Fog-seal is a maintenance measure which is suited to paved surfaces with limited traffic. The main reason for fog-seal is to limit the continuous process of ageing. Fog-seal provides the surface with a thin layer of binder which affects the flexibility of the surface. Different clients have different demands on the surface so to help the clients with their special demands, working with fog-seal, this project started up. One of the purposes of the work described in this report was to test new methods of measuring certain qualities. Another purpose was to examine the products available on the market with a view to the following function demands; wet friction, texture, ageing, stone loss and surface sealing. The project was forced to find a suitable method for the purpose to measure surface sealing. To measure stone loss the project used a method for high quality pavements, the Prall-equipment. This method can be modified so that the accelerating wear can be made to resemble that occuring on a low trafficked surface. In 1994 further follow-up experiments were conducted based on the results of the Straengnaes experiment. The work carried out with fog-seal as part of this project has in all probably driven development forwards. Before the project started, there were difficulties in measuring some of the function demands set on a fog-sealed surface. This project has lead to development of purely design character, i.e. determining when and how fog-seal should be applied. (A)
Abstract