Performance indicator: Waste Minimisation
Waste to landfill as a proportion of production output (kg/tonne)
The indicator for waste minimisation relates to waste disposed to landfill per tonne of concrete production and includes waste related to the constituent materials attributed by their proportion in the concrete. During 2015, the value was 1.1 kg/tonne of concrete produced, performance similar to 2014.
The equivalent value for concrete + reinforcement is 1.2kg/tonne.
The 2020 target is a 90% reduction from the 2008 baseline, equivalent to 500g (0.5kg) of waste per tonne of concrete produced. Our longer-term aspiration is for zero waste to landfill.
A precast factory changed the procurement process, storage, handling and automatic mixing of epoxy resin used in the production of concrete rail bearers. This change resulted in the elimination of 30 tonnes of hazardous waste per annum and a significant reduction in the use and wastage of epoxy resin and related packaging.
Net waste consumption ratio
* materials diverted from the waste stream for use as a fuel source are not included in the ratio until 2011.
The net waste consumption ratio gives an overall indicator for the inductry's use of waste and by productsrelative to its own waste to landfill, specifically:
Waste and by-products used in concrete manufacture + materials diverted from the waste stream for use as fuels.
Waste to landfill generated by concrete production and its constituent materials.
In 2015, concrete was a net user of waste, consuming 99 times more recovered and waste materials than the waste it sent to landfill.
Performance indicator: Replacement of fossil fuels
Material diverted from the waste stream for use as a fuel source, as a percentage of total energy use
The industry requires high temperatures for production, primarily in cement manufacture, and this is an opportunity to safely utilise alternative combustible materials as fuel instead of non-renewable fossil fuels. Where fuels used are recognised as carbon neutral under EU Emissions Trading Scheme (EU ETS), this has the additional benefit of reducing the embodied carbon of cement.
The concrete industry indicator shows the proportion of energy derived from materials diverted from the waste stream as a percentage of total energy use. In 2015, 32.5% of total energy use was from waste-derived fuels. The 2020 target is to increase this to 50%.
These indicators are part of the Waste section of the report and 2020 Commitments. An update on our Waste 2020 Commitments.