Prab: CSV import

2025-02-18T12:09:51Z

CSV import

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			<gallery>
			File:Fontainebleau_escalier_roi5.jpg\|Plaster
			File:Mud_plaster_over_straw_bales_wall.jpg\|Plaster
			File:Clay_plaster_ceiling.jpg\|Plaster
			File:Clay,_straw_lime_on_wall_lath_closeup.jpg\|Plaster
			File:Cast_extended.jpg\|Plaster
			File:Plasterer_at_work_on_a_wall_arp.jpg\|Plaster
			File:John_Cranch_-_Plasterer_-_Google_Art_Project.jpg\|Plaster
			File:Gachbori_kashan.jpg\|Plaster
			File:Face_plaster_cast_application.jpg\|Plaster
			File:sch_op_8.jpg\|Plaster
			File:Himeji_Castle_The_Keep_Towers.jpg\|Plaster
			File:Plaster_-_Putz_in_Pompeji.JPG\|Plaster
			</gallery>

Prab: CSV import

2024-02-25T16:35:21Z

CSV import

New page

'''Plaster''' is a building material used for the protective or decorative coating of walls and ceilings and for moulding and casting decorative elements. In English "plaster" usually means a material used for the interiors of buildings, while "render" commonly refers to external applications. Another imprecise term used for the material is stucco, which is often used for plasterwork that is worked in some way to produce relief decoration, rather than flat surfaces.

==Composition==
The most common types of plaster mainly contain either [[gypsum]], [[lime]], or [[cement]], but all work in a similar way. The plaster is manufactured as a dry powder and is mixed with water to form a stiff but workable paste immediately before it is applied to the surface. The reaction with water liberates heat through crystallization and the hydrated plaster then hardens.

==Types of Plaster==
===Gypsum Plaster===
Gypsum plaster, or plaster of Paris, is produced by heating gypsum to about 300 °F (150 °C):
CaSO4·2H2O + heat → CaSO4·0.5H2O + 1.5H2O (released as steam).

===Lime Plaster===
Lime plaster is a mixture of [[calcium hydroxide]] and sand (or other inert fillers). Carbon dioxide in the atmosphere causes the plaster to set by transforming the calcium hydroxide into calcium carbonate (limestone).

===Cement Plaster===
Cement plaster is a mixture of suitable plaster, sand, [[Portland cement]] and water which is normally applied to masonry interiors and exteriors to achieve a smooth surface.

==Uses==
Plaster can be relatively easily worked with metal tools or even sandpaper, and can be moulded, either on site or to make pre-formed sections in advance, which are put in place with adhesive. Plaster is not a strong material; it is suitable for finishing, rather than load-bearing, and when thickly applied for decoration may require a hidden supporting framework, usually in metal.

==See Also==
* [[Stucco]]
* [[Mortar (masonry)]]
* [[Plasterwork]]

[[Category:Building materials]]
[[Category:Wall coverings]]
[[Category:Gypsum]]
[[Category:Lime (material)]]
[[Category:Cement]]

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← Older revision		Revision as of 12:09, 18 February 2025
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	{{stub}}		{{stub}}
			<gallery>
			File:Fontainebleau_escalier_roi5.jpg\|Plaster
			File:Mud_plaster_over_straw_bales_wall.jpg\|Plaster
			File:Clay_plaster_ceiling.jpg\|Plaster
			File:Clay,_straw_lime_on_wall_lath_closeup.jpg\|Plaster
			File:Cast_extended.jpg\|Plaster
			File:Plasterer_at_work_on_a_wall_arp.jpg\|Plaster
			File:John_Cranch_-_Plasterer_-_Google_Art_Project.jpg\|Plaster
			File:Gachbori_kashan.jpg\|Plaster
			File:Face_plaster_cast_application.jpg\|Plaster
			File:sch_op_8.jpg\|Plaster
			File:Himeji_Castle_The_Keep_Towers.jpg\|Plaster
			File:Plaster_-_Putz_in_Pompeji.JPG\|Plaster
			</gallery>

Plaster - Revision history

Prab: CSV import

Prab: CSV import