Benchmarking the CEMDATA07 database to model chemical degradation of concrete using GEMS and PHREEQC

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Abstract

The objective is on the implementation of a consistent thermodynamic database for cement systems at temperatures different from 25°C in geochemical computer codes based on mass action equation and constants (such as PHREEQC-2). The implementation of the cement/concrete thermodynamic database was verified first by comparing simulations of chemical detrimental reactions in cement systems using PHREEQC-2 and GEMS. Verification was done for simplified cement systems followed by a further verification addressing complex geochemical simulations of by means of benchmark calculations. The thermodynamic database for cement systems is used in studies to simulate the long-term evolution of geochemical conditions in the concrete in a near-surface disposal facility.

Details

Original languageEnglish
Title of host publicationCementitious materials in safety cases for geological repositories for radioactive waste: role, evolution and interaction
Place of PublicationParis, France
Pages285-288
Publication statusPublished - Mar 2012
EventCementitious Materials in Safety Cases for Geological Repositories for Radioactive Waste: Role, Evolution and Interactions - NEA IGSC, Brussels, Belgium
Duration: 17 Nov 200920 Nov 2009

Publication series

NameNEA/RWM report
NumberNEA/RWM/R(2012)3

Conference

ConferenceCementitious Materials in Safety Cases for Geological Repositories for Radioactive Waste: Role, Evolution and Interactions
CountryBelgium
CityBrussels
Period2009-11-172009-11-20

Keywords

  • cement phases database, thermodynamic simulation, verification, chemical concrete degradation

ID: 227038