efflorescenceˌɛf ləˈrɛs əns
efflorescence (n)
- plural
- efflorescences
English Definitions:
flower, prime, peak, heyday, bloom, blossom, efflorescence, flush (noun)
the period of greatest prosperity or productivity
rash, roseola, efflorescence, skin rash (noun)
any red eruption of the skin
blossoming, flowering, florescence, inflorescence, anthesis, efflorescence (noun)
the time and process of budding and unfolding of blossoms
efflorescence, bloom (noun)
a powdery deposit on a surface
efflorescence (Noun)
The formation of a powdery surface on crystals, as a hydrate is converted to anhydrous form by losing loosely bound water of crystallization to the atmosphere.
efflorescence (Noun)
The production of flowers.
efflorescence (Noun)
(construction) 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 (Noun)
An encrustation of soluble salts, deposited on rock or soil by evaporation; often found in arid or geothermal environments.
efflorescence (Noun)
(metaphorical) Rapid flowering of a culture or civilisation etc.
efflorescence (Noun)
A redness, rash, or eruption on the skin.
Efflorescence
In chemistry, efflorescence is the loss of water of crystallization from a hydrated or solvated salt to the atmosphere on exposure to air. Efflorescences can occur in natural and built environments. On porous construction materials it may present a cosmetic problem only, but can sometimes indicate serious structural weakness.
Efflorescence
In chemistry, efflorescence (which means "to flower out" in French) is the migration of a salt to the surface of a porous material, where it forms a coating. The essential process involves the dissolving of an internally held salt in water, or occasionally in another solvent. The water, with the salt now held in solution, migrates to the surface, then evaporates, leaving a coating of the salt. In what has been described as "primary efflorescence", the water is the invader and the salt was already present internally, and a reverse process, where the salt is originally present externally and is then carried inside in solution, is referred to as "secondary efflorescence". Efflorescences can occur in natural and built environments. On porous construction materials it may present a cosmetic outer problem only (primary efflorescence causing staining), but can sometimes indicate internal structural weakness (migration/degradation of component materials). Efflorescence may clog the pores of porous materials, resulting in the destruction of those materials by internal water pressure, as seen in the spalling of brick.
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