Sand

sand

1. loose material consisting of rock or mineral grains, esp rounded grains of quartz, between 0.05 and 2 mm in diameter

2. a sandy area, esp on the seashore or in a desert

3. a greyish-yellow colour

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Sand

George , pen name of Amandine Aurore Lucie Dupin. 1804--76, French novelist, best known for such pastoral novels as La Mare au diable (1846) and François le Champi (1847--48) and for her works for women's rights to independence

Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005

What does it mean when you dream about sand?

A dream about sand might relate to pleasant memories of being at the beach. Alternatively, sand can represent time—as in “the sands of time”—or the insecurity of building one’s house in the sand. Sand is also associated with deserts and the lack of nourishing water. (See also Beach, Desert).

The Dream Encyclopedia, Second Edition © 2009 Visible Ink Press®. All rights reserved.

sand

[sand]

(geology)

Unconsolidated granular material consisting of mineral, rock, or biological fragments between 63 micrometers and 2 millimeters in diameter, usually produced primarily by the chemical or mechanical breakdown of older source rocks, but may also be formed by the direct chemical precipitation of mineral grains or by biological processes.

McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

sand

sanctus bell

1. Granular material which passes through a 9.51-µ (?-in.) sieve, almost entirely passes through a 4.76-mm (No. 4) sieve, and is predominantly retained on a 74-µ (No. 200) sieve; results from natural disintegration and abrasion of rock or processing of completely friable sandstone.

2. That portion of an aggregate passing through a 4.76-mm (No. 4) sieve and predominantly retained on a 74-µ (No. 200) sieve. Also see sieve number.

McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Sand

 

small fragments of loose sedimentary rock or contemporary sediment. Sand consists of round and angular grains of various minerals and rock fragments ranging from 0.1 to 1 mm (from 0.05 to 2 mm or larger, according to other classifications). It also has admixtures of silt (aleurite) and clay particles.

Sand may be designated by its origin as river, lake, sea, fluvioglacial, or eolian sand. In terms of mineralogical composition the most common sands are quartz, glauconite-quartz, feldspar-quartz, and mica sands. Sand may contain valuable minerals— gold, platinum, diamonds, sapphires, rubies, zircon, rutile, sphene, and ilmenite—some of which are extracted. Both natural sand and man-made sand, produced by crushing rock, are used in construction and in the building-materials industry. Quartz sand is used as a raw material in making glass, as a component in manufacturing porcelain, earthenware, and construction ceramics, and as material for making casting molds. The quality of sand is determined by the size of its grains, its mineralogical composition, and the amount of impurities.

Sorted sand must have a strictly regulated grain composition. Natural sand is usually supplied in two grades: large (5–0.63 and 5–1.25 mm) and small (1.25–0.14 and 0.63–0.14 mm). Impurities may not exceed 2 percent. There are two grades of crushed sand, 800 and 400, depending on the strength of the original rock.

REFERENCES

Fadeev, P. I. Peski SSSR, part 1. Moscow, 1951.
Trebovaniia promyshlennosti k kachestvu mineral’nogo syr’ia, 2nd ed., issues 2, 29, 74. Moscow, 1959–63.
Grauvakki. Moscow, 1972.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.