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Imaging of nano-seeded nucleation in cement pastes by X-ray diffraction tomography

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Published/Copyright: August 15, 2014
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 105 Issue 7

Abstract

The 3D phase distribution of cement pastes evolves during hydration and controls the rheology and mechanical properties of the paste. Synchrotron powder-diffraction micro-tomographic imaging is here employed to assess the cement phase spatial distribution in a totally non-invasive way. This technique can be used to produce distribution maps of the phases present in the hydrating cement paste. The method is applied to an ordinary Portland cement, hydrated in pure water or in the presence of nucleation seeds. The quantitative description of the phase spatial distribution by radial distribution functions allows the discrimination of different nucleation mechanisms.

Keywords: Cement; Diffraction; Nucleation; Radial distribution functions; Tomography
*Correspondence address, Dr. Luca Valentini, Department of Geosciences University of Padua, Via Gradenigo 6 I-3513 Padua, Italy, Tel: +39 049 827 9169, Fax: +39 049 827 9111, E-mail:

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Received: 2013-09-18
Accepted: 2014-01-22
Published Online: 2014-08-15
Published in Print: 2014-07-14

© 2014, Carl Hanser Verlag, München

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  3. Editorial
  4. Materials tomography is coming of age
  5. Original Contributions
  6. Microtomographic assessment of damage in P91 and E911 steels after long-term creep
  7. Imaging of nano-seeded nucleation in cement pastes by X-ray diffraction tomography
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  15. Assessing the grain structure of highly X-ray absorbing metallic alloys
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  17. People
  18. Prof. Dr. Dr. h. c. Lorenz Ratke on his 65th birthday
  19. DGM News
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https://doi.org/10.3139/146.111049
Keywords for this article
Cement; Diffraction; Nucleation; Radial distribution functions; Tomography

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Materials tomography is coming of age
  5. Original Contributions
  6. Microtomographic assessment of damage in P91 and E911 steels after long-term creep
  7. Imaging of nano-seeded nucleation in cement pastes by X-ray diffraction tomography
  8. High-speed in-situ tomography of liquid protein foams
  9. Imaging of hydrogen in steels using neutrons
  10. Characterization of multilayer structures in fiber reinforced polymer employing synchrotron and laboratory X-ray CT
  11. Ptychographic Fresnel coherent diffraction tomography at the nanoscale
  12. Materials research and non-destructive testing using neutron tomography methods
  13. The PPI value of open foams and its estimation using image analysis
  14. Combined use of micro computed tomography and histology to evaluate the regenerative capacity of bone grafting materials
  15. Assessing the grain structure of highly X-ray absorbing metallic alloys
  16. Microstructural analysis of a C/SiC ceramic based on the segmentation of X-ray phase contrast tomographic data
  17. People
  18. Prof. Dr. Dr. h. c. Lorenz Ratke on his 65th birthday
  19. DGM News
  20. DGM News
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