A computed-based model for the alkali concentrations in pore solution of hydrating Portland cement paste is proposed. Experimental data reported in different literatures with thirteen different recipes are analyzed.A3-D computer-based cement hydration modelCEMHYD3Dis used to simulate the hydration of these pastes. The models predictions are used as inputs for the alkali partition theory, which is used to derive the alkali binding capacity of C-S-H in hydrating Portland cement paste. A linear relation between the amount of boundalkali Na+ in C-S-H and its concentration in the pore solution is found, whilst a non-linear relation should be employed for the amount of bound-alkali K+ in C-S-H. New methods for predicting the alkali concentrations in the pore solution of hydrating Portland cement pastes are proposed based on the computer model CEMHYD3D, which is also validated with experimental results.
|Title of host publication||Excellence in concrete construction through innovation|
|Subtitle of host publication||proceedings of the International Conference on Concrete Construction, Kingston University, London, UK, 9-10 September 2008|
|Editors||Mukesh C. Limbachiya, Hsein Y. Kew|
|Place of Publication||Boca Raton, FL|
|Publication status||Published - 9 Sep 2008|
|Event||International Conference on Concrete Construction 2008 - Kingston University, Kingston upon Thames, United Kingdom|
Duration: 9 Sep 2008 → 10 Sep 2008
|Conference||International Conference on Concrete Construction 2008|
|City||Kingston upon Thames|
|Period||9/09/08 → 10/09/08|
Chen, W., Shui, Z. H., & Brouwers, H. J. H. (2008). A computed-based model for the alkali concentrations in pore solution of hydrating Portland cement paste. In M. C. Limbachiya, & H. Y. Kew (Eds.), Excellence in concrete construction through innovation: proceedings of the International Conference on Concrete Construction, Kingston University, London, UK, 9-10 September 2008 (pp. 207-214). Boca Raton, FL: CRC Press.