Difference between revisions of "Lime"
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== Description == | == Description == | ||
| − | Any of several forms of calcium oxide obtained from heating [http://cameo.mfa.org/materials/fullrecord.asp?name=calcium | + | Any of several forms of calcium oxide obtained from heating [http://cameo.mfa.org/materials/fullrecord.asp?name=calcium%20carbonate calcium carbonate] ([http://cameo.mfa.org/materials/fullrecord.asp?name=limestone limestone], [http://cameo.mfa.org/materials/fullrecord.asp?name=marble marble], [http://cameo.mfa.org/materials/fullrecord.asp?name=chalk chalk], and [http://cameo.mfa.org/materials/fullrecord.asp?name=seashell shells]). When calcium carbonate is heated to about 500 C, carbon dioxide is driven off leaving anhydrous [http://cameo.mfa.org/materials/fullrecord.asp?name=calcium%20oxide calcium oxide] or [http://cameo.mfa.org/materials/fullrecord.asp?name=quicklime quicklime]. When quicklime is soaked in water, it is changed to [http://cameo.mfa.org/materials/fullrecord.asp?name=calcium%20hydroxide calcium hydroxide] or [http://cameo.mfa.org/materials/fullrecord.asp?name=slaked%20lime slaked lime]. Slaked lime that is dried and ground to a fine powder is called hydrated lime or lime hydrate. Lime will eventually harden and react with carbon dioxide to reform calcium carbonate. Lime is used in [http://cameo.mfa.org/materials/fullrecord.asp?name=mortar%20%28masonry%29 mortar], [http://cameo.mfa.org/materials/fullrecord.asp?name=cement cement], [http://cameo.mfa.org/materials/fullrecord.asp?name=stucco stucco], [http://cameo.mfa.org/materials/fullrecord.asp?name=glass glass], [http://cameo.mfa.org/materials/fullrecord.asp?name=whitewash whitewash], putty, leather tanning, papermaking, and as a water-softening agent. |
== Synonyms and Related Terms == | == Synonyms and Related Terms == | ||
| − | calcium oxide; calcium hydroxide; calcia; quicklime; caustic lime; hot lime; hydraulic lime; hydrated lime; burnt lime; chaux (Fr.); cal (Esp., Port.); , Gebrannter Kalk, | + | calcium oxide; calcium hydroxide; calcia; quicklime; caustic lime; hot lime; hydraulic lime; hydrated lime; burnt lime; chaux (Fr.); cal (Esp., Port.); , Gebrannter Kalk, Gelöschter Kalk (Deut.); ongebluste kalk (Ned.) |
== Other Properties == | == Other Properties == | ||
Revision as of 06:41, 24 July 2013
Description
Any of several forms of calcium oxide obtained from heating calcium carbonate (limestone, marble, chalk, and shells). When calcium carbonate is heated to about 500 C, carbon dioxide is driven off leaving anhydrous calcium oxide or quicklime. When quicklime is soaked in water, it is changed to calcium hydroxide or slaked lime. Slaked lime that is dried and ground to a fine powder is called hydrated lime or lime hydrate. Lime will eventually harden and react with carbon dioxide to reform calcium carbonate. Lime is used in mortar, cement, stucco, glass, whitewash, putty, leather tanning, papermaking, and as a water-softening agent.
Synonyms and Related Terms
calcium oxide; calcium hydroxide; calcia; quicklime; caustic lime; hot lime; hydraulic lime; hydrated lime; burnt lime; chaux (Fr.); cal (Esp., Port.); , Gebrannter Kalk, Gelöschter Kalk (Deut.); ongebluste kalk (Ned.)
Other Properties
Slightly soluble in water.
| Composition | CaO |
|---|
Hazards and Safety
Noncombustible. Caustic material that may cause irritation and burns on contact.
Additional Information
Jonathan Taylor, "Lime: The Basics", Building Conservation Directory 2000 : Link