MODERN CONCEPTS FOR GRADATION CONTROL. PHASE IV. GRANULAR BASE COURSES

During 1970, 1971 and 1972 gradation data were obtained on granular base courses that were being constructed on several Minnesota trunk highways. Data were collected and analyzed from randomly selected locations on ten projects. A statistical analysis was also performed on job control data for the ten projects and also on results from numerous other granular base projects. Variation was determined from these data by computing the mean and standard deviation to reveal existing variability in acceptable construction of granular base aggregates. The results were used to evaluate present specifications and to develop a new acceptance sampling plan based on statistical concepts that will define the degree of acceptable variation upon which decisions can be made with an established degree of confidence. Proposed statistical specifications are presented.

• Supplemental Notes:
  • See also report on Phase 3 dated 1973, PB-231 552.
• Corporate Authors:

  Minnesota Department of Highways

  Office of Research Coordination
  St Paul, MN  United States  55101

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Wolters, R O
• Publication Date: 1974

Media Info

• Pagination: 55 p.

Subject/Index Terms

• TRT Terms: Acceptance sampling; Aggregate gradation; Aggregates; Data collection; Granular bases; Highways; Materials; Pavement base course; Primary highways; Quality assurance; Quality control; Sampling; Screens; Sizing apparatus; Specifications; Statistical analysis; Stochastic processes; Variables
• Geographic Terms: Minnesota
• Old TRIS Terms: Gradation analysis; Materials specifications; Sizing screens
• Subject Areas: Data and Information Technology; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00091378
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: MN-HW-5-180-74-5 Final Rpt.
• Files: NTIS, TRIS, USDOT, STATEDOT
• Created Date: Jul 15 1975 12:00AM