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BS EN 12697-49:2022

BS EN 12697-49:2022

$142.49

Bituminous mixtures. Test methods – Determination of friction after polishing

Published By Publication Date Number of Pages
BSI 2022 32
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This document specifies a method to determine the friction at 60 km/h after polishing during a fixed number of passes on surfaces of bituminous mixtures samples, or to follow its evolution as a function of the number of polishing passes. The samples used are either produced in a laboratory or are cores taken from the site.

PDF Catalog

PDF Pages PDF Title
2 National foreword
5 European foreword
7 Introduction
9 1 Scope
2 Normative references
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
3.2 Symbols and abbreviated terms
10 4 Principle
5 Equipment
5.1 Test device
5.1.1 General
5.1.2 Polishing unit
13 5.1.3 Specimen clamping system
5.1.4 Measuring unit
15 5.2 Control plate for comparative measurements
5.3 Sand-blasting-equipment
6 Other materials
6.1 Quartz powder
16 6.2 Water quartz powder mixture
6.3 Corundum
7 Test method
7.1 Preparation of the specimens
7.1.1 General
7.1.2 Specimens prepared in the laboratory
17 7.1.3 Specimens taken from the site
7.1.4 Conditioning of specimens
7.2 Polishing procedure
7.2.1 General
7.2.2 Pre-test check of the polishing unit
7.2.3 Polishing process
18 7.3 Friction measurement
7.3.1 Pre-test check of the measurement device
7.3.2 Friction test
19 8 Calculation and expression of the results
8.1 Friction result μ FAP on a single specimen
8.2 Determination of FAP
9 Test report
20 10 Precision
21 Annex A (informative) Example of polishing head and friction unit
22 Annex B (informative) Results obtained from the curve FAP against passes
23 Annex C (informative) National experiences
30 Bibliography

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BS EN 12697-49:2022
$142.49