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REPORT to RPF

This report outlines the TMH1 Revision process under the auspices of MTC, funded by SANRAL, PAWC, Freetrans, and SABITA, focusing on publishing as SANS and improving legal standing and credibility in Africa. It covers procedures for drafting, reviewing, and final approval by SABS, including pilot stage and methods evaluation. Key issues such as nuclear density testing and operator certification are also addressed. The report aims to enhance industry collaboration and establish a systematic framework for standards.

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REPORT to RPF

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  1. REPORT to RPF May 2007 TMH1 Revision Dave Wright

  2. TMH1 Revision - OVERVIEW • Under auspices of MTC • Funded by SANRAL, PAWC, Freetrans and SABITA • Priorities set by funders PURPOSE • Publish as SANS managed by SABS • Legal standing, credibility in Africa and long-term ownership • During rewriting into SANS format, improve and amend where necessary • 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, Public Comment & Objections, Final Approval and Publication

  4. PILOT STAGE • 11 Methods – In Final Draft • 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 • All except Mod & CBR submitted to SABS in September 2006 • Major delay > 6 months in starting SABS review • SABS have appointed extra staff to assist

  5. SECOND STAGE • 11 First Drafts sent out in April for industry comment • Aggregates: grading, FI, ACV, 10% FACT, ARD / BRD • Concrete: Lab mix specimens, Slump, Dimensions of specimens & compr. strength • Mod MDD of lab mix stab samples • Checking, handling and maintenance of sieves • Very poor industry response

  6. SECOND STAGE • SABITA have put in R 300 000 for work on Asphalt and Bitumen methods • 5 Asphalt Methods - First Draft • Sent to SABITA – Feb 2007 They will • Submit to members • P Myburgh to deal with feedback • Submit to MTC for consideration

  7. SECOND STAGE • 6 Binder Distributor Tests from SABITA DRAFT MANUAL • Being ‘SANSified’ by Project team • Will go to SABITA for comment • 3 Stabilization methods in preparation • Stab field sampling, UCS & ITS

  8. Summary - TMH1 Revisions • Major delays in SABS • Hopefully sorted with extra staff • Normative references • 3 month delay for Project team • Publish first set – whole of Pilot Stage (?) by the end of 2007 • SABS norm = 2 years from inception!! • Once going keep momentum …..

  9. NUCLEAR DENSITY TESTING • RPF Resolution May 2006 “to be handled as it arises in TMH1 Review” • However, 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!

  10. NUCLEAR DENSITY TESTING • Issues requiring attention • Operator certification including handling procedures • Verification – standard blocks • Testing procedure – initialization, bedding, orientation, count time, block checks • Interpretation of results • Problem materials • Many opinions of performance • Reviewing data and running some basic observations

  11. 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 Thanks for your attention

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