Application of a pore-scale reactive transport model to study the influence of pore network characteristics on calcium leaching in cementitious systems

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Abstract

A lattice Boltzmann based pore scale reactive transport model is used with a reactive term computed using a simplified reaction model for portlandite system. This simplified reaction model is pre-computed using full geochemical model. This approach is computationally more efficient and was found to be reasonably accurate for pore-scale simulation when compared to full geochemical model. To explore the role of pore network characteristics on transport properties and the calcium leaching front, the developed approach was applied to a series of simulations on randomly simulated pore structure. In particular the influence of particle shape, particle size, porosity and tortuosity was investigated. It was found that the parameters governing transport of species such as porosity and tortuosity have a more dominant effect on leaching compared to parameters related to the particle shape and size such as surface area.

Details

Original languageEnglish
Title of host publicationCONMOD 2014. Proceedings of the RILEM International Symposium on Concrete Modelling
Place of PublicationFrance
Pages359-366
Volume1
Publication statusPublished - Oct 2014
EventCONMOD 2014 - Symposium on concrete Modelling - RILEM and Tsinghua University, Beijing, China
Duration: 12 Oct 201414 Oct 2014

Conference

ConferenceCONMOD 2014 - Symposium on concrete Modelling
CountryChina
CityBeijing
Period2014-10-122014-10-14

Keywords

  • lattice Boltzmann method, reactive transport, pore scale modelling, geochemistry

ID: 372552