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mainly because of the changes in road surface
texture. As a rough guide, however, an average
temperature correction evaluated for a range of
surface textures is given in Fig. 1. From this it is
apparent that a correction for the effect of temperature
only becomes important for tests made at
temperatures below 10°C, and then its main use is to
give a more accurate assessment of the skidding
resistance which the road is likely to offer to the tyres
of vehicles, since they are likely to be running at
temperatures rather higher than that of the slider
rubber on the portable tester.
+3
+2
+1
0
-1
-2
-3
-4
-5
-6
-7
Fig. 1. Suggested temperature corrections for 'skid-
resistance' values to allow for changes in
resilience of the slider rubber
20
Test temperature(°C)
30
page 9
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