SYMPOSIUM-THICKNESS VARIATION OF ASPHALT CONCRETE - PART 1 - IMPORTANCE OF THICKNESS CONTROL - HOW WELL CAN WE EXPECT TO CONTROL THICKNESS{

THE AASHO ROAD TEST WAS A RESEARCH PROJECT, THEREFORE UNIFORMITY IN CONSTRUCTION CONTROL WAS EXTREMELY IMPORTANT. TO SECURE THE REQUIRED UNIFORMITY IN THICKNESS THE EMBANKMENT SOIL, SUBBASE AND BASE WERE SUBGRADED BY MECHANICAL SUBGRADERS RIDING ON SIDE FORMS. EACH SUBGRADED LAYER WAS REQUIRED TO BE WITHIN PLUS OR MINUS 1/8 IN. OF ESTABLISHED GRADE AND THE BASE AND SUBBASE WERE NOT PERMITTED TO DEVIATE MORE THAN PLUS OR MINUS 1/2 IN. FROM PLAN THICKNESS. THE ASPHALT CONCRETE SURFACING WAS REQUIRED TO BE WITHIN 1/8 IN. OF ESTABLISHED GRADE WHEN CHECKED BY A 10 FT. STRAIGHT EDGE. THE TOTAL THICKNESS OF THE COMPLETED MAT /SURFACE PLUS BINDER/ WAS TO BE WITHIN PLUS OR MINUS 1/4 IN. OF THE DESIGN THICKNESS. GUIDE WIRES FOR THE PAVER AND ROD AND LEVEL MEASUREMENTS WERE USED TO SECURE THE REQUIRED CONTROL. A QUESTION PERTINENT TO THE SUBJECT OF THIS SYMPOSIUM IS, HOW WELL DID WE CONTROL THICKNESS ON THE AASHO ROAD TEST{ REFERENCE TO THICKNESS MEASUREMENTS REPORTED IN THE AASHO ROAD TEST, REPORT 2, MATERIALS AND CONSTRUCTION /1/ AND TO INDEPENDENT ANALYSES OF THE DATA WILL BE MADE IN DISCUSSING THIS QUESTION. /NAPA/

• Supplemental Notes:
  • Vol33, Pp2-10, 18-26
• Authors:
  • Shook, J F
• Conference:
  • Association of Asphalt Paving Technologists Proc
• Publication Date: 1964-2

Subject/Index Terms

• TRT Terms: Asphalt concrete; Base course (Pavements); Bituminous pavements; Conferences; Construction management; Design; Embankments; Indicators (Instruments); Machinery; Pavements; Pavers; Rods; Subbase (Pavements); Surfacing; Thickness
• Identifier Terms: AASHO Road Test
• Uncontrolled Terms: Design criteria; Subbase
• Old TRIS Terms: Construction control; Guide wires; Level indicators; Mechanical equipment; Pavement course thickness; Subgraders
• Subject Areas: Construction; Design; Highways; Materials; Pavements;

Filing Info

• Accession Number: 00214427
• Record Type: Publication
• Source Agency: National Asphalt Pavement Association (NAPA)
• Files: TRIS
• Created Date: Aug 12 1970 12:00AM