Title:
The Carlson R-C (Reinforced Concrete) Meter
Author(s):
Dale E. Berner and Roy W. Carlson
Publication:
Journal Proceedings
Volume:
83
Issue:
4
Appears on pages(s):
629-632
Keywords:
beams (supports); creep properties; embedment; reinforced concrete;strain gages: stresses’; temperature-measuring instruments.
DOI:
10.14359/10631
Date:
7/1/1986
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.