Characterization of micro-pore structure in novel cement matrices

Seyoon Yoon, Isabel Galan, Kemal Celik, Fredrik P. Glasser, Mohammed S. Imbabi

Research output: Contribution to journalArticle

Abstract

Calcium sulfoaluminate (CSA) cements are being developed using a novel processing method having as its objective lowering specific CO2 emissions by ∼50% relative to a Portland cement benchmark. We need to be able to measure the properties of the products. Porosity and permeability measurements help define the engineering properties but their quantification is influenced by the choice of experimental protocols. In the present study we used ordinary Portland cement (PC) paste as a benchmark and hydrated ye'elimite, which is a main component of CSA cements, to understand its pore structure. We report on the use of synchrotron-sourced radiation for μCT (Computerized Tomography) and 3D image re-construction of the internal micro-pore structure of PC and ye'elimite-gypsum pastes. As a comparison, porosity and permeability measurements were traditionally obtained using Mercury Intrusion Porosimetry (MIP). The Mori-Tanaka method and the polynomial statistical model were used to analyze the effects of different 3-D micro-pore structures on mechanical properties. The results show that e micro-pore structures differ considerably between PC and ye'elimite pastes and their bulk modulus is significantly affected by the shapes of their micro-pore structures.

Original languageEnglish
Article number908
JournalMaterials Research Society Symposium Proceedings
Volume1712
DOIs
Publication statusPublished - 1 Jan 2014

Keywords

  • ceramic
  • porosimetry
  • x-ray tomography

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering
  • Mechanics of Materials

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