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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: Concrete in Chicago’s Rapid Transit System
Author(s): Harold E. Nelson
Publication: Journal Proceedings
Appears on pages(s): 1-5
Keywords: barriers; Chicago; concrete construction;costs; manufacturing; precast concrete; railroad ties; rapid transit railways; strength; tests;vibration.
Abstract:Describes two of the uses of concrete in the development of a rapid transit system for Chicago, III. The use of median right-of-ways in existing expressways required special barriers in certain locations to protect people and property from possible harm due to automobile accidents. A precast unit that was selected for this purpose is described. Wood ties for the tracks were fficult to obtain and expensive. The search for alternates is discussed and two types of concrete ties were investigated. The ties are described and the manufacture of the tie chosen is discussed.
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