Arregui-Mena, Jose. Investigation of the irradiation induced porosity in concrete aggregates with x-ray computed tomography and helium pycnometry

Principal Investigator
First Name:
Jose
Last Name:
Arregui-Mena
Institution:
Oak Ridge National Laboratory
Title:
Dr
Team Members:
Name: Institution: Expertise: Status:
Thomas Rosseel Oak Ridge National Laboratory Material Characterization, Irradiated Concrete Other
Elena Tajuelo Rodriguez Oak Ridge National Laboratory TEM, Nanoindentation, Cement, Concrete, Nuclear Magnetic Resonance, Gamma Irradiation Other
Philip Edmondson Oak Ridge National Laboratory Nuclear Materials, APT Other
Ercan Cakmak Oak Ridge National Laboratory Expert on x-ray computed tomography Other
Ippei Maruyama Nagoya University Dr Maruyama is a world renowned scientists on neutron irradiation effects of concrete Faculty
Experiment Details:
Experiment Title:
Investigation of the irradiation induced porosity in concrete aggregates with x-ray computed tomography and helium pycnometry
Describe the work that you are proposing in detail. Please include as many specifics as possible (e.g., dose, dose rate, ion energy, types of ions, beam line x-ray energy, irradiation temperature, analysis temperature, atmosphere, etc.):
A total of 10 samples will be scanned with XCT. A total of 10 samples will be scanned to compare the effects of different compositions. Specimen type Sample ID Mineral composition Neutron fluence (n/cm2) (E>0.1 MeV) Irradiation temperature (C°) GA GA-NR 91.8% Quartz, 3.03% Microcline, 2.3% Anorthite - - GA-I 3.5×1020 53.3 GB GB-NR 47.13% Quartz, 23.59% Albite, 10.06% Sericite - - GB-1 3.5×1020 53.3 GC GC-NR 39.71% Quartz, 29.6% Albite, 8.73% Microcline - - GC-I 3.5×1020 53.3 GE GE-NR 23.53% Quartz, 34.31% Albite, 12.79% Sericite - - GE-I 3.5×1020 53.3 GF GF-NR 91.1% Calcite, 8.1% Amorphous - - GE-I 3.5×1020 53.3
Technical Abstract
In the present project, X-ray Computed Tomography (XCT) will be used to characterize the pore morphology of as-received and neutron irradiated samples of concrete aggregates. This technique will be used to compare the pore content and structure of unirradiated and irradiated concrete aggregates creating 3D models from the XCT data with the Avizo Fire software. Pore content, orientation, connectivity and size will be measured at different irradiation conditions and mineral compositions. This analysis will allow to understand the microstructural changes produced by neutron irradiation and in different types of aggregate minerals. In addition to this, helium pycnometry measurements will help to validate the XCT results. To further understand the influence of irradiation in concrete aggregates, simulations of the software Microstructural-Oriented Scientific Analysis of Irradiated Concrete (MOSAIC) will be used to measure the mechanical response and stress concentrations of the corresponding sample.