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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: The Carlson R-C (Reinforced Concrete) Meter
Author(s): Dale E. Berner and Roy W. Carlson
Publication: Journal Proceedings
Appears on pages(s): 629-632
Keywords: beams (supports); creep properties; embedment; reinforced concrete;strain gages: stresses’; temperature-measuring instruments.
Abstract:The Carlson R-C (reinforced concrete) Meter is a unique instrument for measuring stresses and strains within reinforced concrete. The R-C Meter is distinguished from other instruments in that it physically simulates a steel reinforcing bar embedded within the concrete and consequently measures the true stress and strain within the neighboring reinforcing bars, regardless of the presence of cracks. Other features of the R-C Meter include: I) long-term stability, 2) the ability to measure temperature, 3) ease of placement, and 4) ruggedness. The R-C Meter was compared with other strain meters embedded within a concrete beam that was tested in flexure at the University of California at Berkeley. The tests indicated that the Carlson R-C Meter accurately measured stress, strain, temperature, and creep, and was also unaffected by focal stress/strain concentrations that significantly affected the readings of the other strain meters tested.
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