Abstract
A range of advanced imaging techniques have been brought together to provide a comprehensive picture of cement microstructure for nuclear waste immobilization. Image analysis of Nirex Reference Vault Backfill (NRVB) has been used to characterize the Calcium-Silicate-Hydrate (C-S-H) matrix fraction. Through weight loss measurements and digital image correlation of OPC-based cement blends we have quantified the development of microstructure surface strains during the initial 48 hrs hardening period. The build-up of displacements on the microstructure scale indicated grain-like compressive areas, surrounded by a network of tensile regions. Serial sectioning of NRVB using ultra-microtome cutting has been explored for advanced high-resolution 3D microstructure characterization, while X-ray Computed Tomography (XCT) has been used to obtain information of the 3-D pore space and size distribution of air pores in NRVB non-destructively. © 2012 Materials Research Society.
Original language | English |
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Title of host publication | Materials Research Society Symposium Proceedings|Mater Res Soc Symp Proc |
Publisher | Cambridge University Press |
Pages | 521-526 |
Number of pages | 5 |
Volume | 1475 |
ISBN (Print) | 9781605114521 |
DOIs | |
Publication status | Published - 2012 |
Event | 2012 MRS Spring Meeting - San Francisco, CA Duration: 1 Jul 2012 → … |
Conference
Conference | 2012 MRS Spring Meeting |
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City | San Francisco, CA |
Period | 1/07/12 → … |