Characterization of cement microstructure for the immobilization of nuclear waste using advanced imaging methods

D. L. Engelberg, J. A. Duff, L. Murray, L. Dodds, N. Mobasher, P. J. Withers

    Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

    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 languageEnglish
    Title of host publicationMaterials Research Society Symposium Proceedings|Mater Res Soc Symp Proc
    PublisherCambridge University Press
    Pages521-526
    Number of pages5
    Volume1475
    ISBN (Print)9781605114521
    DOIs
    Publication statusPublished - 2012
    Event2012 MRS Spring Meeting - San Francisco, CA
    Duration: 1 Jul 2012 → …

    Conference

    Conference2012 MRS Spring Meeting
    CitySan Francisco, CA
    Period1/07/12 → …

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