Cements containing supplementary cementitious materials contribute to the reduction of CO2 emissions due to their lower content of Portland cement clinker compared to ordinary Portland cements. These lower clinker contents usually result in lower early strengths. Due to their slower strength development the usability of these cements is limited for certain applications.
The (early) strength of cements can be increased by the addition of certain materials. Even though the usage of some of these materials as minor cement constituents might be possible and reasonable from a technical and economical point of view, it is currently excluded acc. EN 197-1. The main scope of this research project was to supply evidence that selected inorganic substances are suitable for the use as minor constituents.