Cement, the main raw material in concrete, is produced through a thermal process in which CO2 emissions are generated in two ways in equal measure: first as a result of the combustion of the fuel used in the process, and second as a result of the firing of the limestone, the main ingredient of concrete, which emits a large amount of CO2 during its calcination process.
We in the ceramics industry know very well that the cement industry also generates emissions in a third way: as a result of the low thermal insulation efficiency of concrete blocks (in comparison to ceramic blocks), which generates a greater energy expenditure in heating spaces.
It is difficult to replace cement and concrete in some of their applications, such as in the building of infrastructure (bridges, tunnels, large structures, etc.). However, there is an obvious substitute for concrete blocks which generates far lower emissions both during production and during its application and life cycle: ceramic blocks. Something that should be common knowledge when talking about the world’s CO2 emissions.