Using an award-winning, patented process known as Accelerated Carbonation Technology (ACT), we chemically transform thermal residues, such as Air Pollution Control residues (APCr) from Energy from Waste (EfW) facilities into a high quality, lightweight secondary aggregate.
Gaseous carbon dioxide is injected into the thermal residue to accelerate the cementation process, forming calcium carbonate – or limestone as it is more commonly known. This forms a rounded aggregate which is then screened and stored.
Because the process permanently captures more carbon dioxide than is associated with the production cycle, it creates a genuinely carbon negative product.
This aggregate has proven to be very popular with block makers and within the wider construction industry, both of whom are keen to find sustainable alternatives to natural aggregates.
Our carbon negative aggregate is ideal for usage in medium density concrete blocks and many other applications. These products have now been used in a number of signature buildings.
We are also able to supply special “eco blends” made from carbon negative aggregate and natural aggregate.