In the large majority of blended cements initial lower strengths can be observed compared to the parent Portland cement. However, especially in the case of pozzolans finer than the Portland cement, the decrease in early strength is usually less than what can be expected based on the dilution factor.
In blended cements, initial lower strengths are frequently observed compared to parent Portland cement. However, especially in cases involving pozzolans finer than Portland cement, the reduction in early strength is often less than anticipated based on dilution factor.