Pore Structure Characterisation by Magnetic Resonance Techniques

Date This project started on 01 September 2004 and ended on 01 December 2006

Status This project is Finished

Authors
Ecole Polytechnique, FR
University of Surrey, UK
Objectives

Proton NMR is a powerful technique to study the state of water in porous structures and in modelling porous microstructures over many ranges of length scales. Basically we aim at studying the early-age hydration phases of various new cement-based materials using different techniques of proton nuclear relaxation of water.

The main interest of using such non invasive and non destructive techniques is to obtain in situ information on the microdynamics of water precisely at the solid-liquid interfaces. One thus probes continuously the surface area and the pore size distribution in the size range 2-50 nm. We believe that the information obtained on the nanoscale porosity will be of primary importance to improve the long-term performance of the cementitious materials.

The objective of this project was specifically to refine a comprehensive set of state-of-the-art non-destructive, non-invasive instrumental techniques capable of fully-analysing the pore structure of hydrated cements, the degree of filling of the pores with water, and the mobility of water in the (partially saturated) material.

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