A multiscale framework for the prediction of concrete self-desiccation

M. Pathirage, D. P. Bentz, G. Di Luzio, E. Masoero, G. Cusatis

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Scopus citations

Abstract

Cement hydration in concrete and mortar has been studied thoroughly over the past 50 years. To fully understand hydration in concrete and predict the evolution of the hygral, thermal, and mechanical properties at the structural level, one needs to studynot only the reaction kinetics but also the development of the microstructure. Many models have been developed for this purpose, some of them looking only at the micro-scale or at the macro-scale and others tackling the fundamental nature of the issue, which can be qualified as a multiscale problem. This paper proposes a novel approach that consists of combining a cement hydration model at the microstructural level, the CEMHYD3D model, with a macroscopic hygro-thermo-chemical model, the HTC model. The coupling is performed by post-processing the output of the CEMHYD3D model, in particular with reference to cement hydration degree, silica fume reaction degree, and amounts of evaporable water and chemically bound water in order to identify through a curve fitting routine the parameters of the HTC formulation. This approach allows the possibility of predicting concrete behavior at multiple scales based on the actual chemical and microstructural evolution, thus enhancing the capabilities of the so-called HTC-CEMHYD3D model. This paper focuses on 1) introducing the concepts behind the formulation of self-desiccation and 2) demonstrating the predictive capabilities of the coupled model using some available experimental data.

Original languageEnglish (US)
Title of host publicationComputational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018
EditorsBernhard Pichler, Jan G. Rots, Günther Meschke
PublisherCRC Press/Balkema
Pages203-208
Number of pages6
ISBN (Print)9781138741171
DOIs
StatePublished - Jan 1 2018
EventConference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018 - Bad Hofgastein, Austria
Duration: Feb 26 2018Mar 1 2018

Publication series

NameComputational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018

Conference

ConferenceConference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018
CountryAustria
CityBad Hofgastein
Period2/26/183/1/18

ASJC Scopus subject areas

  • Modeling and Simulation
  • Civil and Structural Engineering

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  • Cite this

    Pathirage, M., Bentz, D. P., Di Luzio, G., Masoero, E., & Cusatis, G. (2018). A multiscale framework for the prediction of concrete self-desiccation. In B. Pichler, J. G. Rots, & G. Meschke (Eds.), Computational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018 (pp. 203-208). (Computational Modelling of Concrete Structures - Proceedings of the conference on Computational Modelling of Concrete and Concrete Structures, EURO-C 2018). CRC Press/Balkema. https://doi.org/10.1201/9781315182964-25