This article concerns the influence of the physical characteristics of 18 fine mineral additions on water requirement, agglomeration and packing density of pastes. The main objective is to determine the principal parameters control- ling their use in concrete mixtures. A standard Vicat test and, a new and simple test based on agglomeration of fine particles by capillary forces of a water drop, are used to determine the water requirement and the packing density. The influence of high-range water-reducing admixture is also studied. Results show that fine mineral additions Unfavourably influence the water requirement and the packing density of cement mixtures in two cases.
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