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http://dx.doi.org/10.14190/JRCR.2017.5.4.488

Thermodynamic Modelling of Blast Furnace Slag Blended Cement Composites  

Yang, Young-Tak (Department of Civil.Environment Engineering, University of Ulsan)
Cha, Soo-Won (Department of Civil.Environment Engineering, University of Ulsan)
Publication Information
Journal of the Korean Recycled Construction Resources Institute / v.5, no.4, 2017 , pp. 488-495 More about this Journal
Abstract
In this study, we conducted the kinetic hydration modeling of OPC and the final product according to the substitution ratio of GGBS by using the geochemical code, GEMS, in order to calculate the thermodynamic equilibrium. The thermodynamic data was used by GEMS's 3rd party database, Cemdata18, and the cement hydration model, the Parrot & Killoh model was applied to simulate the hydration process. In OPC modeling, ion concentration of pore solution and hydration products by mass and volume were observed according to time. In the GGBS modeling, as the substitution rate increases, the amount of C-S-H, which contributes the long-term strength, increases, but the amount of Portlandite decreases, which leads to carbonation and steel corrosion. Therefore, it is necessary to establish prevention of some deterioration.
Keywords
Kinetic hydration modeling; Thermodynamic equilibrium; Ordinary portland cement; Ground-granulated blast-furnace slag;
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