Compatible Datum Temperature and Activation Energy for Concrete Maturity


  • The International Concrete Abstracts Portal is an ACI led collaboration with leading technical organizations from within the international concrete industry and offers the most comprehensive collection of published concrete abstracts.

International Concrete Abstracts Portal


Title: Compatible Datum Temperature and Activation Energy for Concrete Maturity

Author(s): Chang Hoon Lee and Kenneth C. Hover

Publication: Materials Journal

Volume: 113

Issue: 2

Appears on pages(s): 197-206

Keywords: activation energy; concrete strength; datum temperature; mathematical modeling; maturity; physical chemistry; temperature effects

Date: 3/1/2016

Maturity methods are used to predict strength or other mechanical properties of a concrete mixture for a given moisture availability as a function of time and temperature. Temperature sensitivity of a mixture is characterized by datum temperature for the Nurse-Saul (NS) method, and by activation energy for the Freiesleben-Hansen and Pederson method (FHP). While these methods and their defining parameters were independently developed, the parameters are nevertheless interdependent, as a change in a concrete mixture that affects temperature sensitivity as expressed by datum temperature will also be reflected in a change of activation energy, and vice versa. This paper addresses the temperature- and mixturedependent relationship between datum temperature and activation energy, using both a closed-form equation based on chemical kinetics and experimental data where values of datum temperature and activation energy were found to provide the best fit to strength data. Best-fit results validate the closed-form solution.