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Modeling of degradation processes in historical mortars
Affiliation:1. State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China;2. School of Materials Science and Engineering, Wuhan University of Technology, Wuhan 430070, China;3. School of Civil Engineering and Architecture, Wuhan University of Technology, Wuhan 430070, China;1. Department of Civil and Building Engineering, and Architecture, Polytechnic University of Marche, via Brecce Bianche, 60131 Ancona, Italy;2. School of Civil Engineering, University of Leeds, Leeds LS2 9JT, Leeds, United Kingdom;3. Department of Architecture, Built Environment and Construction Engineering ABC, Polytechnic of Milano, Piazza Leonardo da Vinci 32, 20133 Milan, Italy;4. Department of Structures for Engineering and Architecture, University of Naples “Federico II”, Piazzale Tecchio 80, 80125 Naples, Italy;1. Monmouth Medical Center, 300 2nd Avenue, Long Branch, NJ 07740, USA;2. Seaview Orthopaedic & Medical Associates, 1200 Eagle Avenue, Ocean, NJ 07712, USA;1. State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China;2. Applied Mechanics and Structure Safety Key Laboratory of Sichuan Province, School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu, Sichuan 610031, PR China
Abstract:The aim of presented paper is modeling of degradation processes in historical mortars exposed to moisture impact during freezing. Internal damage caused by ice crystallization in pores is one of the most important factors limiting the service life of historical structures. Coupling the transport processes with the mechanical part will allow us to address the impact of moisture on the durability, strength and stiffness of mortars. This should be accomplished with the help of a complex thermo-hygro-mechanical model representing one of the prime objectives of this work. The proposed formulation is based on the extension of the classical poroelasticity models with the damage mechanics. An example of two-dimensional moisture transport in the environment with temperature below freezing point is presented to support the theoretical derivations.
Keywords:Coupled heat and moisture transport  Ice crystallization process  Damage  Mortar  Numerical modeling  Pore pressure
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