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REPORT to RPF

REPORT to RPF. November 2007 TMH1 Revision & Proficiency Testing Mervyn Henderson TMH1 report prepared by Dave Wright. TMH1 Revision - OVERVIEW. Under auspices of MTC Funded by SANRAL, PAWC, Freetrans and SABITA Priorities set by funders PURPOSE

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REPORT to RPF

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  1. REPORT to RPF November 2007 TMH1 Revision & Proficiency Testing Mervyn Henderson TMH1 report prepared by Dave Wright

  2. TMH1 Revision - OVERVIEW • Under auspices of MTC • Funded by SANRAL, PAWC, Freetrans and SABITA • Priorities set by funders PURPOSE • Rewrite TMH1 methods into SANS format, where necessary improving and amending • Publish as SANS managed by SABS • Legal standing, credibility in Africa and long-term ownership • Stand-alone methods – reviewed after first year in use

  3. TMH1 Revision - OVERVIEW PROCEDURE • First Draft circulated as widely as possible throughout industry (also SADIC) • Contentious issues reviewed by small working groups • Final Draft approved by MTC and submitted to SABS • SABS: Tech review, Edit review, TC 61 subcommittee, call for Public Comment & Objections, Final Approval and Publication

  4. PILOT STAGE • 11 Methods – In Final Draft Awaiting 2 normative references • Wet grading, Atterberg Limits and Linear Shrinkage (3 LL procedures), Moisture content, Dry grading, ALD (Meas & Comp), Calcs of GM, FM etc, Mod and CBR • Been through SABS up to review by TC61 subcommittee

  5. SECOND STAGE • 17 First Drafts sent out for industry comment • Aggregates: grading, FI, ACV, 10% FACT, ARD / BRD • Concrete: Lab mix specimens, Slump, Dimensions of specimens & compr. strength • Checking, handling and maintenance of sieves • Stabilization testing including UCS & ITS Currently being prepared for Final Drafts

  6. SECOND STAGE SABITA funded work • 5 Asphalt Methods - First Draft To be discussed separately in RPF • 6 Binder Distributor Tests from SABITA DRAFT MANUAL • Being ‘SANS-ified’ by Project team • SABITA investigating alternative procedures to annual ‘certification’ of BDs – move away from ‘test centres’ to more accessible form of checking for ‘fit for purpose’ using SANS test methods

  7. NUCLEAR DENSITY TESTING • Recent Problems with Nuclear Gauge Density measurements • Issues raised in meeting at SANRAL WC in March 2007 – Dave Wright asked to work on as priority in conjunction with Barry Dumas • Work attached to TMH1 brief and funded through PAWC contribution • Major misconception – not a density meter!

  8. NUCLEAR DENSITY TESTING • Issues requiring attention • Calibration of gauges • Operator certification including handling procedures • Verification – standard blocks • Testing procedure – initialization, bedding, orientation, count time, block checks • Interpretation of results • Problem materials

  9. NUCLEAR DENSITY TESTING • Calibration investigation • Currently under way – prelim results indicateinteresting improvement to calibration • Will confirm with more detailedinvestigationover year-end break when a suitableassortment of makes and ages of gauges will be available • Will then proceed with validation of gauges and field testing

  10. TMH1 PROJECT TEAM • Tony Lewis • Wim Westra • Basie Nothnagel • Dave Wright CONTACT e-mail dfhw@telkomsa.net cell 082 790 6176 phone 021 790 1643

  11. Proficiency Testing • Tender for phase 1 finalised by Wesley Weber in May 2007 • Phase 1 : establishment of framework for the National Proficiency Testing Services • Tender items include • Provide a Business Plan for (National Proficiency Assessment Services for Roads) NPASR which includes the functional and administrative structure of the National Proficiency Testing Scheme, based on ISO 43 and ILAC G13:2000 • Design a Test Method Registry as well as providing a list of National Standard Test methods required for the Proficiency Testing Programme • Provide a document for statistical randomised sampling procedures and test item preparation as required by the Proficiency Testing Programme • Establish and provide procedures for test item preparation, handling, transporting, storage as well as containers and labelling,etc. (18 items)

  12. Proficiency Testing • NO TAKERS could be found in private industry • Rob Damhuis of SANRAL suggested that we ask the National Laboratory Association to assist • NLA has experience with inter laboratory comparison schemes • The scheme empowers the laboratory with valuable data to evaluate staff competency and to identify potential deficiencies in the measurement system • Rob is arranging a meeting with Steve Sidney of the NLA Board to take the matter further

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