Cement

Our Island's homes, offices and buildings are mostly made of concrete, making concrete the second most used material in Jersey after drinking water.

Local trends such as uncontrolled population growth and urbanisation are colliding to increase the unprecedented growth of buildings in Jersey and the increased use of concrete. If concrete was bread, cement would be the flour needed to make the bread. Cement is mined limestone - heated in a rotary kiln split in two halves - clinker and CO2 the two products; cement production alone is responsible for 5-8% of all global emissions.

Options like hempcrete for all above gound construction should be considered.

Concrete that has captured carbon should be preferred choice for subteranial designs.

All planning applications should consist of a residual and energy carbon emissions statement.

Why the contribution is important

Keeping CO2 emissions within the 2 - 1.5 target, using concreate as we do today is not achievable.

Jersey has to brake its link between the use of concrete and CO2 emissions.

It will be impossible to meet out NET Zero ambition while concrete remains the favoured choice for buildings.

by Gordon on February 12, 2021 at 04:43PM

Current Rating

Average rating: 4.5
Based on: 4 votes

Comments

  • Posted by antonygibb February 14, 2021 at 19:05

    The embodied carbon in construction materials is a key part of the whole process. It takes somewhere between 20 and 60 years (it's difficult to calculate as there is not yet an agreed international standard for embodied carbon in building materials) for a new building to reach net zero through less carbon intensive running costs. If you add the demolition of a building already on a site, that adds more embodied carbon in the materials removed, transported and landfilled. Retrofit is consequently the most effective ay of reducing the carbon cost of construction: it takes about 10 times more CO2 equivalent to build new as it does to retrofit.
  • Posted by Gordon February 15, 2021 at 21:59

    Before the new occupants set their first step into a new build 50% of the buildings carbon responsibility has polluted the atmosphere.
    If the planning panel judged the value of any new build on its residual carbon energy responsibility, less environmentally destructive buildings would be built.
  • Posted by greybeard February 19, 2021 at 14:03

    Other countries use sustainably grown wood as a building material - perhaps this should be considered more often?
  • Posted by Gordon February 22, 2021 at 22:43

    Only works below ground level should be concrete with entombed carbon
    All works above ground should be made of carbon negative products like hempcrete.
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