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.

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.

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.

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
References in periodicals archive ?
be tough white efflorescence black tiles Ken Franklin, via email I'VE never heard of this.
It's difficult to stop water infiltration until the actual source is identified, so it's important to understand the root cause of efflorescence.
Figure 4 illustrates the elegant solution to the problem of efflorescence, subflorescence and spalling courtesy of a long-dead Old World mason.
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.
Masonry, surfaces should be inspected for efflorescence (deposited salts), indicating water entry through the foundation.
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.
On exterior surfaces, efflorescence is usually only of aesthetic concern.
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.
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.
Even at this stage of what promises to be a long project, Pettegree is ready to conclude that the early efflorescence of Huguenot literature was rapidly and definitively eclipsed by the Catholic response.