Over the last decades, the global focus on CO2 emissions and climate change has interested also cement based building materials.
Supplementary cementitious materials (SCM) are used in concrete as a rapid countermeasure to replace Portland cement (PC) and to significantly reduce the CO2 emissions. SCM can be of different nature. They can come from industrial manufacturing as by-products (residual sources), e.g. slags or fly ashes, or from natural sources, e.g. clays and natural pozzolans