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Related Experiment Videos

Micropore size analysis in hydrated cement paste by NMR.

A Plassais1, M P Pomiès, N Lequeux

  • 1Laboratoire Céramiques et Matériaux Minéraux, UMR 7574 du CNRS, Ecole Supérieure de Physique et de Chimie Industrielles, 10 rue Vauquelin, 75005, Paris, France. Arnaud.plassais@espci.fr

Magnetic Resonance Imaging
|July 11, 2001
PubMed
Summary

We tracked proton relaxation rates in cement paste to monitor its hydration and pore structure changes. This reveals key stages of cement development and material surface evolution.

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Area of Science:

  • Materials Science
  • Physical Chemistry
  • Chemical Engineering

Background:

  • Understanding cement hydration is crucial for construction materials.
  • Characterizing cement microporosity evolution is key to predicting material properties.

Purpose of the Study:

  • To investigate the time evolution of proton spin-lattice relaxation rates in synthetic cement paste.
  • To correlate relaxation rate changes with cement hydration stages and microporosity refinement.

Main Methods:

  • Measurement of spin-lattice relaxation rates in the laboratory frame (1/T(1)).
  • Measurement of spin-lattice relaxation rates in the rotating frame (1/T(1rho)).

Main Results:

  • Observed distinct changes in 1/T(1) and 1/T(1rho) corresponding to cement hydration.

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  • Demonstrated the refinement of cement paste microporosity over time.
  • Provided evidence for the texturation of porosity and structuration of the material surface.

    • Conclusions:

    • Proton relaxation rates serve as effective probes for monitoring cement hydration.
    • The study highlights the capability of NMR relaxation techniques in characterizing cement microstructural development.