APT Steering Committee

1
APT Steering Committee
Road Pavement Forum 11 May 2005 Elzbieta Sadzik
2
HVS Programme

• Recent work related to management
• Gautrans APT Strategic Plan 2004 2007
• Quantification of HVS benefits
• Methodology
• Pilot assessment (G1 base)
• Summary of HVS testing since 1995
• QMS for HVS operation (ISO 9001)
• Procedures / protocols / records
• Task / responsibility matrix

3
APT Strategic Plan 2004 - 2007

• Priority Research Areas
• Cold Recycling H Theyse
• Asphalt performance B Verhaeghe
• Vehicle-pavement interaction (VPI) W Steyn
• Low volume roads L Sampson
• Concrete pavements B Perrie

4
Strategic Plan 2004 2007

• APT action plan
• Performance of Hot Mix Asphalt
• Development of a product certification system for
  the evaluation of fitness-for purpose of
  proprietary ultra-thin asphalt wearing courses
  and

5
Strategic Plan 2004 2007

• APT action plan
• Performance of Hot Mix Asphalt
• The validation of the South African HMA design
  and development of specifications.

6
Strategic Plan 2004 2007

• APT action plan (cont)
• Improved understanding of vehicle contact
  stresses and strains, pavement inter-action

7
APT Strategic Plan 2004 2007

• HVS action plan for next 3 years
• Build SIM facilities at Gautrans
• Conduct SIM measurements
• Identify and test sections to establish
  procedures for design, construction and
  performance criteria for certification of
  ultra-thin asphalt wearing courses

8
Pavement-vehicle interaction

• HVS
• SIM testing

9
APT Strategic Plan 2004 2007

• HVS action plan for next 3 years (cont)
• Identify and construct test sections for the
  validation of the HMA design.
• Conduct HVS tests and laboratory investigation to
  provide inputs into improved HMA design
  procedures and performance models
• Monitor LTPP sections

10
HVS Programme

• Laboratory investigations
• Compaction potential of foam and emulsion treated
  materials Cold recycling
• Property of emulsion treated crushed stone and
  aeolian sand - Cold recycling
• Accelerated curing methods for foam and emulsion
  treated materials - Cold recycling

11
Progress Report OnHVS Testing
12
APT Steering Committee

• Future work
• Review of pavement design methods
• SA mechanistic- empirical method
• Use of deflection measurements
• Incorporation of realistic load and contact
  stresses
• Revision of TG2
• Guidelines for ET materials

13
APT Steering Committee

• Resolutions
• To form a task group to give direction to the
  revision of pavement design methods
• To reactivate the task on ET and FTB

14
APT Steering Committee

• HVS International Alliance
• Next meeting 24th till 26th August 2005

15
APT Steering Committee

• Dissemination of information
• HVS news letter
• Website www.gautrans-hvs.co.za
• Evaluation of APT steering committee
  questionnaire
• Permission to use e-mail

16

• Thank you