CCC 2018 Proceedings of the Creative Construction Conference (2018) Edited by: Miroslaw J. Skibniewski & Miklos Hajdu DOI 10.3311/CCC2018-032 Corresponding author: Elżbieta Horszczaruk email: elzbieta.horszczaruk@zut.edu.pl Creative Construction Conference 2018, CCC 2018, 30 June - 3 July 2018, Ljubljana, Slovenia Use of a 3D scanner for imaging concrete sample surfaces abraded with the ASTM C 1138 method Elżbieta Horszczaruk a, *, Piotr Brzozowski a a West Pomeranian University of Technology Szczecin, Department of Civil Engineering and Architecture, Al. Piastow 50, 70-311 Szczecin, Poland Abstract In the case of most concrete constructions, aggression caused by abrasion is not the basic type of destructive environmental impact. However, in the case of certain structures, such as hydraulic constructions, it is indeed a basic impact. In addition to corrosion, the largest proportion in the general destruction of concrete hydro structures is made up by erosion from debris, wind and ice. In tests of abrasive wear on concrete, the so-called underwater method, which is described in detail in the American Standard ASTM C 1138. The abrasive wear of a concrete sample is the result of the surface impact of test steel beads placed in water and set in motion by means of a stirrer. The result of the test is the average sample area consumption, calculated using the weight loss of the concrete sample during the test. However, this method does not allow for an accurate display of the sample surface. There is no possibility of determining the size of the maximum wear of depth. In surface imaging tests of concrete samples subjected to abrasion, in the device using the ASTM C 1138 method, an Atom Triple Scan GOM optical scanner was installed on an industrial robot with an integrated rotary table. Thanks to the use of a 3D scanner, it was possible to compile a map of the concrete sample surfaces. The scanner software allowed cross profiles to be made at any place in the samples tested. Thanks to the exact depiction of the abraded concrete surfaces used, it is possible to properly assess the concrete used in hydraulic constructions and as a repair material. © 2018 The Authors. Published by Diamond Congress Ltd., Budapest University of Technology and Economics Peer-review under responsibility of the scientific committee of the Creative Construction Conference 2018. Keywords: abrasion resistance; 3D scanner; surface damage; hydrotechnical construction; underwater method 1. Introduction Besides static and dynamic loads, engineering objects and structures are exposed to environmental actions, which can have significant effects on theirdurability and safety in use. The intensity of these direct actions is the basis for categorization of the environment, taking into consideration, among others: the results of cyclic freezing and thawing of the concrete, the influence of carbon dioxide, the action of the sodium chloride used for de-icing or contained in sea water, as well as the chemical corrosion of concrete, which leads to the destruction of the cover of the reinforcing steel; and abrasive wearing of the surfaces of concrete elements and structures. Hydrotechnical concrete structures are exposed to, among other things, the erosive action of the environment caused by solid particles transported by water (water erosion) and air (wind erosion). The concrete for making hydrotechnical structures, besides having the specified compressive strength, should also have the highest possible wear resistance. Abrasive wearing caused by river or sea debris, transported by water, is different from the abrasion of road pavements or airfield plates [1]. 240