appearance.
In an abrasion-resistant material, such as Serena stone, which apparently does not show any alteration of the surface visible to the naked eye, an increase in roughness is observed microscopically which increases the surface absorption.
This new technique is applicable as an alternative and/or in addition to optical color measurements during laboratory tests and complementary to investigations such as SEM (Schroettner et al. 2006).
274As a future perspective of the research, the possibility of creating an algorithm for the evaluation of surface porosity variations is being evaluated by comparing the data obtained with Alicona, mercury porosiment and micro-CT.
References
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ASTM E1857−97 (Reapproved 2013) Standard Guide forSelection of Cleaning Techniques for Masonry, Concrete, and Stucco Surfaces.
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