THE DURABILITY OF OLD ASPHALT ROADBASES
BEWAEHRUNG ALTER ASPHALTTRAGSCHICHTEN
CITING THE EXAMPLE OF THE MOTORWAY COLOGNE-HAGEN CONSTRUCTED IN 1958 BEFORE PUBLICATION OF THE RU BIT 60 (I.E. WITHOUT VALID GUIDELINES OR REGULATIONS) WHICH HAD AN ASPHALT ROADBASE CONSISTING OF 3 LAYERS EACH 6 CM THICK AND A COMPOSITION OF 65-69% BY WEIGHT OF GRAVEL, 23-25% CRUSHED LIMESTONE 0/35, 4,5 - 4,9% FILLER AND 4,3% B 80, THE AUTHOR SHOWS, ON THE BASIS OF MIX ANALYSES FROM THE CONSTRUCTION PERIOD AND TESTS ON MARSHALL TEST SPECIMENS IN AN OFFICIAL TESTING STATION AND THE PAE LABORATORY AS WELL AS FROM THE EXAMINATION OF CORES TAKEN IN 1976, THE PROVEN EXCELLENCE AND DURABILITY OF THIS PAVEMENT MIX. VARIATIONS IN THE PARTICLE SIZE DISTRIBUTION IN THE FRAMEWORK OF THE NORMAL TOLERANCES COULD NOT BE OBSERVED. THE PRESENT PROPORTION OF PARTICLES ABOVE 2 MM IS SLIGHTLY LOWER AND THE FILLER CONTENTS SOMEWHAT HIGHER. IN VIEW OF THE GREATLY INCREASED TRAFFIC DENSITY (1960: 5800, 1975: 37900 VEHICLES/24 H) THE DURABILITY MAY BE TERMED EXCELLENT. THE AUTHOR THEREFORE RECOMMENDS A CERTAIN AMOUNT OF CAUTION WITH REFERENCE TO THE TREND TOWARDS RAISING THE REQUIREMENTS FOR MIXES AND TO REDUCE THE TOLERANCE LIMITS FOR MIX PROPORTIONS IN THE FORTHCOMING REVISION OF TVT 72. REFERENCE IS MADE TO THE FORTHCOMING PUBLICATION OF JOINT RESEARCHES BY ARBIT, ESSO-AG AND GERMAN SHELL.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/issn/03444732
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Authors:
- Peffekoven, W
- Publication Date: 1977-4
Language
- German
Media Info
- Pagination: 93-5
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Serial:
- STATIONAERE MISCHWERK
- Volume: 11
- Issue Number: 2
- ISSN: 0344-4732
Subject/Index Terms
- TRT Terms: Base course (Pavements); Binder content; Bituminous mixtures; Core samples; Evaluation; Freeways; Grain size (Geology); Mix design; Standards; Tests
- Uncontrolled Terms: Modifications; Particle size distribution
- ITRD Terms: 4929: Binder content; 4967: Bituminous mixture; 5700: Core (boring); 9020: Evaluation (assessment); 4714: Mix design; 9048: Modification; 2752: Motorway; 6200: Particle size distribution; 2961: Roadbase; 187: Specification (standard); 6255: Test
- Subject Areas: I31: Bituminous Binders and Materials;
Filing Info
- Accession Number: 01303526
- Record Type: Publication
- Source Agency: Forschungsgesellschaft für Straßen- und Verkehrswesen (FGSV)
- Files: ITRD
- Created Date: Nov 21 2010 9:05AM