Proficiency Test on Bitumen finished
The full report can be downloaded (as .pdf-file). To download the report, please click the right mouse button and choose the "save as" option. Download the report (iis14F02) of the Proficiency Test on Bitumen.
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Summary of this proficiency test: On 31 March 2015, the proficiency test on Bitumen (iis14F02) was finished. The PT started 19 November 2014(see message “Proficiency Test on Bitumen started” on this website) when the samples were distributed. In this interlaboratory study 35 participants in 21 different countries have participated.
The participants were requested to determine Density at 25°C
Dynamic Shear Rheometer
Dynamic Viscosity at 60°C
Flash Point, COC
Fraass breaking point
Kinematic Viscosity at 135°C
Penetration at 25°C
Penetration Index
RTFOT at 163°C
Softening Point (Ring&Ball)
Solubility in Xylene The proficiency test report summarises per test, the
test results, the analytical methods reported by the participants and the
z-scores calculated for each participant are tabulated. Also, for
each test, the calculated summary (e.g. mean, standard deviation and
reproducibility) is given. In the report also an evaluation of the test results is
given. Problems encountered in the analyses are mentioned and - where
possible - suggestions for quality improvement are formulated. For each test
a comparison is made between the results of the group of participants and
the requirements given by the relevant standard (e.g. ISO, ASTM, EN).
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