Multi-layer cement materials

In many cases not only high spatial resolution but also a large penetration depth is desired. It can be achieved with the PM10, which provides a penetration depth of 10 mm. This version of the profile NMR-MOUSE generates a sensitive volume where is B0 = 0.25 T, and G0 = 11.1 T/m.

An application of these mobile sensor for large depth measurements is the study of multi-layer polymer coatings on concrete samples. Such coatings are used to protect concrete from degradation and corrosion. They are applied to the concrete surface to reduce the porosity in the upper first millimeters to prevent the penetration of water and decrease the rise of subsoil-water by capillarity forces. The figure on the right shows a profile of a sample that consists of four layers of epoxy plus sand, polyurethane (PUR) plus sand, elastic polyurethane, and epoxy.  The application of this technique to systematically study the effect of the layers to the attack of different substances will be helpful to improve the quality of the material and to detect in situ the conservation state of buildings.

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