COMPARISON OF DENSITY OF MARSHALL SPECIMENS AND PAVEMENT CORES
PAVING TECHNOLOGISTS GENERALLY AGREE THAT THE TWO PRINCIPAL CAUSES OF THE DETERIORATION OF A BITUMINOUS PAVEMENT ARE (1) THE ACTION OF WATER IN STRIPPING ASPHALT FROM THE AGGREGATE, AND (2) THE HARDENING OF THE ASPHALT. MANY FACTORS, INCLUDING THE CHEMICAL AND PHYSICAL NATURES OF THE ASPHALTIC MATERIALS, AFFECT THE ABILITY OF A BITUMINOUS MIX TO RESIST DETERIORATION, AND, SINCE THE CHEMICAL AND PHYSICAL PROPERTIES OF THE MATERIALS ARE INFLUENCED BY THE SOURCE OF THE CRUDE OIL AND THE METHOD OF MANUFACTURE, SOME ASPHALTS MAY BE SUPERIOR TO OTHERS FOR HIGHWAY WORK. HOWEVER, THE DETERIORATION OF ANY ASPHALTIC MIX CAN BE RETARDED CONSIDERABLY BY UTILIZING GOOD DESIGN PROCEDURES, AND THE EXCLUSION OF AS MUCH WATER AND AIR AS POSSIBLE IS THE BASIC OBJECTIVE IN ATTAINING DURABLE PAVEMENTS. STABILITY REQUIREMENTS MAKE INADVISABLE THE ATTAINMENT OF AN AIR VOIDS CONTENT BELOW A CERTAIN POINT. THE REDUCTION OF VOIDS BELOW THAT AMOUNT NECESSARY TO PROVIDE FOR SUMMER EXPANSION CAN RESULT IN SHOVING AND PUSHING OF THE PAVEMENT. NEARLY EVERY DESIGN METHOD RECOGNIZES THIS AND DOES NOT PERMIT THE AIR VOIDS CONTENT TO DROP BELOW A CERTAIN MINIMUM. THE FACT THAT SO MANY DESIGN PROCEDURES EMBODY AN AIR VOIDS CRITERION MANIFESTS THE IMPORTANCE OF THIS ASPECT OF DESIGN.
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Supplemental Notes:
- Vol 24, pp 178-232
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Authors:
- Dillard, J H
- Conference:
- Publication Date: 1955
Subject/Index Terms
- TRT Terms: Aggregates; Air voids; Alternatives analysis; Asphalt hardening; Bituminous pavements; Crude oil; Density; Design; Deterioration; Expansion; Stability (Mechanics); Stripping (Pavements); Water
- Uncontrolled Terms: Design criteria; Sources
- Old TRIS Terms: Air voids content
- Subject Areas: Design; Geotechnology; Highways; Materials;
Filing Info
- Accession Number: 00210986
- Record Type: Publication
- Source Agency: Highway Research Board Bibliography
- Files: TRIS
- Created Date: Apr 21 1994 12:00AM