efflorescence


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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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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 ?
Efflorescence is usually easily removed by brushing it off with a stiff brush.
A benchmark study involving market leading competitive binders shows (Figure 16) that the novel polymer outperforms in DPUR, leaching resistance, tannin blocking, efflorescence resistance, scrub resistance, corrosion resistance, gloss retention, and tint strength.
Yet, Ober argues, the Hellenistic period was the highpoint of the efflorescence, even if democracy in city-states had fallen either to new tyrants and warlords or to the reasserted Persian Empire.
Very few researchers have addressed the problem of efflorescence in metakaolin cement-based composites.
The joints on the downstream face of the dam were cleaned of the efflorescence, and the leaks that were covered by the crystallization crust were located, cleaned, and sealed.
Concrete block and poured concrete foundations should be tighter, particularly if coated on the exterior, but water stains on the concrete and around foundation windows, along with efflorescence, are signs of water entry.
It is as if the problem were, to put it in plain terms, if Islam was responsible for the glory of medieval Islamic civilization and the emergence of hundreds of scientists who taught not only Muslims but also Europeans, then why is the same Islam not creating the same circumstances of scientific efflorescence today (or, to put the second question negatively, why is Islam responsible for the decay and scientific backwardness that one sees today in the Islamic world).
(4) It is one thing to deny that the Revolution was made by a bourgeoisie to clear the way for the efflorescence of capitalism, but it is another to deny the very existence of a bourgeoisie, understood as a relatively comfortable urban group without privileges.
Known as efflorescence, bloom, or effervescence, it appears when water that containing soluble salts evaporates from the surface of an object.
Fled is the efflorescence of song as worlds mourn, gone is the rhapsodizing of love as the cold congregation of seasons clusters, huddles together to unveil monuments of memory that scorn sallies of moving language other than the old kaddish that draws a torrent of tears in puddles.
While noting that "poetry is easier to understand if you have a head of poetry, just like a country needs a leader," he spies something else at work behind the efflorescence. "Laureateship is part of our fascination with things British, like the Burberry trench coat," he says.
With a bit of inspiration garnered at the Royal Horticultural Society's dry garden at Hyde Hall in Essex, more efflorescence emerges from the dreaded shingle as this new series gets off to an unusual start.