Numerical modelling of moisture transfers with hysteresis within cementitious materials: Verification and investigation of the effects of repeated wetting–drying boundary conditions
| Autor: | Zhidong Zhang, Mickaël Thiery, Véronique Baroghel-Bouny |
|---|---|
| Přispěvatelé: | Princeton University, Formulation, Microstructure, Modélisation et Durabilité des Matériaux de Construction (IFSTTAR/MAST/FM2D), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-Communauté Université Paris-Est, Département Matériaux et Structures (IFSTTAR/MAST), Institut Français des Sciences et Technologies des Transports, de l'Aménagement et des Réseaux (IFSTTAR)-PRES Université Paris-Est |
| Rok vydání: | 2015 |
| Předmět: |
hysteresis (C)
Materials science Moisture 0211 other engineering and technologies 0207 environmental engineering cementitious materials (E) Humidity 02 engineering and technology Building and Construction drying-wetting cycles (A) [SPI.GCIV]Engineering Sciences [physics]/Civil Engineering Hysteresis moisture penetration depth (B) 021105 building & construction Coupling (piping) General Materials Science Relative humidity Geotechnical engineering Cementitious Boundary value problem Wetting 020701 environmental engineering Physics::Atmospheric and Oceanic Physics moisture transport (C) |
| Zdroj: | Cement and Concrete Research Cement and Concrete Research, Elsevier, 2015, 68, pp.10-23. ⟨10.1016/j.cemconres.2014.10.012⟩ |
| ISSN: | 0008-8846 |
| DOI: | 10.1016/j.cemconres.2014.10.012 |
| Popis: | International audience; In natural environment, the cover layer of reinforced concrete structures is affected by periodic variations of external relative humidity (RH). However, most moisture transport models in the literature only focus on drying of materials. In this study, a method coupling a moisture transport model with any kind of hysteresis modelling is presented. Two hysteresis models (conceptual and empirical) have been implemented and compared. The scope of the study is limited to cyclic variations of RH with no direct contact with liquid water during the wetting steps. Experimental data verifications show that the conceptual approach yields better results than the empirical one. Comparisons of non-hysteresis and hysteresis modellings have been carried out for different cycle durations, RH amplitudes and initial moisture states. All comparisons and investigations enhance the necessity of considering hysteresis to quantify moisture transport under repeated drying-wetting boundary conditions. |
| Databáze: | OpenAIRE |
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