Tensar TriAx Carbon Calculator

Over recent years, there has been increased concern over rising CO₂ emissions worldwide. In response to this, the UK government has committed to reducing CO₂ emissions by 20% in real terms by 2010. Since 2007, the UK government’s planning policy statement states that the design of any future development should be planned to limit CO₂ emissions.

The Tensar Carbon Calculator estimates the percentage CO₂ saving by using Tensar TriAx geogrid in a mechanically stabilised layer when compared to the construction of an unstabilised road foundation. This saving is due to the Tensar mechanically stabilised layer enabling a lesser thickness of aggregate to be used for the construction of the road foundation.

The use of Tensar TriAx geogrids within a mechanically stabilised layer enables reductions in aggregate layer thickness, therefore

•reducing the quantities of natural aggregates used
•reducing the volume of material to be excavated
•reducing the number of vehicles visiting the site

All of these reductions enable a saving in CO₂ emissions.

Taking into consideration the carbon cost of manufacturing Tensar TriAx geogrids and delivering the geogrids to site, the Tensar Carbon Calculator works out the potential savings in materials and transport when using TriAx geogrid in a mechanically stabilised layer. Savings in CO₂ emissions of up to 50% can be achieved when compared with an unstabilised road foundation.

The calculator has been developed and checked by Coffey Geotechnics.

There are several documents associated to the use of this calculator and these can be seen below:

• Assumptions
• IB_CO₂

Tensar have developed several Carbon Calculators for the countries listed below:

• UK and Ireland - http://www.tensarsustain.co.uk
• South Africa - http://www.tensarsustain.co.za/
• Spain - http://www.tensar.es/sostenibilidad/
• Australia - http://www.tensarsustain.com.au/
• Norway - http://www.tensarco2kalk.no/
• New Zealand - http://www.tensarsustain.co.nz/