In these mixes, we replace a portion of cement with either slag, a waste product from steel mills, or fly ash, produced by power plants. Now, let’s see some examples.īack in 2019 in Sweden, Skanska Betong (our concrete development company) launched a collection of low-carbon mixes. It may pose some technical limitations to usage but with the appropriate expertise and planning, it can be used in ways analogous to standard concrete. Data collected in Skanska and partner studies show that the use of these materials has reduced carbon emissions by up to 40-50 percent over conventional concrete. At Skanska, we have already been testing and using different types of low-carbon concretes in projects around the world, either our own innovations or materials from our business partners.