fine admixture

fine admixture

[¦fīn ′ad‚miks·chər]
(geology)
The smaller size grades of a sediment of mixed size grades.
References in periodicals archive ?
For this study we considered 4 fine admixtures (3 kinds of limestone different by their smoothness, one quartz) and one ultra-fine admixture (silica fume) currently used for new concretes in developed countries (Table 3).
Then, for the mortars with the fine admixtures, it is more or less close to that of the mortar of reference and it is more important as the smoothness is large but remains weaker for rates of substitution lower than 18%.
However, the influence of fine admixtures on increasing the permeability of concretes for water remains disputable with a view to their puzzolana reaction contributing rather to decreasing the capillarity of concrete.