendations for proportioning pumpable concrete suggest optimum gradation of aggregates; outline water, cement, and admixture requirements; and emphasize the need for field testing of trial mixes for pumpability. Importance of presoaking of lightweight aggregates is stressed. Suggestions are given for layout of lines: for maintaining uniform delivery rate as well as uniform quality of concrete at the end of the line; and for cleaning out pipelines, This report does not cover shotcreting or pumping of nonstructural insulating or cellular types of concrete.
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