Numerical calculations and modelling of changes in stone and at stone/mortar interface

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Nyilvántartási szám: 
17/08
Témavezető neve: 
Témavezető e-mail címe:
torok.akos@epito.bme.hu
A témavezető teljes publikációs listája az MTMT-ben:
A téma rövid leírása, a kidolgozandó feladat részletezése: 
 
Significant amount of historic monuments were made of stone and mortar and the preservation of these construction materials requires the understanding of their deterioration processes. It has been known for many years that several factors are responsible for stone decay. The main trigger mechanisms are related to temperature changes, to salt crystallisation, to changes in humidity and moisture, air pollution. The observation of these changes on time can be made by developing an intelligent monitoring system. This system provides continuous, uninterrupted information on the condition of the monumental stone and historic mortar by different sensors and allows for the planning of the restoration prior to severe adverse effects. The PhD programme focuses on the calculation and numerical modelling of these changes. The input data for the modelling will be obtained from laboratory tests and data collected by sensors. The candidate will perform numerical modelling by using FEM software. Rocscience software family is available at our department and additional software will be accessed via international and national co-operation (FLAC 3D). These models will be adopted and used to characterize stone and mortar decay and processes acting at stone/mortar interface The numerical models are verified by laboratory and in situ experiments that allow the description of these changes. The PhD topic is related to the National Research, Development and Innovation Fund (OTKA-NKFI) supported project lead by the supervisor: ‘Surface properties of monumental stone and restoration mortar; monitoring the changes’ (ref. no. K 116532). 
A téma meghatározó irodalma: 
Rajan, G., Ramakrishnan, M., Semenova, Y., Ambikairajah, E., Farrell, G., Peng, G.D. (2014). Experimental Study and Analysis of a Polymer Fiber Bragg Grating Embedded in a Composite Material. Journal of Lightwave Technology, 32, 1726-1733
 
Török Á, Vásárhelyi B (2010): The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Engineering Geology 115(3-4), 237-245.
A téma hazai és nemzetközi folyóiratai: 
- Engineering Geology
 
- Bulletin of Engineering Geology and the Environment
 
- Geotechnical and Geological Engineering
 
- Environmental Earth Sciences
 
- Journal of Cultural Heritage
 
- International Journal of Rock Mechanics and Mining Sciences
A témavezető utóbbi tíz évben megjelent 5 legfontosabb publikációja: 
- Török, Á., Přikryl, R. 2010. Current methods and future trends in testing, durability analyses and provenance studies of natural stones used in historical monuments. Engineering Geology, 115,3-4, 139-142.
 
- Török, Á., Vásárhelyi B. 2010. The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Engineering Geology, 115,3-4, 237-245.
 
- McAlister, J.J., Smith, B.J., Török Á. 2008. Transition metals and water-soluble ions in deposits on a building and their potential catalysis of stone decay. Atmospheric Environment, 42, 7657–7668.
 
- Török Á. 2008. Black crusts on travertine: factors controlling development and stability, Environmental Geology, 56, 583-597.
A témavezető fenti folyóiratokban megjelent 5 közleménye: 
- Szemerey-Kiss B, Török Á 2017. Failure mechanisms of repair mortar stone interface assessed by pull-off strength tests. Bulletin of Engineering Geology and the Environment. 76, 159-167.
 
- Al-Omari, A., Beck, K., Brunetaud, X., Török Á., Al-Mukhtar, M. 2015. Critical degree of saturation: A control factor of freeze-thaw damage of porous limestones at Castle of Chambord, France. Engineering Geology. 185, 71-80.
 
-Török, Á., Licha, T., Simon, K., Siegesmund, S. (2011) Urban and rural limestone weathering; the contribution of dust to black crust formation. Environmental Earth Sciences, 63, 675–693
 
- Török, Á., Přikryl, R. 2010. Current methods and future trends in testing, durability analyses and provenance studies of natural stones used in historical monuments. Engineering Geology, 115,3-4, 139-142.
 
- Török, Á., Vásárhelyi B. 2010. The influence of fabric and water content on selected rock mechanical parameters of travertine, examples from Hungary. Engineering Geology, 115,3-4, 237-245. 

A témavezető eddigi doktoranduszai

Czinder Balázs (2015/2018/)
Török Anita (2014//)
Farkas Orsolya (2014/2018/2019)
Barsi Ildikó (2009/2012/)
Bodnár Nikolett Katalin (2010/2013/2016)
Szemerey-Kiss Balázs (2008/2011/2013)
Deák Ferenc (2007//)
Görög Péter (2002/2005/2009)
Forgó Lea Zamfira (2003/2006/2009)
Státusz: 
elfogadott