CPX trailer comparison Round robin test data analysis

  • Productgroep:Download / Rapport
  • Soort:Gratis uitgave
  • Vakgebied(en):Infrastructuur
  • Datum uitgifte:31 mei 2012
  • Druk:1
  • Artikelnummer:D12-02
Prijs per stuk: Gratis

This report presents the results of the CPX-comparison test of 2011 and the findings from the analyses and investigations.

De CPX-meetmethode is een praktisch hulpmiddel voor het vaststellen van de akoestische kwaliteit van wegdekken. Dit Engelstalige rapport laat de resultaten zien van het in 2011 gehouden ringonderzoek.

Downloads:
D12-02a Additional guidelines
D12-02b Aanvullende richtlijnen
Summary
Samenvatting
Introduction
1 Experimental plan of the comparison test
1.1 General principles of the experimental plan
1.2 Description of the participating trailers / operators
1.2.1 DGMR / Reubsaet - NL
1.2.2 Danish Road Institute (DRI) – Denmark
1.2.3 M+P - NL
1.2.4 Bundesanstalt für Straβenwesen (BASt) – Germany
1.2.5 Vlaamse overheid (Flemish government) – Belgium
1.2.6 Province Noord-Brabant – Bureau Milieumetingen – NL
1.3 Measured road sections
1.4 Tyres used for the comparison test
1.5 Measurement schedule
1.6 Details of the test procedure
1.6.1 Test speed
1.6.2 Temperature measurements
1.7 Registration of location and length of the tested road segments
2 Test results
2.1 Results of CPX measurements
2.2 Comparison of acoustic calibration sound sources
2.3 Shore-hardness of test tyres
2.4 Tyre pressure of test tyres
2.5 Certification data of the CPX trailers
3 Statistical analysis of test results
3.1 Preparation of delivered test data
3.2 Analysis of average CPX values per test section – see annex II
3.3 Standard deviation of 100 m segments within a test section – see Annex II
3.4 Analysis of average values per test tyre – see annex III
4 Acoustical interpretation of analysis results
4.1 Average CPX values per test section – see annex II
4.1.1 Section 1: 2-layer porous asphalt concrete – 2/6 mm
4.1.2 Section 2: porous asphalt concrete – 2/16 mm
4.1.3 Section 3: Low energy porous asphalt concrete – 2/16 m
4.1.4 Section 4: stone mastic asphalt – 0/11 mm
4.1.5 Section 5: dense asphalt concrete – 0/16 mm
4.2 Standard deviation of 100 m segments within a test section – see Annex II
4.3 Average CPX values per tyre type – see annex III
4.3.1 SRTT reference circulation tyre set – 80 km/h
4.3.2 SRTT tyres – 50 km/h
4.3.3 SRTT tyres – 80 km/h
4.3.4 Avon AV 4 tyres – 50 km/h
4.3.5 Avon AV 4 tyres – 80 km/h
4.4 Spectral analysis of the average CPX levels per test section – see Annex IV
5 Acoustically relevant findings and conclusions
5.1 Differences between trailers
5.2 Differences between left and right mounted tyres
5.3 Overall average values of standard deviations per test tyre type
5.3.1 Single tyre measurements(left or right)
5.3.2 Average results of left and right tyres
5.4 General observations
6 Recommendations
6.1 Recommendations for reduction of measurement uncertainty of CPX tests
6.2 Recommendations for future CPX comparison tests
References
Annex I Map of the road sections in the test circuit
Annex II Analysis of test data per test section
Annex III Analysis of test data per tyre type
Annex IV Spectral presentation of test data per test section and per tyre type