NUMERICALLY ACCELERATED CHEMICAL EVOLUTION IN CEMENTITIOUS SYSTEMS

Author(s): Janez Perko (1), Diederik Jacques(1)
Paper category: Proceedings
Book title: SynerCrete’18 International Conference on Interdisciplinary Approaches for Cement-based Materials and Structural Concrete
Editor(s): Miguel Azenha, Dirk Schlicke, Farid Benboudjema, Agnieszka Jędrzejewska
ISBN: 978-2-35158-202-2
e-ISBN: 978-2-35158-203-9
Publisher: RILEM Publications SARL
Publication year: 2018
Pages: 761-766
Total Pages: 6
Language : English

Abstract: This paper describes the approach for numerical acceleration of reactive transport pore-scale models where transport dominates dissolution/precipitation processes. Chemical changes in cementitious systems are typically transport dominated because of slow chemical reaction rates. The conditions under which the acceleration is possible and the level of acceleration are analysed. For this purpose we derive a new dimensionless number. On this basis the applicability of the approach is demonstrated on a simple system as well as on complex systems and applied to dissolution processes. The result demonstrate that, in the case of calcium leaching from hardened cement paste the dissolution can be accelerated for 50 times.

Online publication : 2018
Publication type : full_text
Public price (Euros) : 0.00