efflorescence

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Related to efflorescent: deliquescent

efflorescence:

see hydratehydrate
, chemical compound that contains water. A common hydrate is the familiar blue vitriol, a crystalline form of cupric sulfate. Chemically, it is cupric sulfate pentahydrate, CuSO4·5H2O.
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The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved. www.cc.columbia.edu/cu/cup/

Efflorescence

A deposit, usually white, formed on the surface of a brick, block, or concrete wall; it consists of salts leached from the surface of the wall.
Illustrated Dictionary of Architecture Copyright © 2012, 2002, 1998 by The McGraw-Hill Companies, Inc. All rights reserved

efflorescence

[‚ef·lə′res·əns]
(botany)
The period or process of flowering.
(chemistry)
The property of hydrated crystals to lose water of hydration and crumble when exposed to air.
(materials)
A crust of salts, usually white, that forms on the surface of stone, brick, plaster, or mortar because of leaching of free alkalies from adjacent concrete or mortar.
(mineralogy)
A whitish powder, consisting of one or several minerals produced as an encrustation on the surface of a rock in an arid region. Also known as bloom.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

efflorescence

An encrustation of soluble salts, commonly white, deposited on the surface of stone, brick, plaster, or mortar; usually caused by free alkalies leached from mortar or adjacent concrete as moisture moves through it.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.

efflorescence

1. Chem Geology
a. the process of efflorescing
b. the powdery substance formed as a result of this process, esp on the surface of rocks
2. any skin rash or eruption
Collins Discovery Encyclopedia, 1st edition © HarperCollins Publishers 2005
References in periodicals archive ?
There have been collapses of rock with varying degrees of efflorescent oxidation.
This dip angle anomaly in the coal seam is the result of efflorescent oxidation and nearby faults.
The number 39107 auxiliary roadway was built along the number 9 coal seam, which encompasses a large shallow efflorescent oxidation zone and is 1230 m long, 5.0 m wide, and 3.5 m higL
During roadway excavation in the efflorescent oxidation zone, cracks developed, the roof collapsed, and the bolts could not be used.
Range of Efflorescent Oxidation and the Roof Rock Integrity.
At depth, efflorescent oxidation of the #9 coal seam is significant, and the degree of oxidation diminishes toward the surface.
(2) The roof of the roadway in the efflorescent oxidation zone is shown in Figure 5.
(1) Water content of the slate layer in the upper efflorescent oxidation zone reaches 32.27%, indicating significant efflorescent oxidisation.
Influence of Efflorescent Oxidation on Surrounding Rock Stability.
The deformation mechanisms of fractured rock in an efflorescent oxidation zone were investigated using the DEM.
Duan, "Study on the law of coal layer safe extraction in efflorescent oxygenized belts," Journal of China Coal Society, vol.
Yu, "Research of coal layer safe extraction in efflorescent oxygenized belts," Journal of China University of Mining and Technology, vol.