Cit:Mizutani.etal:2017
| Author | Mizutani, Etsuko; Ogura, D.; Ishizaki, T.; Abuku, M.; Sasaki, J. |
| Year | 2017 |
| Title | Measurement of salt solution uptake in fired clay brick and identification of solution diffusivity |
| Bibtex | @inproceedings {Mizutani.etal:2017,
title = {Measurement of salt solution uptake in fired clay brick and identification of solution diffusivity}, booktitle = {Proceedings of SWBSS 2017. Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures, University of Applied Sciences Potsdam, Germany, 20-22 September 2017}, year = {2017}, editor = {Laue, Steffen}, pages = {65-73}, month = {september}, organization = {Fachhochschule Potsdam}, publisher = {Verlag der Fachhochschule Potsdam}, note = {fulltext, conference paper}, key = {SWBSS2017}, doi = {10.5165/hawk-hhg/322}, author = {Mizutani, Etsuko; Ogura, D.; Ishizaki, T.; Abuku, M.; Sasaki, J.} } |
| DOI | 10.5165/hawk-hhg/322 |
| Link | File:SWBSS 2017 Proceedings 65-73 Mizutani Ogura Ishizaki Abuku Sasaki.pdf |
| Notes | in: Proceedings of SWBSS 2017 - Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures. University of Applied Sciences, Potsdam, Germany, 20-22 September 2017 |
Bibliography
| [Mizutani.etal:2017] | Mizutani, Etsuko; Ogura, D.; Ishizaki, T.; Abuku, M.; Sasaki, J. (2017): Measurement of salt solution uptake in fired clay brick and identification of solution diffusivity. In: Laue, Steffen (eds.): Proceedings of SWBSS 2017. Fourth International Conference on Salt Weathering of Buildings and Stone Sculptures, University of Applied Sciences Potsdam, Germany, 20-22 September 2017,Verlag der Fachhochschule Potsdam 65-73, 10.5165/hawk-hhg/322. |   |
Abstract[edit]
Salt solution uptake rates in fired clay brick were measured with γ-ray to investigate the influence of salt on solution diffusivity for appropriate numerical analysis of salt solution transfer and crystallization in porous materials. NaCl and Na2SO4 are the main salts confirmed in Hagia Sophia (Aya Sophia Museum), Istanbul, Turkey, and are used in this experiment. We identified solution diffusivity as a function of solution content by a numerical analysis of solution transfer. The main results are as follows. Solution uptake tests demonstrated that saturated solutions take approximately six times longer to attain a steady state than the time needed for pure water to obtain steady state. This was thought to be caused by the viscosity of the dissolved salts and the presence of crystallised salt in the material. We identified solution diffusivity by multiplying moisture diffusivity for pure water by a constant to reproduce the measured solution content in the cases where large amounts of efflorescence was observed at the material surface. In the case of a saturated solution of Na2SO4, which is considered the salt that most frequently precipitates into material, it was necessary to correct the solution diffusivity equation by considering the effect of in-pore salt precipitation.