Resistance to abrasion by studded tires is determined according to EN 13108-20, Clause D.4, and testing after EN 12697-16, Procedure A. The available categories of requirements are AbrA20, AbrA24, AbrA28, AbrA32, AbrA36, AbrA40, AbrA45, AbrA50, AbrA55, AbrA60, and AbrNR, where AbrNR means no requirement.
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TABLE 14.1 Test Methods of SMA Resistance to Permanent Deformation and Test parameters
Source: Modified from EN 13108-20. Bituminous Mixtures—Material Specifications— Part 20: Type Testing Table D.1 of Clause D.6. a 1 cycle = 2 passes of wheel. |
• Table 13—for results from the small device; Procedure B, testing in air, categorizes the following requirements marked with the symbol WTSAIR as the maximum wheel tracking slope (mm/1000 load cycles): WTSAIR 0.03, WTSAIR 0.05, WTSAIR 0.07, WTSAIR 0.10, WTSAIR 0.15, WTSAIR 0.30, WTSAIR 0.40, WTSAIR 0.50, WTSAIR 0.60, WTSAIR 0.80, WTSAIR 1.00, and WTSAIR NR, where WTSAIR NR means no requirement.
• Table 14—for results from the small device; Procedure B, testing in air, categorizes the following requirements marked with the symbol PRDAIR as the maximum proportional rut depth (percent of slab’s thickness): PRDair 1.0, PRDaiR 1.5, PRDaiR 2.0, PRDaiR 3.0, PRDaiR 4.0, PRDaiR 5.0, and PRDaiR NR, where PRDaiR means no requirement.
