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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: Method for Preparing SR-4 Strain Gages for Embedment in Concrete
Author(s): Edward C. Thoma and Robert E. Schneebeli
Publication: Journal Proceedings
Appears on pages(s): 305-316
Keywords: no keywords
Abstract:It has long been appreciated that analysis of concrete structures might be improved if a suitable means could be established for determining the behavior in the interior of a concrete mass. The very nature of its manufacture produces a heterogenous material, thereby invalidating the assumption of homogeniety which can be applied with reasonable truth in developing theo-retical analysis of most engineering materials. Aggregate distribution within the mass, gradation, maximum particle size, and other variables influence the behavior of a concrete structure. This paper presents a procedure for preparing and installing the SR-4 wire resistance strain gage within a concrete mass for the purpose of determining the behavior in the interior. Controlled laboratory studies of the gage unit itself, as well at gage units embedded in mortar and concrete, are reported to establish the reliability of the prepared SR-4 gage. In addition, preliminary studies of a field application, namely a highway slab installation, are included once they further establish the practicality and long-range reliability of the gage under severe test conditions.
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