STUDDED TYRE TEST - PRECISION TRIALS

In the Nordic countries most cars are equipped with studded tyres during the winter. The studs increase the wear on the road surfaces and a special test method has been developed to measure the aggregates' resistance towards fragmentation by studded tyres. The method has proven to correlate very well with the actual wear on the road surfaces. The Nordic countries Sweden, Norway and Finland have agreed to propose this method as a European Standard test method. One reason is to be able to set requirements on aggregates to be used in countries where studded tyres are allowed. A cross-testing project regarding this Nordic abrasion test for studded tyres was set up in order to determine the repeatability and the reproducibility of the test method, according to ISO 5725-86. (A)