Abrasive and adhesive wear behaviour of metallic bonds in a synthetic slurry test for wear prediction in reinforced concrete

Abstract

The understanding of the tribological system and the corresponding wear behaviour of metallic materials is, especially in wet condition and in presence of abrasive particles, of high importance. This particularly applies for construction applications, like core drilling and sawing in reinforced concrete, where the knowledge about adhesive wear but also abrasive micro- and macro-mechanisms is limited. If it comes to material removal in reinforced concrete, adhesive wear between the metal matrix and the reinforcement steel is observed, besides abrasive wear as a result of the metal matrix–concrete interaction. To differentiate adhesive and abrasive wear, a new approach for testing metal materials with varying counter parts and different sliding speeds in a wet-slurry test is presented. A for this work modified B611 - 13 test is used to test two different metal compositions to investigate their change in mass, micro-hardness and the microstructure at the sliding interface zone. Additionally, the wear pattern is identified by optical microscope and under the scanning electron microscope. To differentiate the main wear mechanisms, a S355 steel and a silicon carbide ceramic are used as a counterbody. The results show that it is possible to separate the wear behaviour while testing in different conditions.