Numerical modeling of drying shrinkage deformation of cement-based composites by coupling multiscale structure model with 3D lattice analyses
•A multiscale-structure-based model is proposed coupling with 3D lattice analyses.•Drying behaviors of C-S-H gels, cement paste and mortar are investigated.•Water desorption in capillary pores at 100%-to-85% RH range is incorporated.•Water desorption in gel pores at 85%-to-50% RH range is incorporat...
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Veröffentlicht in: | Computers & structures 2017-01, Vol.178, p.88-104 |
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Hauptverfasser: | , , , , |
Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | •A multiscale-structure-based model is proposed coupling with 3D lattice analyses.•Drying behaviors of C-S-H gels, cement paste and mortar are investigated.•Water desorption in capillary pores at 100%-to-85% RH range is incorporated.•Water desorption in gel pores at 85%-to-50% RH range is incorporated.
This paper presents a multiscale model for the drying shrinkage deformation of cement-based composites by incorporating its corresponding multiscale computer-generated structure at different scales in a three-dimensional lattice model. Assuming effects of capillary tension and disjoining pressure are the reason for the drying deformation, water desorption in capillary pores within 100%-to-85% RH range and that in gel pores within 85%-to-50% RH range are investigated. Drying behaviors of C-S-H gels, cement paste and mortar are studied by gradual upscaling. Experimental results for cement paste and mortar are utilized for validation. Parameter-determination and parameter-passing associated with the multiscale model are discussed. |
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ISSN: | 0045-7949 1879-2243 |
DOI: | 10.1016/j.compstruc.2016.10.005 |