Multi-scale approach continuously relating the microstructure and the macroscopic mechanical properties of plaster pastes during their settings

Article Abstract:

A new multi-scale experimental approach is proposed to continuously relate the microstructure and the macroscopic mechanical properties of plaster pastes during their settings. [1.sup.H] Nuclear Magnetic Resonance relaxometry were used to carry out a nondestructive characterization of the plaster hydration and a noninvasive determination of the resulting microstructure, leading to the conclusion that a quantitative determination of the degree of hydration of plaster paste is determined continuously during the hydration from the water consumption, complementary to the traditional calorimetric measurements.

Concrete, Gypsum, Plaster, Nonmetallic Mineral Product Manufacturing, Concrete, Gypsum, and Plaster Products, Plaster, Observations, Mechanical properties, Hydration (Chemistry)

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Probing microstructure evolution during the hardening of gypsum by proton NMR relaxometry

Article Abstract:

A comprehensive proton NMR relaxation study of the water confined in the evolving porous structure of hardening gypsum prepared with different water-to-plaster ratios (wlp) and increasing addition of crushed gypsum was reported. The findings suggested that both the method and the theory presented could be applied more widely to other porous media with reactive surface areas.

Science & research, Research, Protons

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Pore morphology of porous polymer particles probed by NMR relaxometry and NMR cryoporometry

Article Abstract:

The study of pore size distribution (PSD) and pore connectivity (PC) within porous polymer particles probed by combining NMR cryoporometry and NMR relaxometry is conducted. A detailed analysis of the complete set of NMR data enabled the morphology or pore structured to be probed and is thoroughly discussed.

Analysis, Porous materials, Gibbs' equation, Chemical properties, Relaxation (Nuclear physics)

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