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GAUTRANS APT

GAUTRANS APT. ELZBIETA SADZIK MAY 2002. SPECIFICATIONS FOR HVS MARK III AND MARK IV. COST BENEFIT: HVS III vs HVS IV. 57% Decrease in total production cost 50 % Increase in production 19% Decrease in Fuel consumption 56% Decrease in down time. Comparative Cost: HVS III vs HVS IV.

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GAUTRANS APT

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  1. GAUTRANS APT ELZBIETA SADZIK MAY 2002

  2. SPECIFICATIONS FOR HVS MARK III AND MARK IV

  3. COST BENEFIT: HVS III vs HVS IV • 57% Decrease in total production cost • 50 % Increase in production • 19% Decrease in Fuel consumption • 56% Decrease in down time

  4. Comparative Cost: HVS III vs HVS IV • HVS Mk III: 80 cents/load repetition • HVS Mk IV+: 50 cents/load repetition

  5. HVS testing sites

  6. Testing subjects

  7. HVS accompanied tests • Laboratory • Standard laboratory • Grading, Atterberg, OMC/MDD (untreated) • CBR, UCS, ITS • Advanced laboratory • Flexural beam test (FBT) • Static and dynamic triaxial (STT and DTT) • Durability • Permeability • Wheel-tracking erosion (WTE) and mechanical brush (MBT)

  8. HVS accompanied tests • Field • HVS • Material characterisation • Field moisture and density, environmental data • Dynamic Cone Penetrometer (DCP) • Deflection, permanent deformation and rut • LTPP • Visual evaluation • Deflections • Traffic survey

  9. Test matrix for foam-treated material

  10. Test matrix foremulsion-treated material

  11. HVS management Steering Committee Scope Prioritisation Needs Technical management Guidelines Proposals Reports Technical panel Review Pool

  12. Issues discussed • Unanimous agreement on historical benefit of HVS research for pavement engineering in South Africa and a need to continue • Needs identified: • Long-term research objective • Ad hoc needs (proof testing)

  13. “Steering Committee” identified needs • Cold-mix recycling • Rut-resistant solutions • Ultra-thin & thin concrete layers • Appropriate asphalt overlays & seals • New cement / high UCS layers

  14. “Steering Committee” identified needs • Composite pavements • Cost-effective solutions for low-volume roads • Risk assessment & management • Vehicle-pavement interaction

  15. Proposal • It is proposed that an APT Steering Committee be established as a sub-committee of the RPF

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