United States Department of Transportation
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Rapid test methods for the evaluation of concrete properties.
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1982-01-01
[PDF-1.05 MB]
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Abstract:The objective of the project was to place a CERL/Kelly-Vail testing unit and a microwave oven in the field to perform tests of plastic concrete on construction projects.
The CERL/K-V tests were to determine water and cement content of the concrete and were evaluated as a method of predicting 28-day concrete strength.
Although the water and cement contents can be determined with a reasonable degree of accuracy, there are too many variables involved in the field to accurately predict strength.
The microwave oven used in the defrost mode is a fast and accurate method to determine water content with a minimum of equipment and operator training.
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