Computers and Concrete

  • 제16권1호
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  • Pages.125-140
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  • 2015
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  • 1598-8198(pISSN)
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  • 1598-818X(eISSN)
테크노프레스 (Techno-Press)
권호 표지
DOI QR코드

DOI QR Code

Microstructural modelling of the elastic properties of tricalcium silicate pastes at early ages

  • Do, Huy Q. (Laboratoire des Materiaux de Construction, Ecole Polytechnique Federale de Lausanne (EPFL)) ;
  • Bishnoi, Shashank (Department of Civil Engineering, Indian Institute of Technology Delhi) ;
  • Scrivener, Karen L. (Laboratoire des Materiaux de Construction, Ecole Polytechnique Federale de Lausanne (EPFL))
  • 투고 : 2014.06.20
  • 심사 : 2015.07.10
  • 발행 : 2015.07.25
⟨ 이전 논문 다음 논문 ⟩

초록

This paper describes the numerical calculation of elastic properties of a simulated microstructure of cement paste from very early age, when most previous models fail to give accurate results. The development of elastic properties of tricalcium silicate pastes was calculated by discretising a numerical resolution-free 3D vector microstructure to a regular cubic mesh. Due to the connections formed in the microstructure as an artefact of the meshing procedure, the simulated elastic moduli were found to be higher than expected. Furthermore, the percolation of the solids was found to occur even before hydration started. A procedure to remove these artefacts, on the basis of the information available in the vector microstructures was developed. After this correction, a better agreement of the experimental results with calculations was obtained between 20% and 40% hydration. However, percolation threshold was found to be delayed significantly. More realistic estimates of percolation threshold were obtained if either flocculation or a densification of calcium silicate hydrate with hydration was assumed.

키워드

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피인용 문헌

  1. Microstructural Modeling of Early-Age Creep in Hydrating Cement Paste vol.142, pp.11, 2016, https://doi.org/10.1061/(ASCE)EM.1943-7889.0001144
  2. Reduced-order modeling analysis of shell structures buckling using a co-rotational solid-shell element vol.70, 2017, https://doi.org/10.1016/j.ast.2017.08.036
  3. Microstructural modelling of the strength of mortars containing fly ash using µic vol.163, 2018, https://doi.org/10.1016/j.conbuildmat.2017.12.163
  4. Microstructural simulation and measurement of elastic modulus evolution of hydrating cement pastes vol.130, pp.None, 2015, https://doi.org/10.1016/j.cemconres.2020.106007
  5. Microstructural modelling of autogenous shrinkage in Portland cement paste at early age vol.37, pp.9, 2015, https://doi.org/10.1108/ec-08-2019-0353