Resource efficiency
Green concretes with limestone powder
![Global warming potential [kg CO2 equiv] and compression strength [N/mm²] of studied concretes with different cement compositions and w/c-ratios](https://www.bft-international.com/imgs/1/3/9/7/0/9/0/1_4_Rezvani_Abb-a67d8c0451c592cd.jpeg)
On a global scale, concrete and cement production accounts for more than 6 % of anthropogenic CO2 emissions. Substitution of the cement clinker (K) contained in the cement or concrete by appropriate alternative materials can thus significantly reduce the global warming potential. Owing to their commercial, technical and environmental benefits, blast-furnace slag and hard-coal fly ash are currently used as the main alternative cement constituents or concrete admixtures in Germany. However, these materials are available only in limited quantities, which is why it is not possible to considerably...
