Mineral Products Association (MPA), Ricardo, Heriot-Watt University
The programme aims to provide a model to quantify the CO2 sequestered by concrete in the UK built environment so that this important CO2 sink can be included in the UK National Inventory Report (NIR). It will improve understanding and quality of historic emissions, reduce uncertainties in emissions estimates, and improve the UK ability to assess progress towards international and national targets.
Carbonation is a slow process where concrete absorbs CO2 from the atmosphere throughout its lifetime. It is essentially a reversal of the chemical reaction that occurs when cement is produced and CO2 is released from calcium carbonate raw materials when they are heated to volcanic temperatures (these emissions are known as process emissions).
Carbonation of concrete is a process by which carbon dioxide from the air penetrates into concrete through pores and reacts with calcium hydroxide to form calcium carbonates
Ca(OH)2 + CO2 → CaCO3 + H2O
The Intergovernmental Panel on Climate Change (IPCC) recognizes that carbonation happens in concrete and that it is an important carbon sink. However, there is limited international literature on the process and no formal IPCC method of calculation. Some initial methods of calculation have been development by IVL (the Swedish Environmental Research Institute) using Swedish data and reflecting national circumstances in Sweden.
The Project will:
This project was part funded by BEIS through the annual inventory improvement programme that commissions research and development projects to improve and develop the NAEI (National Atmospheric Emission Inventory).
MPA Cement is part of the Mineral Products Association, the trade association for the aggregates, asphalt, cement, concrete, dimension stone, lime, mortar and silica sand industries.
MPA Cement, Gillingham House, 38-44 Gillingham Street, London SW1V 1HU
T: 0207 963 8000