Granularity of materials

thumb|upright=1.25|Surface-water-Gley soil|gley developed in [[glacial till in Northern Ireland]]

thumb|upright=1.35|Close view of pebbles

thumb|right|Iron powder|alt=A small canister of metallic powder A powder is a dry solid composed of many very fine particles that may flow freely when shaken or tilted. Powders are a special sub-class of granular materials, although the terms powder and granular are sometimes used to distinguish separate classes of material. In particular, powders refer to those granular materials that have the finer grain sizes, and that therefore have a greater tendency to form clumps when flowing. Granulars refer to the coarser granular materials that do not tend to form clumps except when wet.

artificial gravel of angular shape, used as construction aggregate

inert material with sufficient compressive strength and appropriate size distribution added as load to a composite

conglomeration of discrete solid, macroscopic particles

broad category of coarse particulate material used in construction

Granulation is the process of forming grains or granules from a powdery or solid substance, producing a granular material. It is applied in several technological processes in the chemical and pharmaceutical industries. Typically, granulation involves agglomeration of fine particles into larger granules, typically of size range between 0.2 and 4.0 mm depending on their subsequent use. Less commonly, it involves shredding or grinding solid material into finer granules or pellets.

phenomenon where granular material subjected to shaking will exhibit circulation patterns

a rock larger than a pebble and smaller than a boulder

ratio of grain collision stresses to viscous fluid stresses

packing method for objects

conjectural soil type probably not found in nature