Freeze Thaw Rig
The Freeze Thaw Rig was designed and built to evaluate the impact of freeze-thaw cycling via CO2 Joule Thomson induced freezing up to -55oC on 38mm diameter and 200mm diameter rock samples under isotropic stress .
The Freeze Thaw Rig is combined with state of the art analytical tools such as fibre optic strain, X-Ray CT and temperature sensing to investigate the influence of thermal gradients within rocks.
The experimental setup also facilitates sensitivity studies to investigate the effect of repeated freeze-thaw cycles and material integrity, rock failure mechanisms, freezing rock volume and temperature gradients.
The Freeze Thaw Rig is rated to provide:
- 38mm and 200mm diameter and length transparent artificial samples and rock samples
- Up to 80oC rock temperature.
- -55oC freezing through CO2 depressurisation Joule Thomson cooling
- Fibre optic strain measurements with the ODiSI-B data acquisition system provided by LUNA Technologies, with strain measurements every 2.6mm.
- Fluid and gas sampling (Hiden HPR20 mass spectrometer).
- X-Ray CT
- Fracture surface scanning using GOM ATOS III 3D scanner at the Advanced Forming Research Centre.
The team within the Applied Geoscience Laboratory welcomes scientific collaboration and are always happy to discuss new projects and experimental designs. Please contact:
This article was published on 5 Nov, 2019