A most interesting forum looking at sustainability issues with overseas reports, status of RTA NSW on sustainable roads, a presentation from the Australian Green Infrastructure Council, information from the cement industry on the effects of a carbon trading scheme, and recent research on manufactured sands.
Carbon Trading Scheme – effect on cement Sustainable Concrete Road Pavements
The RTA’s Move Towards Sustainable Construction Practices
» 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
Tyre Road Noise in Concrete Pavements
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.
Effect of pavement roughness on fuel consumption
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...
Concrete roads save fuel – 2008 Canadian Study
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...
How to reduce Tire (Tyre)-Pavement Noise
CP Tech Center Investigates Surface TextureThe National Concrete Pavement Technology Center (CP Tech Center) is currently working with the U.S. Federal Highway Administration (FHWA) and seven State DOTs on Part 3 of a three-part program to examine tire-pavement noise on concrete pavement. The initial activity involved the development of a...
The Advantages of Furnace Bottom Ash Products in Providing Pavement Ground support in Soft Soils and Wet Weather.
With more concrete pavements being constructed over soft soil foundations, the use of coal combustion products, such as furnace (bottom) ash, to provide bridging of soft areas and reduced construction risk by being able to be placed insitu in wet weather, becomes more critical. The use of such materials in...
Skid Resistance of Concrete Pavements and their Durability
The article states that a relative traffic accident risk depends on the values of skid resistance and its durability, which are both influenced by the texturing of Concrete pavements (CP). From the very beginning of the CP construction in the Czech Republic, transverse tining was used for surface texturing. The...
Determination of the Behavior of on Site Pavement Recycling with Cement
On site pavement recycling with cement is the most sustainable restoration technique, by means of which a degraded pavement is transformed into a consistent and more homogeneous structure, using the road as a source of aggregates. Both bearing capacity and homogeneity are therefore considerably improved. Due to the absence of...
Skid Resistance Properties of Concrete Pavement Surfaces in Tunnels
Skid resistance properties of concrete pavement surfaces in tunnels are measured with the dynamic measuring device TRT on a regular basis in the Czech Republic. Measurements are usually carried out before and after putting the tunnel into operation and then approximately once a year; the skid resistance is also measured...
Re-use of Marginal Aggregates in Cement Bound Mixtures for Pavement Foundations
The paper reports the results of an experimental study aimed at designing cement bound granular mixtures for pavement foundations, made exclusively with marginal materials, namely electric arc furnace steel slags, ladle furnace slags, waste foundry sands, glass wastes and coal ashes, used with different proportions. The laboratory investigation has been...
Super Fast Concrete Repair System for Roads Airfields and Railways Based on a Special Cement for Infrastructure Projects
From both an environmental and economic point of view, the availability and performance capability of infrastructure traffic areas today and in the future is of the highest priority. This applies to both public and private roads and air traffic areas, as well as for busy parking and logistics areas and...