Research at PProGRess

We mainly investigate the chemical, physical and biological processes that influence structural and chemical changes in geomaterials. These processes include the weathering of building stones and concrete, crystallization of ice, salts and mineral phases inside porous media, dissolution of minerals by environmental impact and the behavior of fluids inside porous geological materials.
One of the most important experimental techniques we apply in this context is non-destructive imaging at the micron scale, particularly by X-ray micro-CT.

Building stone research

Building stones are sensitive to weathering and undergo internal changes through a complex interaction of chemical, physical and biological processes. Following a holistic approach, both geomaterials and extrinsic influences are viewed as part of a complex system. Our current research endeavours encompass a variety of projects, including:

• The link between nano- micro and macroscale processes inside natural stone
• The boundaries of the possibilities of the non-destructive imaging techniques and their improvement
• The prediction of the macroscopical behaviour based on microscopical study
• Data fusion of the different non-destructive imaging techniques to obtain maximum information
• The monitoring of internal changes due to external chemical, biological and/or physical changes
• The modelling of fluid flow behaviour inside the porespace of natural building stones
• The modelling and monitoring of crystallisation (e.g. of salts) in the pore space of natural building stones.

By data-fusion of non-destructive research techniques, we characterize the (sub)micron scale petrophysical properties of geomaterials and their internal fluid flow behaviour. Since 2005, the PProGRess group has co-operated the Centre for X-Ray Tomography (UGCT) (headed by Prof. L. Van Hoorebeke, Department of Physics and Astronomy, UGent), where "state-of-the-art" X-ray micro/nano-CT scanners have been developed.