Journal Published Online: 01 June 1999
Volume 21, Issue 1

Evaluation of Precision of a Nuclear Gauge for Measurement of Water and Cement Content of Fresh Concrete



An experimental program was conducted to develop a precision statement for a commercially available nuclear field gauge developed to measure both water and cement contents of fresh concrete. Five gauges were tested at a single site. Three separate batches of concrete having different mixture proportions were tested; each gauge was run by a single operator. Data analysis was carried out following ASTM C 802-94 and the precision statements were developed in accordance with ASTM C 670-91a. Gauge count ratio was used rather than actual cement and water content to avoid the errors associated with gauge calibration. The “one-sigma limit” and the “difference two-sigma limits” were obtained. The precision estimates appear to reflect actual experience with the gauge and can be used to compare results obtained in the field.

Author Information

Nagi, M
Construction Technology Laboratories, Inc., Skokie, IL
Whiting, D
Construction Technology Laboratories, Inc., Skokie, IL
Pages: 11
Price: $25.00
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Stock #: CCA10502J
ISSN: 0149-6123
DOI: 10.1520/CCA10502J