INSTALLATION OF AN EXPERIMENTAL ROAD FOR SURFACE DRESSINGS WITH PVC ROAD TARS AND CONVENTIONAL BINDERS FOR COMPARISON PURPOSES UNDER SIMILAR CONDITIONS

ANLAGE EINER VERSUCHSSTRECKE FUER OBERFLAECHENBEHANDLUNGEN MIT PVC-STRASSENTEEREN UND UEBLICHEN BINDEMITTELN ZU VERGLEICHSZWECKEN UNTER GLEICHEN BEDINGUNGEN

ON AN EXPERIMENTAL ROAD IT IS INTENDED TO LAY SURFACE DRESSINGS HAVING 5 DIFFERENT BINDERS (1-BITUMEN TAR WITH INCREASED BITUMEN CONTENT,34-45 PERCENT WEIGHT EQUIVISCOUS TAR 43 DEGREESC; 2-PVC TAR1; 3 - PVC TAR 11; 4- BITUMEN EMULSION U 70 K; 5 - BITUMEN EMULSION WITH LATEX ADMIXTURE),THE SECTION OF ROAD HAVING VERY SIMILAR CONDITIONS AND AN AVERAGE TRAFFIC VOLUME OF ABOUT 3000 VEHICLES/24 HRS.THREE DIFFERENT STONE PARTICLE SIZES (5/8MM, 8/12 MM,8/12 + 2/5MM),BOTH CRUDE AND COATED,ARE TO BE USED FOR SPREADING ON THE SURFACE.THE BINDERS ARE SPRAYED FROM RAMP-TYPE SPRAYING EQUIPMENT.THE QUANTITY OF BINDER TO BE SPRAYED ON IS KEPT AS CONSTANT AS POSSIBLE IN THE INDIVIDUAL SECTIONS EXCEPT FOR A SLIGHT DECREASE WHEN PRE- COATED CHIPPINGS AND PARTICLE-SIZE 5/8 MM ARE USED.THE TESTING OF THE BINDERS SHOULD BE CARRIED OUT IN ACCORDANCE WITH EXISTING SPECIFICATIONS AND NEW METHODS OF TEST WITH RESPECT TO ADHESION STRENGTH,AGEING STRENGTH UNDER NATURAL AND ARTIFICIAL WEATHERING AND LOW-TEMPERATURE BEHAVIOUR. AFTER THE CONSTRUCTION HAS BEEN COMPLETED,THE INDIVIDUAL SECTIONS ARE BEING OBSERVED AND EVALUATED BY MEANS OF AN INSPECTION LEAFLET.