PAVEMENT DESIGN BY THE ASPHALT INSTITUTE METHOD

STRUCTURAL DESIGNS OF FLEXIBLE PAVEMENTS IN THE PAST HAVE INCORPORATED LAYERS OF UNSTABILIZED GRANULAR BASE AND SUBBASE AS PART OF THE PAVEMENT STRUCTURE. IT WAS FELT THAT THESE GRANULAR MATERIALS WERE BENEFICIAL TO THE PAVEMENT AND PROTECTED THE ASPHALT CONCRETE SURFACE LAYERS FROM DAMAGE BY WATER AND FROST. RECENT RESEARCH, HOWEVER, SEEMS TO POINT TO THE FACT THAT THESE GRANULAR MATERIALS SERVE AS RESERVOIRS FOR WATER AND ARE DETRIMENTAL TO LONG PAVEMENT LIFE. THE USE OF FULL-DEPTH FLEXIBLE PAVEMENTS---WITH ASPHALT CONCRETE LAYERS EMPLOYED FOR ALL COURSES ABOVE THE SUBGRADE--- OVERCOMES THE DISADVANTAGES OF GRANULAR BASE PAVEMENTS. STRUCTURALLY DESIGNED FULL-DEPTH PAVEMENTS CONSIDER TWO FACTORS IN DETERMINING THE REQUIRED THICKNESS OF THE PAVEMENT: THE LOAD WHICH THE PAVEMENT MUST CARRY AND THE STRENGTH OF THE SOIL ON WHICH THE PAVEMENT WILL BE BUILT. PROPERLY DESIGNED, A FULL-DEPTH ASPHALT CONCRETE IS THE BEST PAVEMENT AT ANY PRICE, BUT IT USUALLY COSTS LESS BOTH TO BUILD AND TO MAINTAIN. CHARTS FOR FROST PENETRATION AND TYPICAL DESIGN APPLICATIONS ARE APPENDED. /AUTHOR/

• Supplemental Notes:
  • pp 129-138, 3 FIG, 9 REF
• Authors:
  • Scherocman, J A
• Conference:
  • Ohio Highway Engineering Conference Proceedings
• Publication Date: 1970-4

Subject/Index Terms

• TRT Terms: Asphalt concrete; Asphalt pavements; Base course (Pavements); Bituminous aggregates; Flexible pavements; Frost; Granular materials; Moisture content; Pavement design; Pavement layers; Pavements; Subbase (Pavements); Surface course (Pavements); Thickness; Wearing course (Pavements)
• Uncontrolled Terms: Frost penetration; Pavement thickness; Subbase
• Subject Areas: Highways; Pavements;

Filing Info

• Accession Number: 00205971
• Record Type: Publication
• Report/Paper Numbers: pp 111-115
• Files: TRIS
• Created Date: Apr 23 1972 12:00AM