Abstract

The British polish stone value or PSV test method is widely used around the world to measure the skid resistance of aggregate. It has been a British Standard for many years and forms the basis of the specification for surfacing aggregate in the United Kingdom. It has recently become a European Standard. With various modifications the test equipment is used in many other countries around the world. However, the method was developed about 60 years ago and has remained relatively unchanged since. In contrast there has been tremendous change in the amount of traffic and the stressing experienced by surfacing aggregate. This paper reports on research carried out to improve understanding between the laboratory prediction of aggregate skid resistance and actual performance in-service