Abstract
The concepts of maturity and activation energy have been primarily used for prediction of compressive strength. Less frequently, these principles have been used for investigation of the temperature–time relationship of other properties. In this research, electrical conductivity was monitored over time for the period of 1–28 days for 10 concrete mixtures. It was found that the typical relationship that holds for compressive strength in relation to the maturity does not hold for conductivity. In addition, activation energy was determined by the Arrhenius relationship using four methods of calculating the rate constant. Values calculated for activation energy varied considerably depending on the method used with the exponential rate constant giving the lowest values. Comparing results to published literature, the linear hyperbolic method most often cited gives similar values of activation energy in this research to those published for either hydration or strength.
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