The effects of winter road maintenance methods using sodium chloride in the form of brine (22% salt solution) and prewetted salt (70% dry salt plus 30% brine) were assessed in Denmark. The residual quantity of residual salt on the road was higher when using brine than when using prewetted salt. A reduction of salt consumption was possible by adding more liquid to the dry salt or by spreading the salt in the form of a concentrated saline solution. The possibilities of saving salt were evaluated on a motorway in Funen, Denmark during 2000-2002. The advantages of liquid spreading are outlined. The results obtained in hoar frost and snow conditions are outlined. There were no differences between the efficiencies of prewetting spreading and liquid spreading in hoar frost conditions. In snow conditions, prewetted spreading was more effective than liquid spreading.
Samenvatting