BS EN 12697-49:2014
$102.76
Bituminous mixtures. Test methods for hot mix asphalt – Determination of friction after polishing
| Published By | Publication Date | Number of Pages |
| BSI | 2014 | 22 |
This European Standard describes a test method to determine the friction at 60 km/h after polishing during a fixed number of passes on surfaces of bituminous mixtures samples. The samples used are either produced in a laboratory or are cores taken from the site. NOTE This procedure was previously known as Wehner and Schulze method (see [1]).
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 5 | Foreword |
| 8 | 1 Scope 2 Normative references 3 Terms, definitions and symbols 3.1 Terms and definitions 3.2 Symbols |
| 9 | 4 Principle 5 Equipment 5.1 Test device 5.1.1 General 5.1.2 Polishing unit 5.1.2.1 General 5.1.2.2 Polishing head |
| 10 | Figure 1 — Polishing head (view from below) 5.1.2.3 Polishing rollers |
| 11 | Figure 2 — Polishing rollers — 3D view, cross and longitudinal section |
| 12 | 5.1.2.4 Water-quartz-powder mixture projection device 5.1.3 Specimen clamping system 5.1.4 Friction measuring unit 5.1.4.1 General 5.1.4.2 Rotating head Figure 3 — Measuring head (view from below) |
| 13 | 5.1.4.3 Moment measuring system 5.1.4.4 Rotation speed measurement system 5.1.4.5 Sliding blocks for friction measuring Table 1 — Properties of the rubber of a sliding block |
| 14 | Figure 4 — Shape of the rubber, Sliding block (plan view and cross section) 5.1.4.6 5.1.4.6 Water projection system 5.2 Glass-control plate 5.3 Sand-blasting-equipment 6 Other materials 6.1 Quartz powder |
| 15 | 6.2 Water quartz powder mixture 6.3 Corundum Table 2 — Grading requirements for corundum 7 Test method 7.1 Preparation of the specimens 7.1.1 Specimens prepared in the laboratory 7.1.2 Specimens taken from the site |
| 16 | 7.2 Polishing procedure 7.3 Friction measurement 7.3.1 Pre-test check of the measurement device |
| 17 | 7.3.2 Friction test 8 Calculation and expression of the results 8.1 Friction force and friction coefficient 8.2 Determination of FAP |
| 18 | 9 Test report 10 Precision Table 3 — Precision data on bituminous mixtures |
| 19 | Annex A (informative) Example of polishing head and friction unit Figure A.1 — Example of polishing head and skid resistance measuring device (Wehner and Schulze machine) |
| 20 | Bibliography |
