Modeling Cement Hydration Kinetics Using the Equivalent Age Concept

Published

March 29, 2012

Author(s)

Xueyu Pang, Dale P. Bentz, Christian Meyer

Abstract

In this study the hydration kinetics of four different types of cements during early ages were investigated by both chemical shrinkage and isothermal calorimetry tests. Chemical shrinkage tests were performed at both different temperatures and pressures while isothermal calorimetry tests were conducted only at different temperatures. The hydration kinetics curves at different curing conditions were found to converge reasonably well if properly transformed with a set of scaling factors. Therefore, the experimental hydration kinetics curve at one curing condition can be used to predict that of another curing condition using a single scale factor. The scale factor is similar to the coefficient used to compute the equivalent age of a specified curing condition when applying the maturity method to estimate concrete strength. Its dependence on curing temperature and curing pressure can be modeled by the activation energy and the activation volume of the cement, respectively.

Proceedings Title

3rd International Symposium on Ultra-High Performance Concrete and Nanotechnology for High-Performance Construction Materials

Conference Dates

March 7-9, 2012

Conference Location

Kassel, DE

Pub Type

Conferences

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Keywords

Chemical shrinkage, heat evolution, hydration kinetics, oil well cement, pressure, temperature.

Citation

Pang, X. , Bentz, D. and Meyer, C. (2012), Modeling Cement Hydration Kinetics Using the Equivalent Age Concept, 3rd International Symposium on Ultra-High Performance Concrete and Nanotechnology for High-Performance Construction Materials, Kassel, DE, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=910050 (Accessed December 11, 2024)