Lime pushonka extinguished
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Lime a pushonka - for preparation of masonry and plaster solutions, and also in concrete of the low brands used in dry conditions.
Lime a pushonka - lime extinguished (lime hydrate, lime a pushonka). Receive from lump or ground lime by gasheniyeya it water. If the amount of water makes 60–80% of the mass of lime, lumps break up to fine particles and lime a pushonka is formed. At further dilution by water receive respectively limy dough and limy milk. It is applied to preparation of masonry and plaster solutions, and also in concrete of the low brands used in dry conditions. Lime a pushonka is used for preparation of dry mixes.
The main volumes are used in construction as limy cement — when mixing with water, oxide of calcium passes into hydroxide which further, absorbing carbon dioxide from air, strongly hardens, turning into a calcium carbonate. However now limy cement at construction of houses is tried not to be applied as the received structures possess ability to absorb and accumulate dampness.
Use of limy cement at a laying of furnaces is categorically inadmissible — because of thermal decomposition and allocation in air of suffocating carbon dioxide.
Also finds some application as available and inexpensive fire-resistant material — melted oxide of calcium has some resistance to water influence that allows to use it as an ogneupor where use of more expensive materials is inexpedient.
In small amounts calcium oxide is also used in laboratory practice for drainage of substances which do not react with it.
In the food industry it is registered as a food additive of E-529.