Lessons learned from long-term road experiments in the Northern Cape

摘要

Challenges in the Northern Cape include the provision of mostly low-volume bitumenised roads in an arid area. In order to minimise costs this has often required the use of local, low cost materials such as crushed stone base course made from waste rock from the copper mines, tailing gravels from the diamond mines, and natural gravels such as calcrete and dorbank. However, each one of these poses its own problems.