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A Comparison Study of Portland Cement Hydration Kinetics as Measured by Chemical Shrinkage and Isothermal Calorimetry

Published

Author(s)

Xueyu Pang, Dale P. Bentz, Christian Meyer, Gary Funkhouser, Robert Darbe

Abstract

Two different methods of evaluating cement hydration kinetics, namely chemical shrinkage and isothermal calorimetry tests, are used to investigate the early stage hydration of different classes of oilwell cement at various temperatures. For a given cement paste, the hydration kinetics curves measured by the two methods are proportional to each other at the same curing temperature. The ratio of heat of hydration to chemical shrinkage for different cements used in this study ranges from 7500 J/mL to 8000 J/mL at 25 °C and increases almost linearly with increasing curing temperature at a rate that varies only slightly with cement composition (approximately 58 J/mL per °C). A previously proposed scale factor model for simulating the effect of curing temperature and pressure on cement hydration kinetics is further validated in this study for its temperature aspect. The model is shown to be particularly helpful in correcting for slight temperature errors in the experiments.
Citation
Cement and Concrete Composites
Volume
39

Keywords

Cement hydration, chemical shrinkage, heat of hydration, isothermal calorimetry, oilwell cement.

Citation

Pang, X. , Bentz, D. , Meyer, C. , Funkhouser, G. and Darbe, R. (2013), A Comparison Study of Portland Cement Hydration Kinetics as Measured by Chemical Shrinkage and Isothermal Calorimetry, Cement and Concrete Composites, [online], https://doi.org/10.1016/j.cemconcomp.2013.03.007, https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=912433 (Accessed April 20, 2024)
Created April 30, 2013, Updated October 12, 2021