RECENT FULL-SCALE FLEXIBLE PAVEMENT DESIGN EXPERIMENTS IN BRITAIN

FULL SCALE FLEXIBLE PAVEMENT DESIGN EXPERIMENTS WHICH HAVE BEEN CONSTRUCTED IN GREAT BRITAIN ARE DISCUSSED. DETAILED RESULTS ARE GIVEN FOR ONLY ONE OF THESE AS THE REMAINDER HAVE NOT YET BEEN IN SERVICE LONG ENOUGH FOR MEASUREMENTS TO BE SIGNIFICANT. THE PRINCIPLE METHOD OF ASSESSMENT OF SURFACE DEFORMATION HAS CONTINUED TO BE THE COMPARISON UNDER TRAFFIC AS MEASURED BY ACCURATE SURVEYING TECHNIQUES, MEASUREMENTS OF TRANSIENT DEFLECTION UNDER A STANDARD LOAD HAVE BEEN INCREASINGLY USED. A SUMMARY IS PRESENTED OF THE SITES OCCUPIED BY THE EXPERIMENTS AND DETAILS OF EACH ARE GIVEN IN TABLES. AS OBSERVATIONS OF THESE SITES CONTINUE IT IS HOPED TO DERIVE FROM THEM MORE DEFINITE CONCLUSIONS ON ON THE DESIGN REQUIREMENTS FOR ASPHALT PAVEMENTS WITH UNBOUND, CEMENT-BOUND AND BITUMEN BOUND BASES.