About this Abstract |
Meeting |
TMS Specialty Congress 2025
|
Symposium
|
The 7th International Congress on 3D Materials Science (3DMS 2025)
|
Presentation Title |
Multimodal Characterisation of Calcite Crystals Precipitated From Bio-Cementation |
Author(s) |
Marilyn Sarkis, Carsten Detlefs, James Ball, Can Yildirim |
On-Site Speaker (Planned) |
Marilyn Sarkis |
Abstract Scope |
Bio-cementation is a process during which calcite crystals are precipitated in the sand medium thanks to bacterial activity. These crystals will then bond the sand particles together and make the material cohesive, making this process suitable as a soil-reinforcement technique. However, the growth and the microstructure of these crystals remain unstudied to this day. This study proposed a multimodal approach in order to characterize the precipitated calcite crystals, and uses X-ray computed tomography (CT), 3D X-ray diffraction (3DXRD) as well as Dark-Field X-ray Microscopy (DFXM) on ID03 at the ESRF. Preliminary results show that the precipitated crystals are polycrystalline and grow by stacks on top of each other as the process of bio-cementation goes on. The grains also present elastic strain, that is mainly due to growth. Further investigation will include 3D strain mapping in the calcite crystals, to see the effect of the mechanical loading on the microstructure. |
Proceedings Inclusion? |
Undecided |