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- W611125329 abstract "PERFORMANCE OF SMALL-SCALE ROAD TEST SECTIONS CONTAINING DENSE-GRADED ASPHALTIC CONCRETE HAS SHOWN THE EFFECT OF SEVERAL VARIABLES IN MIX DESIGN ON RESISTANCE TO PAVEMENT CRACKING, DISPLACEMENT AND FLUSHING. CORE SAMPLES REMOVED FROM THE SECTIONS AFTER 15 AND 43 MONTHS SERVICE REVEAL THE CONSIDERABLE DENSIFICATION THAT TOOK PLACE UNDER TRAFFIC WHILE THE PAVEMENT WAS STILL RELATIVELY NEW. SUBSTANIALLY ALL DENSIFICATION OCCURRED DURING THE FIRST 15 MONTHS. THE AMOUNT OF DENSIFICATION DURING THIS PERIOD IS SHOWN TO BE RELATED TO THE POTENTIAL DENSIFICATION, OR THE CHANGE IN AGGREGATE VOIDS THAT CAN OCCUR BEFORE THE THEORETICAL ZERO - AIR - VOIDS CONTENT IS REACHED. LEAN MIXES, WITH A HIGH POTENTIAL CHANGE, SHOW AN AVERAGE REDUCTION OF 8.0 PERCENT, WHEREAS RICH MIXES PRODUCE ONLY A 4.0 PERCENT CHANGE. DENSIFICATION OF THE PAVEMENT TENDS TO CONTINUE UNTIL THE AGGREGATE VOIDS ARE WITHIN APPROXIMATELY 3.6 PERCENT OF THE THEORETICAL ULTIMATE CONTENT FOR MIXES OF THIS TYPE. PERFORMANCE RATINGS FROM TO BRITTLE SHOW THE STRONG INFLUENCE OF ASPHALT CONTENT ON PERFORMANCE. LEAN MIXES IN THESE TESTS ARE PREDOMINANTLY SATISFACTORY, THEIR ASPHALT CONTENTS BEGIN BELOW THE AMOUNT NECESSARY TO FILL THE VOID SPACE WHEN THE AGGREGATE ACHIEVES ITS MAXIMUM DENSITY. WHEN THIS LIMITING SPACE IS OVERFILLED, THE MIX BECOMES SUSCEPTIBLE TO PLASTIC DEFORMATION AND FLUSHING. LIMITING ASPHALT CONTENTS OF 4.1 PERCENT TO 4.5 PERCENT (BY WEIGHT) CORRESPOND TO AGGREGATE VOIDS VALUES OF LESS THAN 14 PERCENT ( BY VOLUME) WHICH HAVE BEEN MEASURED IN THE PAVEMENT. THESE FINDINGS SHOULD AID IN DESCRIBING THE CHANGES THAT CAN BE EXPECTED IN SERVICE. THEY ALSO PROVIDE INFORMATION RELATING TO THE IMPORTANT FACTORS AFFECTING SATISFACTORY DESIGN. /AUTHOR/" @default.
- W611125329 created "2016-06-24" @default.
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- W611125329 date "1959-01-01" @default.
- W611125329 modified "2023-09-23" @default.
- W611125329 title "RELATION OF DENSIFICATION TO PERFORMANCE OF SMALL-SCALE ASPHALTIC CONCRETE TEST SECTIONS" @default.
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