Surface Topographical Characterization of Concrete Protected by Coal Tar Using 3D Profilometry

Abstract:

The results obtained for the characterization of the surface texture of concrete protected by coal tar using a 3D-topographical approach are presented here. The concrete, which presents a low waterbinder ratio, high compressive strength, and high impermeability, has been subjected to an aggressive acidic environment by immersion in 2.5%H₂SO₄. The profilometry technique, which produces 3D-topographical images and amplitude parameters, is used to compare the coated and uncoated surface textures before and after chemical attack, to evaluate the degradation of concrete, and the minimization of such effect in the coated concrete. The degradation and the minimization of degradation can be confirmed by the variation in all the parameters studied. This research, based on studies of profilometric analyses, demonstrates the accuracy, precision and efficiency of this technique in analyzing the concrete surface, indicating that it can be broadly employed in concrete durability research. The methodology adopted demonstrates that the application of coal tar as a protective coating for concrete in an aggressive environment minimizes its surface degradation and increases its durability.

• Periodical: Key Engineering Materials (Volume 600)
• Pages: 576-582
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.600.576
• Online since: March 2014
• Authors: Carmen Couto Ribeiro, Joana Darc da Silva Pinto, Cristina Durães de Godoy, Paula Bamberg, Tadeu Starling
• Keywords: Coal Tar, Concrete, Durability, Profilometry

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