Abstract
Changes in building methods and materials make it increasingly difficult to devise simple and reliable procedures for the design of projected structures that reflect the engineering experience gained from existing and failed structures. This is particularly true for the durability of concrete structures.
The durability of concrete structures is normally controlled by diffusion of harmful fluids through an exposed concrete surface. A model is described which allows the microstructure and moisture state of the exposed surface region to be quantified. The model can thus be used to illustrate how engineering parameters such as mix proportions, curing time and reinforcement cover can affect the physical aspects of durability.
Preliminary comparisons between the model and experiment show that moisture content, cement hydration and porosity predictions are encouragingly realistic. However it is emphasised that further verification of the model is required and that the model should be developed to include carbonation.
This is a preview of subscription content, log in via an institution to check access.
Access this chapter
Tax calculation will be finalised at checkout
Purchases are for personal use only
Preview
Unable to display preview. Download preview PDF.
References
Parrott, L.J. and D.C. Killoh. Prediction of Cement Hydration. To be published in Proc. Brit. Ceramic Soc.
Powers, T.C. and T.L. Brownyard. Studies of the Physical Properties of Hardened Portland Cement Paste. Portland Cement Assoc. Res. Dept. Bull., No. 22 Chicago (1948).
Parrott, L.J. Novel Methods of Processing Cement Gel to Examine and Control Microstructure and Properties. Phil. Trans. R. Soc. Lond. A 310 (1983) 155–166.
Parrott, L.J. Effect of Drying History upon the Exchange at Pore Water with Methanol and upon Subsequent Methanol Sorption Behaviour in Hydrated Alite Paste. Cement and Concrete Res. 10 (1981) 651–658.
Young, J.P. Humidity Control in the Laboratory using Salt Solutions - a Review. J. App. Chem. 17 (1967) 241–245-
Jungermann, S. The Chemical Process of the Carbonation of Concrete. Betonwerk + Fertigteil-Technik 6 (1982) 358–362.
R1LEM Int. Symp. Carbonation of Concrete. Cement and Concrete Assoc., Slough (1976).
Patel, R.G., L.J. Parrott, J.A. Martin and D.C. Killoh. Gradients of Microstructure and Diffusion Properties in Cement Paste Caused by Drying. To be published.
Author information
Authors and Affiliations
Editor information
Editors and Affiliations
Rights and permissions
Copyright information
© 1985 Martinus Nijhoff Publishers, Dordrecht
About this chapter
Cite this chapter
Parrott, L.J. (1985). Mathematical Modelling of Microstructure and Properties of Hydrated Cement. In: Masters, L.W. (eds) Problems in Service Life Prediction of Building and Construction Materials. NATO ASI Series, vol 95. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-5125-9_13
Download citation
DOI: https://doi.org/10.1007/978-94-009-5125-9_13
Publisher Name: Springer, Dordrecht
Print ISBN: 978-94-010-8766-7
Online ISBN: 978-94-009-5125-9
eBook Packages: Springer Book Archive