This European Standard specifies a method for the determination of the softening point of bitumen and
bituminous binders in the range of 28 °C to 150 °C.
Technical warning - The change from mercury thermometers to electronic temperature devices has
revealed that the temperature definition in the mercury thermometer has not been precise enough to
make a correct, unbiased transfer to electronic devices. Care should be taken for softening points ring
and ball above 100 °C as the condition may have changed from previous practise to present days
testing equipment. Below approx. 100 °C the difference in temperature readings between electronic
and mercury stem thermometer is acceptable compared to the repeatability of this test methods.
[Reference: ASTM E20 Group]
NOTE The method described is also applicable to bituminous binders that have been recovered from bituminous
mixes, e.g. by extraction.
WARNING — Use of this European Standard can involve hazardous materials, operations and
equipment. This European Standard does not purport to address all of the safety problems associated
with its use. It is the responsibility of the user of this European Standard to establish appropriate
safety and health practices and determine the applicability of regulatory limitations prior to use.