BEHAVIOUR OF JOINT SEALING MATERIALS FOR CONCRETE SURFACINGS IN RELATION TO THE OPENING WIDTHS OF THE JOINTS

VERHALTEN VON FUGENVERGUSSMASSEN FUER FAHRBAHNDECKEN AUS BETON IN ABHAENGIGKEIT VON DEN OEFFNUNGSWEITEN DER FUGEN

THE VALID SPECIFICATIONS RELATING TO THE SUPPLY OF BITUMINOUS JOINT SEALING MATERIALS FOR CONCRETE ROADS ARE THOSE BASED ON TEST PROCEDURES IN GERMAN STANDARD DIN 1996, BUT IN PRACTICE A CONSIDERABLE NUMBER OF THE MATERIALS SUPPLIED ARE BASED ON FOREIGN SPECIFICATIONS. THIS MEANS THAT A REVISION OF THE CONDITIONS OF SUPPLY IS NECESSARY, CHECKING OF THE FOREIGN SPECIFICATIONS SHOWS ANOMALIES AND GAPS IN THE REQUIREMENTS AND PROCEDURES. THE RESEARCH HAS THE FOLLOWING OBJECTIVES: 1 - CREATING OF BETTER PRINCIPLES FOR EVALUATING JOINT MATERIALS ON THE MARKET; 2 - REVISION OF THE PRINCIPLES GOVERNING THE CONDITIONS OF SUPPLY; 3 - WORKING OUT OF PROPOSALS FOR IMPROVING THE JOINT SEALING MATERIALS; 4 - CREATION OF PRINCIPLES FOR THE DESIGN OF JOINTS BASED ON PERMISSIBLE TOTAL DEFORMATION OF THE JOINT SEALING MATERIALS.