STATISTICAL SPECIFICATION FOR THE ACCEPTANCE OF PUG MILL- MIXED BASE AND SUBBASE MATERIALS

THE SYSTEM CURRENTLY USED IN VIRGINIA FOR ACCEPTING PUG MILL-MIXED BASE AND SUBBASE MATERIALS AND A PROPOSED SYSTEM BASED ON A JOB-MIX BAND AND A PROCESS TOLERANCE CONCEPT ARE DISCUSSED. A RANDOM SAMPLING PLAN WAS USED TO COLLECT SAMPLES FROM 14 PLANTS IN VIRGINIA THAT PRODUCE SUBBASE AND BASE MATERIALS. THE SAMPLES WERE TESTED TO DETERMINE THEIR GRADATION AND LIQUID AND PLASTIC LIMITS. FROM THE RESULTS, AVERAGE STANDARD DEVIATIONS FOR EACH PROPERTY WERE DETERMINED AND USED FOR THE SELECTION OF THE JOB-MIX BAND AND THE PROCESS TOLERANCES. THE PROPOSED SPECIFICATIONS, WHICH PERMIT ACCEPTANCE OR REJECTION OF 2,000-TON LOTS, ARE BELIEVED TO HAVE THE FOLLOWING ADVANTAGES: THE USE OF A JOB-MIX BAND SHOULD RESULT IN MORE UNIFORMLY GRADED MATERIALS; JOB-MIX BANDS DEVELOPED BY USE OF AVERAGE STANDARD DEVIATIONS WILL ALLOW FLEXIBILITY IN THE OPERATIONS OF THE PLANTS; AND THE PROCESS TOLERANCES DEVELOPED, WHICH ARE BASED ON THE AVERAGES OF 4 SAMPLES, WILL ALLOW FOR DAY-TO-DAY VARIATIONS IN MATERIALS. /AUTHOR/

• Record URL:
  • http://onlinepubs.trb.org/Onlinepubs/hrr/1971/357/357-004.pdf
• Availability:
  • Find a library where document is available. Order URL: http://worldcat.org/isbn/0309019702
• Supplemental Notes:
  • Sponsored by Committee on Quality Assurance and Acceptance Procedures and presented at the 50th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved.
• Authors:
  • Anday, M C
• Conference:
  • 50th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1971-1-18 to 1971-1-22
• Publication Date: 1971

Media Info

• Media Type: Digital/other
• Features: Figures; Tables;
• Pagination: pp 39-52
• Monograph Title: Quality assurance, concrete, construction, bridge deck coating, and joint seals
• Serial:
  • Highway Research Record
  • Issue Number: 357
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Base course (Pavements); Materials; Pug mills; Specifications; Statistical quality control; Subbase materials
• Old TRIS Terms: Job mix formula; Materials specifications
• Subject Areas: Construction; Highways; Materials;

Filing Info

• Accession Number: 00215458
• Record Type: Publication
• ISBN: 0309019702
• Files: TRIS, TRB
• Created Date: Mar 7 1972 12:00AM