Cit:Mizutani.etal:2021

Autor	Mizutani, E.; Ogura, D.; Abuku, M.; Derluyn, H.
Jahr	2021
Titel	Evaluation of change in pore network structure caused by halite crystallisation
Bibtex	@inproceedings { Mizutani.etal:2021, title = {Evaluation of change in pore network structure caused by halite crystallisation }, booktitle = {Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures}, year = {2021}, editor = {Lubelli, B.; Kamat, A.A.; Quist, W.J.}, pages = {173-181}, publisher = {TU Delft Open}, note = {Pore clogging by salt crystallisation significantly changes both vapour and liquid moisture transport. This study aimed to quantify salt crystal distribution in porous materials and the change in the pore network structure before and after salt crystallisation to evaluate the effects of pore clogging on the mass transport phenomena. Three-dimensional scanning by synchr otron X-ray computed tomography (SPring-8, Japan) was conducted to quantify the time change in salt crystal distribution during evaporation.Fired clay brick specimens saturated with a salt (NaCl) solution were dried under ambient conditions and scanned at specific time instants. The amount of the salt crystal determined by image analysis was consistent with the estimated values obtained by the weight measurement of vaporised water. Additionally, the pore size distribution, tortuosity and effective porosity and specific surface area before and after salt precipitation are calculated by the 3D medial axis(3DMA) processing with segmented images to investigate the change of saturated hydraulic conductivity and vapour diffusivity due to salt precipitation. Below a certain depth, the physical properties decreased linearly with increasing salt occupancy.}, key = {SWBSS 2021}, url = {https://predict.kikirpa.be/wp-content/uploads/2021/12/SWBSS2021_Procedings.pdf }, author = {Mizutani, E. and Ogura, D. and Abuku, M. and Derluyn, H. } }
DOI
Link
Bemerkungen	in: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 173-181

Eintrag in der Bibliographie

[Mizutani.etal:2021]

Mizutani, E.; Ogura, D.; Abuku, M.; Derluyn, H. (2021): Evaluation of change in pore network structure caused by halite crystallisation . In: Lubelli, B.; Kamat, A.A.; Quist, W.J. (Hrsg.): Proceedings of SWBSS 2021 – Fifth International Conference on Salt Weathering of Buildings and Stone Sculptures,TU Delft Open 173-181, Webadresse.

Keywords

Crystallisation, pore clogging, tortuosity, pore size distribution, image analysis

Abstract

Pore clogging by salt crystallisation significantly changes both vapour and liquid moisture transport. This study aimed to quantify salt crystal distribution in porous materials and the change in the pore network structure before and after salt crystallisation to evaluate the effects of pore clogging on the mass transport phenomena. Three-dimensional scanning by synchr otron X-ray computed tomography (SPring-8, Japan) was conducted to quantify the time change in salt crystal distribution during evaporation.Fired clay brick specimens saturated with a salt (NaCl) solution were dried under ambient conditions and scanned at specific time instants. The amount of the salt crystal determined by image analysis was consistent with the estimated values obtained by the weight measurement of vaporised water. Additionally, the pore size distribution, tortuosity and effective porosity and specific surface area before and after salt precipitation are calculated by the 3D medial axis (3DMA) processing with segmented images to investigate the change of saturated hydraulic conductivity and vapour diffusivity due to salt precipitation. Below a certain depth, the physical properties decreased linearly with increasing salt occupancy.

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