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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: Lightweight Structural Concrete Proportioning and Control
Author(s): George H. Nelson and Otto C. Frei
Publication: Journal Proceedings
Appears on pages(s): 605-621
Keywords: no keywords
Abstract:Physical properties and gradation of an expanded shale aggregate produced in Georgia are given. Effect of fine aggregate:coarse aggregate ratio and effect of entrained air on properties of lightweight structural concrete are discussed. Recommends optimum air content for maximum strength of lightweight concrete with from 3 to 9 sacks of cement per cu yd. Proposes a proportioning method which makes use of a specific gravity factor. Using this proportioning method with aforementioned aggregate, tests were made on a series of mixes with from 3 to 9 sacks of cement,per cu yd. Properties reported include compressive, flexural, and bond strength; modulus of elasticity; diagonal tension; and thermal conductivity. Field control practices for lightweight structural concrete are briefly considered.
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