Relationship between particle size distribution and compressive strength in portland cement

Abstract We have studied the relations between particle size distribution at equal specific surface area and compressive strength in Portland cement. Starting from a series of hypotheses, we have demonstrated that the volume of hydrated product, therefore the mechanical strength, increases when the granulometric range decreases. The experimental data have demonstrated that the depth of hydration depends mostly on the particle size, contrary to our hypothesis. Nevertheless, we have proved that when with the actual plants of grinding it is possible to minimize the width of granulometric range, the mechanical strength of Portland cements both in Rilem mortar and in concrete can be maximized.