Characterization of microstructure evolution of cement paste by micro computed tomography

Yong Jia He, Jason Mote, David A. Lange

Research output: Contribution to journalArticle

Abstract

Micro computed tomography (Micro-CT) was applied to obtain three-dimensional images of the microstructure of cement paste (water-to-cement mass ratio of 0.5) at different ages. By using the Amira software, component phases of the cement paste such as pores, hydration products, and unhydrated clinker particles were segmented from each other based on their 3D image grey levels; their relative contents were also calculated with the software, and the data are 61.2%, 0% and 38.8% at the beginning of hydration and 11.8%, 78.5% and 9.7% at 28 d age, respectively. The hydration degree of cement paste at different ages was compared with the experimental data acquired by loss on ignition (LOI) tests. The results show that the calculated and measured data reasonably agree with each other, which indicates that micro-CT is a useful and reliable approach to characterize the micro structure evolution of hydrating cement paste.

Original languageEnglish (US)
Pages (from-to)1115-1121
Number of pages7
JournalJournal of Central South University
Volume20
Issue number4
DOIs
StatePublished - Apr 1 2013

Keywords

  • 3D image
  • Micro computed tomography (Micro-CT)
  • cement paste
  • microstructure

ASJC Scopus subject areas

  • Engineering(all)
  • Metals and Alloys

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