Foundation for roads and loaded areas: report on discussion

Dr P H Noss, SINTEF, Norway made an invited contribution which gave information about a field test of a road constructed in Norway during the fall of 1983.

The test section is 180m long and is based on clay. The clay is highly susceptible to changes in moisture content and it suffers a significant loss of bearinq capacity during the spring/fall period.

The pavement structure consists of a wearinq course of 35mm of asphalt concrete and a granular base where the thickness varies between 800mm and 400mm. Two different materials have been used as a base material -a crushed stone where a maximum size of 120mm is used, and a wellgraded gravel in the second part. The test section is sub-divided into smaller sections, and on all sections a thin fabric is used as a split between the subgrade and the granular materials.