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.