1. CONCRETE INDUSTRY AND ABRASIVE WEAR

2. The concrete industry

4. ABRASIVE WEAR MECHANISMS Two body abrasion Three body abrasion

5. PIN ON DISC WEAR MACHINE Hardness, HV Quenched & temperered Weigth loss, mg Rst52.3 Dx460MC Dx550MC Dx600MC Dx650MC

6. PADDEL WEAR MACHINE Weigth loss, mg Rst52.3 Dx460MC Dx550MC Dx690MC Dx650MC Quenched & Tempered Hardness, HV

8. CONCRETE TRANSPORT IN PIPE

9. CONCRETE MOVEMENT IN DRUM

10. ACTIVE LAYER AND HARDNESS

11. 200 3.0 600800400 2.0 1.0 Perlitic steels Martensitic steels Bainitic steels (Austempered) Austenitic steels Vickers hardness (HV) Relative Wear Resistance (pure iron = 1) Increasing Alloy Content Cold Work Increasing C-content Effect of Microstructure and Composition on Wear

13. Wear during gravel transport Q & T 150 HV 250 HV 290 HV400 HV Loss of volumen Rst52.3Dx700

14. WeldHAZ 0.2 mm Formability Weldability OTHER IMPORTANT PROPERTIES