Enhancing Measurement Comparability of British Pendulum Testers
Publication: International Conference on Road and Airfield Pavement Technology 2023
ABSTRACT
The British pendulum test (BPT) is used worldwide for field and laboratory testing of pavement skid resistance. Due to its widespread use by engineers in many countries and agencies, it is important to ensure that the BPT measurements, reported as British pendulum number (BPN), made by different parties using different units of BPT device can be compared directly. The traditional method only considers adjusting the calibration results of a single BPT device within the limits allowed by the standard to ensure the accuracy for BPT measurements. There is a lack of consideration for the comparability of measurements between different BPT devices with different operating parameter values. To overcome this problem, two new indicators obtained through conversion procedures for BPT measurements are proposed in this paper, namely the theoretical coefficient of friction and the virtual BPN corresponding to the preset standard operating parameter values. First, the common basis for both two approaches is to establish a finite element simulation model of the BPT test process. Then, by means of computer simulation analysis of the skid resistance test processes of different BPT units, the proposed procedure is able to convert BPT measurements by different BPT units to two new indicators. Four BPT units from different laboratory and four specimens including different combinations of macro and micro textures were used to verify the two proposed procedures. The practical results show that the two new indicators obtained by both conversion procedures can reduce the fluctuation of BPT measurements to enhance the comparability between different BPT devices. The proposed procedure can be applied to measurements by any BPT unit without any changes to the current BPT calibration facility and process.
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REFERENCES
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Published In
International Conference on Road and Airfield Pavement Technology 2023
Pages: 421 - 428
History
Published online: Feb 6, 2024
ASCE Technical Topics:
- Calibration
- Design (by type)
- Engineering fundamentals
- Field tests
- Finite element method
- Highway and road design
- Infrastructure
- Laboratory tests
- Load and resistance factor design
- Load factors
- Mathematics
- Measurement (by type)
- Methodology (by type)
- Numerical methods
- Parameters (statistics)
- Pavements
- Skid resistance
- Statistics
- Structural design
- Tests (by type)
- Transportation engineering
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