Title: Prediction of Hemp Concrete Morphological Deformation by X-ray Tomography

Author(s): Kamilia Abahri, Chady El Hachem, Fares Bennai, Ngoc Toan, and Rafik Belarbi

Publication: Symposium Paper

Volume: 320

Issue:

Appears on pages(s): 50.1-50.10

Keywords: hemp concrete; X-ray tomography; porosity; 3D microstructure; hygroscopicity

DOI: 10.14359/51701088

Date: 8/1/2017

Abstract:
This study presents experimental and 3D correlation results of the microstructural hygrothermal behavior of hemp concrete. The experimental procedure was performed using non-destructive method’s X-ray tomography and digital microscopy. Hemp concrete specimens were scanned and examined at different relative humidity levels through a specifically developed processing protocol. The material response to temperature in the range of 25°C to 110°C where also analyzed via the 3D topology post-processing. After that, 3D correlation is performed on the reconstructed volumes, with fined resolution of 17μm/voxel, in order to quantify the various displacements due to the hygric load. The imaging data and the 3D correlation results allowed having access to the displacement field caused by the relative humidity and temperature solicitations on real structure of hemp concrete. These results provide reliable data on the microstructural evolution when studying aging or the material durability.