COLORADO DIVISION OF HIGHWAYS' EXPERIENCE WITH STATISTICAL SPECIFICATIONS

FULL CONTRACTOR QUALITY CONTROL TESTING PROGRAMS IN THE LIGHTLY POPULATED WESTERN STATES WOULD NOT BE FEASIBLE OR PRACTICAL. MOST OF THESE STATES HAVE PRODUCED MATERIALS ACCEPTANCE PLANS THAT ALLOW THE TEST RESULTS TO BE USED, TO A CERTAIN DEGREE, FOR CONSTRUCTION QUALITY CONTROL. THIS IS COLORADO'S APPROACH. THE STANDARD SPECIFICATION AT PRESENT MAKES NO REFERENCE TO STATISTICAL PROCEDURES, WHICH MEANS THE ENGINEER MUST BASE HIS DETERMINATION OF REASONABLY CLOSE CONFORMITY ON INDIVIDUAL TEST RESULTS. DIFFERENT ENGINEERS HAVE DIFFERENT IDEAS OF WHAT CONSTITUTES 'REASONABLY CLOSE.' FOR THIS AND OTHER REASONS, THE STATE HAS BEEN EXAMINING VARIOUS STANDARDIZED METHODS AND HAS ESTABLISHED ITS OWN PROCEDURE, WHICH IS SIMILAR TO THAT BEING USED IN REGION 9 OF THE FHWA. THE NEW SPECIFICATION AND EXAMPLES OF ITS USE ARE GIVEN.

• Authors:
  • Brakey, B A
• Conference:
  • New Mexico Highway Engineering Conference Proc
• Publication Date: 1971-9

Media Info

• Features: Figures;
• Pagination: p. 114-25
• Serial:
  • Issue Number: 44

Subject/Index Terms

• TRT Terms: Acceptance sampling; Materials tests; Specifications; Standardization; Statistical quality control
• Subject Areas: Construction; Highways;

Filing Info

• Accession Number: 00215547
• Record Type: Publication
• Files: TRIS
• Created Date: Feb 3 1973 12:00AM