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Alkali concentrations of pore solution in hydrating OPC
AbstractIn order to study the pore solution, the release and binding of alkalis in a hydrating cement system have been studied. First, the binding factors for sodium and potassium as determined by Taylor [Adv. Cem. Res. 1 (1987) 5_16] and the corresponding distribution ratios as determined by Hong and Glasser [Cem. Concr. Res. 29 (1999) 1893_1903; Cem. Concr. Res. in press] are related to each other. It follows that the sorption of sodium is practically identical, whereas for potassium Taylor [Adv. Cem. Res. 1 (1987) 5_16] predicts a substantial lower degree of sorption. The concept of alkali release, pore solution decrease and sorption by formed C_S_H, is incorporated in the NIST hydration model (CEMHYD3D). Subsequently, the model is compared with OPC hydration experiments reported by Larbi et al. [Cem. Concr. Res. 20 (1990) 506_516]. Good agreement is obtained when the distribution ratios of Hong and Glasser [Cem. Concr. Res. 29 (1999) 1893_1903] are applied. The results suggest that C_S_H is the only binder of alkalis in hydrating OPC.
Alkali concentrations of pore solution in hydrating OPC
AbstractIn order to study the pore solution, the release and binding of alkalis in a hydrating cement system have been studied. First, the binding factors for sodium and potassium as determined by Taylor [Adv. Cem. Res. 1 (1987) 5_16] and the corresponding distribution ratios as determined by Hong and Glasser [Cem. Concr. Res. 29 (1999) 1893_1903; Cem. Concr. Res. in press] are related to each other. It follows that the sorption of sodium is practically identical, whereas for potassium Taylor [Adv. Cem. Res. 1 (1987) 5_16] predicts a substantial lower degree of sorption. The concept of alkali release, pore solution decrease and sorption by formed C_S_H, is incorporated in the NIST hydration model (CEMHYD3D). Subsequently, the model is compared with OPC hydration experiments reported by Larbi et al. [Cem. Concr. Res. 20 (1990) 506_516]. Good agreement is obtained when the distribution ratios of Hong and Glasser [Cem. Concr. Res. 29 (1999) 1893_1903] are applied. The results suggest that C_S_H is the only binder of alkalis in hydrating OPC.
Alkali concentrations of pore solution in hydrating OPC
Brouwers, H.J.H. (author) / vanEijk, R.J. (author)
Cement and Concrete Research ; 33 ; 191-196
2002-10-02
6 pages
Article (Journal)
Electronic Resource
English
Alkali concentrations of pore solution in hydrating OPC
| British Library Online Contents | 2003
Alkali concentrations of pore solution in hydrating OPC
| British Library Conference Proceedings | 2003
Alkali concentrations of pore solution in hydrating OPC
| Tema Archive | 2003
Alkali concentrations of pore solution in hydrating OPC
| Online Contents | 2003
| British Library Conference Proceedings | 2009