A whole range hygric material model: Modelling liquid and vapour transport properties in porous media

Scheffler, Gregor A.; Plagge, Rudolf

doi:10.1016/j.ijheatmasstransfer.2009.09.030

Cited by 61 publications

(42 citation statements)

References 39 publications

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“…The material reduction is obtained by dry-cup and wet-cup vapor diffusion experiments, which yield the vapor resistance factor s v . The moisture dependency can be taken into account, based on the reduction of available pore space, through a scaling factor f v depending on S g w [22]. While increasing the moisture content or the amount of precipitated salt, the permeability decreases in accordance with the reduction of the cross section available for gas transport.…”

Section: Constitutive Relationsmentioning

confidence: 99%

A coupled multiphase model for hygrothermal analysis of masonry structures and prediction of stress induced by salt crystallization

Castellazzi

Colla

Miranda

et al. 2013

Construction and Building Materials

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Section: Constitutive Relationsmentioning

confidence: 99%

A coupled multiphase model for hygrothermal analysis of masonry structures and prediction of stress induced by salt crystallization

Castellazzi

Colla

Miranda

et al. 2013

Construction and Building Materials

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“…This is shown by additional convective terms in their respective transport equations. Whereas air pressure can have a significant influence on the drying processes of concrete [Mainguy et al, 2001], the characterization of moisture transport properties of a material require the hypothesis of a constant atmospheric pressure, which is often the case in the modelling of coupled heat and mass transfer [Janssen et al, 2007] or in the modelling of material properties [Scheffler and Plagge, 2010].…”

Section: Isothermal Moisture Transport Equationmentioning

confidence: 99%

Influence of Diffuse Damage on the Water Vapour Permeability of Fibre-Reinforced Mortar

et al. 2012

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The study of moisture transfer inside building materials is an important issue in building physics. The hygric characterization of such materials has become a common practice for the estimation of the hygrothermal performance of buildings. However, their aging caused by mechanical loading and environmental factors inevitably affects their permeability to moisture ingress, and the knowledge of how this permeability is affected by damage and cracks is still incomplete.The effects of diffuse damage caused by mechanical loading on the water vapour permeability of fibre-reinforced mortar were studied. A full experimental setup is presented including observation of the porous structure, mechanical, and hygric characterization. Uniaxial tensile loading was applied on prismatic samples while their damage level was measured. Then, the moisture content of damaged and undamaged samples was monitored during variations of ambient relative humidity. Two numerical methods are presented and used for the comparison of the water vapour permeability of multiple samples presenting various levels of damage. By this methodology, diffuse damage caused by mechanical loading is shown to have an impact on the water vapour transfer inside the material.

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“…The reason may be that the water absorption coefficient is only one of clustering variables in the analysis, while other variables together may play more roles in the clustering. Different material models (Carmeliet and Roels, 2001;Grunewald et al, 2003;Krus and Holm, 1999;Ku¨nzel, 1995;Scheffler and Plagge, 2010) can be applied for generic material characterization. The detailed characterization procedure is described in Zhao et al (2015).…”

Section: Derivation Of Generic Materials In Brick Categorymentioning

confidence: 99%

Application of clustering technique for definition of generic objects in a material database

Zhao

Plagge

Ramos

et al. 2015

Journal of Building Physics

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In this article, generic objects are introduced into material databases of building simulation tools. A generic object has the common characteristics of one type of specific object and can represent specific ones in the simulation. The application of generic objects only requires some general design information; thus, it is convenient for the simulation users who do not have a detailed knowledge of building specification in the early design stage. First, the method to uncover the underlying cluster structure in the dataset is illustrated. Clustering of the objects depends on the adopted clustering variables and clustering procedure. Therefore, different clustering techniques are applied to agglomerate specific materials into different clusters, and the clustering solutions are compared for validation. Generic synthesis is then conducted to derive the generic material from each identified cluster. The approach on how to apply generic materials to fill in missing values of the incomplete material data is also described.

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A whole range hygric material model: Modelling liquid and vapour transport properties in porous media

Cited by 61 publications

References 39 publications

A coupled multiphase model for hygrothermal analysis of masonry structures and prediction of stress induced by salt crystallization

A coupled multiphase model for hygrothermal analysis of masonry structures and prediction of stress induced by salt crystallization

Influence of Diffuse Damage on the Water Vapour Permeability of Fibre-Reinforced Mortar

Application of clustering technique for definition of generic objects in a material database

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