Paper by CLEE from ISCR 6th 1990
R.oadpaint containing a dissolving agent and hot applied ther-noplastic marking materials are most commonly used for roadnarking in the Netherlands. The only marking materials al-lowed on Dutch motorways are those that have proven theirsuitability in laboratory research and experimental sections on:he road. During a period of 25 years no concrete pavementslave been constructed in the Netherlands. Since 1972 the yearlyexperimenral road test for marking materials are held only onoituminous pavements. This was based on the conclusionsdrawn from previous road tests, as it was assessed that all thenarking materials that were suitable for bituminous pavementswere also suitable to old concrete pavements.Since 1984, due to changed economical circumstances, theDutch Public Works Department again started the constructionof concrete pavements. Together with the construction of these[lew concrete pavements, problems with road marking arose.Road paint and thermoplastic marking materials disappearedshortly after being laid on the road surface. A study on relevantproperties of concrete and concrete road surfaces in relation tomarking materials enhanced the insight in this field. Connected:0 this study a road test was installed in 1987 in which a widevariety of marking materials was applied on wet as well as onIry surfaces. This study finally resulted in recommendations forchepre-treatment of the surfaces to be marked and for the kindof materials to be used for this purpose.