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.

V. A. GROSSGEIM

References in periodicals archive ?
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.
Granulometric composition of such clay is presented in Table 2.
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.
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.
In order to determine thermodynamical and mechanical characteristics of formed materials, the samples of material with different amount of binder, different structure, different densities and using 3 different granulometric composition cardboard milling refuse were prepared.
At the initial stage automobile roads were mainly ground ones, then the ground ones with fitted granulometric composition, gravel, clinker and others.
Chemical and granulometric composition of powdered aluminium and metallic calcium chips used in the pilot and full scale meltings is given in Table 2.
Probably, there was difference in granulometric composition of the brazing alloy or in the conditions of the brazing mixtures producing in brazing of different specimens.
Apparently the fly ash content depends on fuel granulometric composition, first of all on the dust content.
The high flowability of the powder is mainly conditioned by the oval form granulometric composition of the particles.