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Earth Sciences at the University of Fribourg

Bern-Fribourg Master in Earth Sciences


Details of Courses

COURSE TITLE: Applied geochemistry and thermodynamic modelling of cement hydration
LECTURERS: Dr. Barbara Lothenbach
ECTS Credits:1.5
FORMAT:3-day workshop; lectures and hands-on computer simulations
FREQUENCY:biennially in spring semester, held in even years
CONTENTS:High-enthalpy systems such as hydraulic binders (e.g. cement paste, mortar and concrete) are subject to rapid and complex evolution of pore water composition and mineral assemblage during hydration. Thermodynamic equilibrium calculations are a valuable tool to understand the different processes in cementitious systems. They can help to understand the consequences of different factors such as cement composition, hydration, leaching or temperature on the composition and the properties of a hydrated cementitious system on a chemical level. Equilibrium calculations have been successfully used to compute the stable phase assemblages based on the solution composition as well as to model the stable phase assemblage in completely hydrated cements and thus to assess the influence of the chemical composition on the hydrate assemblage. In combination with a kinetic model, thermodynamic calculations can also be used to follow changes during hydration or, in combination with transport models, to calculate the interaction of cementitious systems with the environment. In all these applications, thermodynamic equilibrium calculations have been a valuable addition to experimental studies deepening our understanding of the processes that govern cementitious systems and interpreting experimental observations. The intention of this workshop is to give an introduction to GEMS, a thermodynamic modelling software using free energy minimization developed at PSI, and its applications to cementitious systems. The theoretical background of GEMS will be briefly discussed. The focus of this workshop will be on practical hands-on simulations with GEMS. A first part is planned as hands-on tutorial for beginners and to introduce the theoretical background. Some simple exercises will be available before the course such that the participants can become familiar with the software. The second part will concentrate on applications in the context of cement hydration, effects of different raw materials and additives, calculation and interpretation of saturation indices and modelling of the interaction with the environment.

(prer): Courses with prerequisites.

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University of Fribourg | Dépt. Géosciences ; Ch. du Musée 6 - Pérolles ; CH-1700 Fribourg |
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