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Paint and Coatings Industry Standards
C31 Standard Practice for Making and Curing Concrete Test Specimens in the Field
This practice provides standardized requirements for making, curing, protecting, and transporting concrete test specimens under field conditions.
If the specimens are made and standard cured, as stipulated herein, the resulting strength test data when the specimens are tested are able to be used for the following purposes:
Acceptance testing for specified strength,
Checking adequacy of mixture proportions for strength, and
Quality control.
If the specimens are made and field cured, as stipulated herein, the resulting strength test data when the specimens are tested are able to be used for the following purposes:
Determination of whether a structure is capable of being put in service,
Comparison with test results of standard cured specimens or with test results from various in-place test methods,
Adequacy of curing and protection of concrete in the structure, or
