On the colouring of sand grains
On the colouring of sand grains
In physical modelling, it is beneficial for tracking of soil movement, like image processing, when the tested soil shows contrast in colour. When a sand does not have sufficient contrast or when displacements in a certain area are of special interest, artificially colouring of sand particles may provide an outcome. However, colouring sand also involves some challenges. When working with water saturated sand, the colour should be water resistance. Besides this, also the interaction between the grains (friction angle and cohesion) and the water permeability of the sand matrix should not be affected by the painting. In this paper a method for colouring sand particles with limited effects of the paint on the sand behaviour is presented. Finally, some examples in which coloured sand has been applied are given to illustrate its added value.
Dirk A. De Lange; John Langstraat
5th European Conference on Physical Modelling in Geotechnics (ECPMG2024)
New facilities, new equipment, measuring techniques
https://doi.org/10.53243/ECPMG2024-85
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