Studies on Tire Wear. I. Correlation between Laboratory Abrasion Tests and Road Tests

The correlation between laboratory abrasion tests and road tests were studied and the following results were obtained for SBR and BR tread compounds. 1. The Akron, the Pico and the Williams abrasion test results correlate well with the road test results, especially the Pico abrasion test results, even when formulations and polymers are varied. 2. In Williams abrasion tests, the differences among compounds are much more magnified than in the case of the road tests and they are less magnified in the order of Akron > Pico. These differences might be ascribed to the different severity of each abrasion machine according to Gelinas??? theory. The severity of each abrasion test decreases in the following order: Williams abrasion ≪ Akron abrasion > Pico abrasion The severity of Pico abrasion most approaches that of road tests. 3. The Akron and the Pico abrasion test results on aged samples are well correlated with the road test results as in case of the test results on samples before aged. The differences among compounds are smaller in case of the laboratory test results on aged samples than in case of the results on samples before aging, and approach those of the road test results.