Radiographical investigation of fluid penetration processes in natural stones used in historical buildings

0430537 - ÚTAM 2015 RIV GB eng J - Journal Article
Koudelka_ml., Petr - Jandejsek, Ivan - Doktor, Tomáš - Kytýř, Daniel - Jiroušek, Ondřej - Zíma, Pavel - Drdácký, Miloš
Radiographical investigation of fluid penetration processes in natural stones used in historical buildings.
Journal of Instrumentation. Roč. 9, č. 5 (2014), C05040. ISSN 1748-0221. E-ISSN 1748-0221.
[International workshop on radiation imaging detectors /15./. Paris, 23.06.2013-27.06.2013]
R&D Projects: GA ČR(CZ) GBP105/12/G059
Institutional support: RVO:68378297
Keywords : computerized tomography (CT) * computed radiography (CR) * inspection with X-rays * X-ray radiography * digital radiography (DR)
Subject RIV: JN - Civil Engineering
Impact factor: 1.399, year: 2014
https://doi.org/10.1088/1748-0221/9/05/C05040

In order to ensure sustainability if historic buildings their technical state has to be inspected on regular basis. Damage assessment has to be preferably carried out using non-destructive methods otherwise damage accumulation may occur during life-cycle of the constructions. According to character of detected damage appropriate intervention measures (i.e. strengthening, consolidation, etc.) have to be then efficiently applied. Among other factors significantly influencing life span of constructions weathering agents (rain, erosion, dissolution, etc.) may cause rapid degradation of mechanical properties. In this paper X-ray radiograhical imaging was used to describe fluid penetration process in porous Maastricht limestone that is commonly used for restoration purposes. The imaging was performed in custom radiography device simulating practical in-situ measurements using microtube device. This device is a modified Karsten tube capable of determining absorbed volume and its speed even on inclined surfaces. However actual fluid penetration process in terms of saturation depth/volume ratio and shape of fluid wave propagating through microstructure is indeterminable using microtube. For this purpose real-time radiography imaging of fluid saturation process was performed to investigate behaviour of fluid in the material. Furthermore X-ray computed microtomography was performed to develop finite element model for simulation of fluid flow in the porous microstructure.
Permanent Link: http://hdl.handle.net/11104/0245148