A 3D Study Of Mortar Degradation By X-ray
Computed Microtomography
Author(s)
D. Bernard, D. chen & N. Burlion
Abstract
Prediction of long term performance and durability of concrete is an essential
issue for many practical problems. In various situations, the cement paste is
attacked by dissolved elements present in the water surrounding the structure and
more or less deeply penetrating it.
In this work the consequences of leaching, accelerated by ammonium nitrate, on
samples of a standard mortar have been characterised in 3D by X-ray computed
microtomography (XCMT). This non-destructive method provides quantitative
3D maps of the sample's X-ray absorption coefficient p. At each voxel (cubic
volume element composing the 3D map), the value of p is the average of the
absorption coefficients of the different solids and fluids contained into it at the
moment of acquisition.
Comidered samples are cylinders of 8 mm in diameter a
Keywords
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