- Author
-
Carino, N. J.
- Title
- Statistical Methods to Evaluate In-Place Test Results.
- Coporate
- National Institute of Standards and Technology, Gaithersburg, MD
- Book or Conf
- American Concrete Institute. New Concrete Technology: Robert E. Philleo Symposoum. SP-141-3. 1993,
Liu, T. C.; Hoff, G. C., Editors,
39-64 p.,
1993
- Keywords
-
statistical analysis
|
compressive strength
|
construction
|
in-place testing
|
loads (forces)
|
pullout tests
|
regression analysis
|
repeatability
|
safety
|
strength
|
tests
- Abstract
- In-place testing is used to estimate the compressive strength of concrete in a structure by measuring another related property. A strength relationship is used to convert the in-place test results to an estimate of the compressive strength. Statistical methods are needed for reliable estimates of in-place strength. Such methods should account for the uncertainities in the measured property, the uncertainty of the strength relationship, and the variability of the in-place concrete. Standard statistical procedures for dealing with these uncertainities have not yet been adopted in North American practice. Recommendations are provided for developing the strength relationship, and a reliable, easy-to-use approach is presented to estimate in-place characteristic strength.