The patented technology allows lower CO2 emissions in the cement production process and uses CO2 in precast concrete manufacturing. Lafarge claims that it reduces the carbon footprint of the end-to-end process by up to 70%.
Under the terms of the agreement, Lafarge will have the right to commercialise the technology worldwide. It will offer a complete system of sustainable cement and CO2-cured concrete in partnership with Solidia.
Solidia has developed a new binder made from similar raw materials to Ordinary Portland Cement (OPC) and produced in a traditional rotary kiln. It is produced at lower temperatures and through a different chemical reaction that generates less CO2.
When used in the manufacture of precast concrete, Solidia Cement hardens through the addition and absorption of CO2 in a patented curing process that is said to reduce the overall carbon footprint by up to 70%.
Lafarge has collaborated with Solidia Technologies since 2013 to industrialise this technology. The two companies worked together to demonstrate the feasibility of commercial-scale production in a conventional cement plant. In April 2014, a joint group of Lafarge and Solidia scientists validated the reduced carbon footprint and commercial viability of Solidia cement during a full-scale trial at Lafarge's Whitehall cement plant in the USA. The cement produced has subsequently been used by a variety of precast customers in North America and Europe to further validate the curing technology and to produce blocks, pavers and roof tiles for commercial testing.