Granulometric Composition

Granulometric Composition


the content of granules of varying size in rock, soil, or an artificial product, expressed as a percentage of the bulk or of the quantity of granules of the examined sample.

The granulometric composition is an important indicator of the physical properties and structure of a natural or artificial material. Depending upon the research purpose, the granulometric composition can be determined with a varying degree of detail. There is no generally accepted classification for the data of granulometric composition, and this is due to the differing purposes and objects for which the granulometric composition is determined. In geology (lithology), pedology, marine geology, and in technology (abrasives and the dressing of minerals) there are special classifications and names of the granulometric fractions. Thus, in sedimentary rock, the categories are large boulders, over 500 mm; medium-sized boulders, 500–250 mm; small boulders, 250–100 mm; pebbles. 100–10 mm; large gravel, 10–5 mm; small gravel, 5–2 mm; coarse sand, 2–1 mm; large sand, 1–0.5 mm; medium sand, 0.5–0.25 mm; fine sand, 0.25–0.10 mm; silt, 0.10–0.05 mm; dust, 0.05–0.005 mm; and clay, less than 0.005 mm.

The granulometric composition is determined by using granulometric analysis (granulometry). Determining the granulometric composition of fragmentary rock is essential forjudging the rock’s reservoir properties and for discovering under what conditions the rock was formed. The granulometric composition of ground makes it possible to judge its technical properties for construction purposes, while the granulometric composition of soils makes it possible to determine their structural features, which to a significant degree determine soil fertility.


References in periodicals archive ?
granulometric composition, mm fraction - 1 mm more than 90% fraction + 1 mm less than 10 % fraction + 3 mm less than 5% insoluble residue less than 7% it is not allowed to have burned lime with inclusions of dark gray agglomerates.
Clam distribution was analyzed along a 32 km coastal fringe whose granulometric composition varies from very fine to coarse sand.
Experimental research on influence of granulometric composition on sandy soil strength and reological properties, EJGE 18: 4081-4091.
At the same time, the regulatory requirements for crumb rubber used for modification of asphalt concrete mixes specify only requirements for granulometric composition (no more than 20% larger than 0.
Soil horizons are heterogeneously different in granulometric composition.
Granulometric composition of such clay is presented in Table 2.
The granulometric composition of the sediment, more heterogeneous in the Saraiva and Jacare lakes, providing diversity of habitat, may also explain the higher species diversity and the dominance of Tubificidae that present detritivorous species, typical of sediment.
Granulometric composition of aggregates Sum of the passing particles, % Dimensions 0/2 fracture 0/2 fracture 5/8 fracture of sieve sand granite granite holes, mm screenings rubble 11.
Sand was characterized by granulometric composition tests, characteristic maximum size (CMS), fineness, specific gravity, unit mass and swelling coefficient, according to ABNT standards (Table 3).
With the aim of additional degasation of metal, stabilization of its structure, and correction of the granulometric composition, the impact of thermal treatment at temperatures 1173, 1273, and 1373 K under vacuum was studied.
We collected samples of sediment in triplicate from each lake, using them to determine the granulometric composition and the percentage of organic matter in the sediment (Allen, 1989).