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Micropore size analysis by NMR in hydrated cement
A Plassais1, M-P Pomiès, N Lequeux
1Laboratoire Céramiques et Matériaux Minéraux, UMR 7574, Ecole Supérieure de Physique et de Chimie Industrielles, 75231 Paris 05, France. arnaud.plassais@espci.fr
Magnetic Resonance Imaging
|July 10, 2003
Summary
Investigating cement microstructure using proton nuclear magnetic relaxation (1H-NMR) revealed its setting process. This technique helps understand the evolving micropore size distribution during cement hydration.
Area of Science:
- Materials Science
- Chemistry
- Physics
Background:
- The microstructure of cement and its setting process are not fully understood.
- Characterizing the evolving microstructure during cement hydration is crucial for material science.
Purpose of the Study:
- To investigate the micropore size distribution of hydrated C3S paste during setting.
- To elucidate the progressive structuration of cementitious materials.
Main Methods:
- Proton nuclear magnetic relaxation (1H-NMR) spectroscopy.
- Field-cycling relaxation measurements.
- Analysis of spectral and dispersion curves.
Main Results:
- Non-exponential decay in relaxation data was observed.
- This decay was interpreted as a distribution of discrete relaxation rates.
- T1 attribution was confirmed through spectral and dispersion curve analyses.
Conclusions:
- 1H-NMR and field-cycling relaxation are effective for studying cement microstructure.
- These methods allow for tracking the material's structuration during the setting process.