EFFECTS OF STRENGTH VARIATIONS ON PAVEMENT DESIGN
PAVEMENTS OLDER THAN EIGHT YEARS CAN BE READILY CLASSIFIED IN APPEARANCE AS UNIFORM OR NON-UNIFORM. NON-UNIFORM TYPES ARE CHARACTERIZED BY AREAS OF DISTRESS OF MINOR EXTENT WHICH STRONGLY AFFECT THE PERFORMANCE RATING OF THE SECTION. SELECTED UNIFORM PAVEMENTS PERFORM AT A MUCH HIGHER LEVEL DURING THEIR LIFE THAN THE AVERAGE FOR CANADA. STRENGTH TESTS SHOW UNIFORM REBOUND CONDITIONS AT THE PAVEMENT SURFACE; RELATIVELY THIN PAVEMENTS WILL SATISFY THE COMMITTEE'S REBOUND CRITERIA FOR DESIGN. NON-UNIFORM PAVEMENTS ARE THE GENERAL CASE FOR CANADA. UNIFORM STRENGTH AT THE SURFACE CAN BE ACHIEVED BY PROVIDING AT LEAST 12 INCHES ADDITIONAL GRANULAR MATERIAL; THIS PROTECTS THE WEAKEST AREAS OF THE SUBGRADE BUT REPRESENTS AN OVERDESIGN FOR ABOUT 98 PER CENT OF THE AREA OF THE PAVEMENT. DENSITY CONTROL MEASURES DURING CONSTRUCTION WILL NOT ASSURE UNIFORM SUBGRADE STRENGTHS. BENKELMAN REBOUND TESTING CONTROL DURING CONSTRUCTION IS RECOMMENDED AS A PRACTICAL METHOD OF ACHIEVING UNIFORMITY AND PRODUCING MORE ECONOMICAL PAVEMENT DESIGNS. /AUTHOR/
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Supplemental Notes:
- pp 140-145, 1 FIG, 3 TAB, 2 REF
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Authors:
- Wilkins, E B
- Publication Date: 1966-9
Media Info
Subject/Index Terms
- TRT Terms: Defects; Granular materials; Impacts; Pavement design; Pavement distress; Pavement performance; Pavements; Rebound; Strength of materials; Subgrade (Pavements); Surfaces; Testing; Variables
- Uncontrolled Terms: Criteria; Surface area
- Old TRIS Terms: Variations
- Subject Areas: Highways; Pavements;
Filing Info
- Accession Number: 00206571
- Record Type: Publication
- Source Agency: CANADIAN GOOD ROADS ASSOCIATION
- Files: TRIS
- Created Date: Jan 30 1994 12:00AM