APPLICABILITY OF CONTROL CHARTS TO CONCRETE PRODUCTION AND INSPECTION
THE CONCEPTS OF PROCESS CONTROL AND THEIR APPLICABILITY TO CONCRETE PRODUCTION ARE DISCUSSED. THE COMMONLY USED TYPES OF PROCESS CONTROL CHARTS ARE REVIEWED, AND CONCURRENT USE OF R- AND X- X-CHARTS IS RECOMMENDED. PARTICULAR ATTENTION IS GIVEN TO SELECTION OF PRODUCER'S RISK, RATIONAL SUBGROUP, AND SUBGROUP SIZE AND TO CORRECT PROCEDURES FOR DETERMINING THE VARIATION NEEDED TO SET CONTROL LIMITS. IN ADDITION, OPERATING CHARACTERISTICS CURVES ARE PRESENTED TO SHOW HOW THE NUMBER OF RATIONAL SUBGROUPS USED IN SETTING UP THESE CHARTS AFFECTS THE PROBABILITY OF FALSELY DECLARING A PROCESS IN CONTROL. OTHER OPERATING CHARACTERISTIC CURVES ARE PRESENTED TO SHOW THE EFFECT OF RATIONAL SUBGROUP SIZE ON THE ABILITY OF R- AND X-CHARTS TO DETECT RESPECTIVELY CHANGES IN PROCESS VARIATION AND SLIPPAGES IN PROCESS MEANS. GUIDELINES FOR INITIAL USE ARE OFFERED FOR PRODUCERS WHO WISH TO INSTITUTE FORMALIZED PROCESS CONTROL IN CONCRETE PLANTS BUT WHO LACK THE NECESSARY DATA. THE PAPER ALSO DISCUSSES THE APPLICABILITY OF ACCEPTANCE CONTROL CHARTS TO CONCRETE INSEPCTION. THEIR CONCEPTS AND ASSUMPTIONS ARE CONSIDERED IN LIGHT OF CONCRETE PROPERTIES, AND IT IS CONCLUDED THAT THEY ARE NOT APPROPRIATE FOR CONCRETE INSPECTION. SPECIFICALLY, IT IS SHOWN THAT ASSUMPTIONS NECESSARY FOR PROPER USE OF ACCEPTANCE CONTROL CHARTS ARE NOT SATISFIED BY CONCRETE PROPERTIES AND THAT, EVEN IF THEY WERE, THERE WOULD BE NO ADVANTAGE IN USING THEM INSTEAD OF SAMPLING AND TESTING REQUIRED WOULD BE THE SAME.
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Availability:
- Find a library where document is available. Order URL: http://worldcat.org/isbn/0309021634
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Supplemental Notes:
- Sponsored by Committee on Quality Assurance and Acceptance Procedures. 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
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Authors:
- DiCocco, John B
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Conference:
- 52nd Annual Meeting of the Highway Research Board
- Location: Washington District of Columbia, United States
- Date: 1973-1-22 to 1973-1-26
- Publication Date: 1973
Media Info
- Media Type: Print
- Features: Figures; References;
- Pagination: pp 42-58
- Monograph Title: Corrosion, concrete and quality control
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Serial:
- Highway Research Record
- Issue Number: 433
- Publisher: Highway Research Board
Subject/Index Terms
- TRT Terms: Charts; Concrete; Process control; Production control
- Subject Areas: Construction; Highways;
Filing Info
- Accession Number: 00215667
- Record Type: Publication
- ISBN: 0309021634
- Files: TRIS, TRB
- Created Date: Dec 22 1973 12:00AM