Cit:Guelker.etal:2004
| Autor | Gülker, G. and Hinsch, K. and El Jarad, A. |
| Jahr | 2004 |
| Titel | Monitoring of salt-induced deformations in porous systems by Microscopic Speckel Pattern Interferometry |
| Bibtex | |
| DOI | - |
| Link | https://uol.de/fileadmin/user_upload/physik/ag-ehemalige/aop/download/paper/Guelker_2004_STONE.pdf |
| Bemerkungen | in: Kwiatkowski, Daniel; Löfvendahl, Runo (Hrsg.): 10th International Congress on Deterioration and Conservation of Stone, Proceedings, Stockholm, S.619-626 |
Eintrag in der Bibliographie
| [Guelker.etal:2004] | Gülker, Gerd; Hinsch, Klaus; El Jarad, A. (2004): Monitoring of salt-induced deformations in porous systems by Microscopic Speckel Pattern Interferometry. In: Kwiatkowski, Daniel; Löfvendahl, Runo (Hrsg.): 10th International Congress on Deterioration and Conservation of Stone, Proceedings, Stockholm, June 27 - July 2, , 619-626. |  |
Abstract[Bearbeiten]
Electronic speckle pattern interferometry (ESPI) has been used to monitor micro-deformations produced by phase transitions of magnesium sulfate in a porous material. Samples of fritted glass were chosen as a standard porous substrate because of its mean grain size, its porosity distribution, and its negligible humidity expansion. The glass sam-ples, soaked with salt solution, were exposed to changes in the relative humidity of the sur-rounding air. Due to the small grains of the samples in the range of 10 to 100 μm an ESPI-system with high lateral resolution was realized by imaging through a microscope and us-ing a HeCd-laser of short wavelength. For the first time deformations produced in a porous substrate during a hydration-dehydration cycle were successfully registered with high spa-tial resolution. The results are discussed on the basis of theoretical predictions.
Keywords[Bearbeiten]
electronic speckle pattern interferometry, deformation measurement, salt crys-tallization, phase transition, porous material, dilation measurements, scanning electron microscopy.