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» Environmental business risks facing road industry » Impacts of government policies and legislation » RTA’s framework of sustainability » Reducing pavement carbon emissions » RTA Specifications: Implementation » Case Studies

Jim Grove (Federal Highway Administration), Dr Jim Cable (Cable Concrete Consultation) and Dr Peter Taylor (National Concrete Pavement Technology Centre) present on improving concrete patching practices. Areas covered included: Strength focus - are we neglecting durability Why do we patch? How long should a patch last? Opening strength requirements Thickness...

David Dash presents on tye road noise for concrete pavements. His presentation covers: Understanding noise: Pressure/power Frequency Filters Measurement and standards Noise spectra Recent results for varying pavement types Concluding that negative texture, such as that achieved via diamond grinding and longitudinal tyning may be preferable for concrete pavements.

The presentation on Cold Weather Paving contains research information which is not yet approved for release. We hope to be able to load that presentation in the near future

A brief analysis of current MoDOT specified limits on gradations was undertaken. Depending on which side (fine or coarse) the gradations were running in relation to the limits, various combinations of sand and coarse aggregates A, B or D were all over the Coarseness Factor chart, with behaviour ranging from...

This forum addressed both concrete road pavements & concrete industrial pavements. Presentations made addressed concrete mix designs, design & construction aspects, as well as current information about diamond grinding of concrete road pavements in Australia. The video demonstrates the use of an innovative machine to effect concrete pavement jointing.

This forum addressed both concrete road pavements & concrete industrial pavements. Presentations made addressed concrete mix designs, design & construction aspects, as well as current information about diamond grinding of concrete road pavements in Australia. New developments in concrete mix design: • Sands have become finer with a gap between...

This forum addressed both concrete road pavements & concrete industrial pavements. Presentations made addressed concrete mix designs, design & construction aspects, as well as current information about diamond grinding of concrete road pavements in Australia. Good Concrete Mix Design: •Understand requirements of the concrete. •Identify if an existing mix may...

This forum addressed both concrete road pavements & concrete industrial pavements. Presentations made addressed concrete mix designs, design & construction aspects, as well as current information about diamond grinding of concrete road pavements in Australia. Presentation by David Dash covers: equipment and components used for diamond grinding United States practices...

The presentation by Arvo Tinni provides worked examples of fuel efficiency savings with reduced roughness. The basis of the presentation is an ARRB Research Report ARR31, which is based on 7 prior studies. Concluding that a unit change in IRI has an average change in fuel consumption of 1%. The...

Arvo Tinni's presentation references a 2008 Canadian study by the National Research Council, Centre for Surface Transportation Technology. A comparative study of three pavement types - concrete, asphalt and composite. Reported truck fuel savings of 1.8% and 3% at 100km/hr and 60km/hr respectively for concrete when compared with the next...

Causes of roughness IRI Roughness testing methods Bump car Walking profilometer