Thesis supervisor: Nikoletta Rozgonyi-Boissinot
Location of studies (in Hungarian): BME Geotechnika és Mérnökgeológia Tanszék Abbreviation of location of studies: BMEGM
Description of the research topic:
Exploration of the deformation and failure mechanism of rocks over long-term loads provides important knowledge about the stability studies of underground facilities and rock slopes. In most cases, laboratory and in-situ examinations cannot be done for several months or even years, so the research of the long-term mechanical properties of rocks is a very important activity.
There are many data available about the mechanical behaviour of porous limestone on short-term loads. However, their rheological behaviour, due to long-term loads, still requires research.
The objective of this project will be the determination of the creep deformation caused by long term uniaxial load, both in air-dry and in water-saturated state. The candidate must collect the typical types of the Miocene highly porous limestone of Hungary.
It should be investigated how the texture and structure of limestone influence the slow deformations. There is a need to look for a correlation between the porosity, quartz content, particle size of the limestone types and their rheological properties. The candidate must investigate the structural changes, porosity reduction and pore distribution of the rock during the long-term load. A relationship between grain size, tissue properties and slow deformation during creep must be found.