Gypsum - Revision history

Editor at 07:31, 15 February 2023

2023-02-15T07:31:51Z

← Older revision		Revision as of 07:31, 15 February 2023
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	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.		Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.

−	In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. A process of calcining heats the powder, driving off most of the chemically-combined water.	+	In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. A process of calcining heats the powder, driving off most of the chemically-combined water. The two other forms of gypsum are called selenite and satin spar.

	This base gypsum is used for a wide variety of applications:		This base gypsum is used for a wide variety of applications:
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	* Blackboard chalk.		* Blackboard chalk.

−	= Related articles on Designing Buildings ~~Wiki~~ =	+	= Related articles on Designing Buildings =

	* Aggregate.		* Aggregate.

Editor at 08:59, 2 January 2023

2023-01-02T08:59:11Z

← Older revision		Revision as of 08:59, 2 January 2023
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	[[File:Gypsum.jpg\|link=File:Gypsum.jpg]]		[[File:Gypsum.jpg\|link=File:Gypsum.jpg]]

−	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. Natural gypsum is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt. More recently the term synthetic gypsum is used to describe gypsum that is manufactured or that forms as a by product of other processes, such as flue gas desulphurisation (FGD) gypsum which forms in coal-fired power stations.	+	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. Natural gypsum is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt.
		+
		+	More recently the term synthetic gypsum is used to describe gypsum that is manufactured or that forms as a by product of other processes, such as flue gas desulphurisation (FGD) gypsum which forms in coal-fired power stations.

	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.		Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.

Editor at 08:58, 2 January 2023

2023-01-02T08:58:52Z

← Older revision		Revision as of 08:58, 2 January 2023
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	[[File:Gypsum.jpg\|link=File:Gypsum.jpg]]		[[File:Gypsum.jpg\|link=File:Gypsum.jpg]]

−	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt.	+	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. Natural gypsum is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt. More recently the term synthetic gypsum is used to describe gypsum that is manufactured or that forms as a by product of other processes, such as flue gas desulphurisation (FGD) gypsum which forms in coal-fired power stations.

	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.		Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.

Designing Buildings at 09:33, 7 November 2021

2021-11-07T09:33:12Z

← Older revision		Revision as of 09:33, 7 November 2021
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	* Drywall construction.		* Drywall construction.
	* Fertilizer groundwater pollution.		* Fertilizer groundwater pollution.
		+	* Lime plaster.
	* Minerals of local and national importance.		* Minerals of local and national importance.
	* Mortar.		* Mortar.

Designing Buildings at 07:42, 17 November 2020

2020-11-17T07:42:04Z

← Older revision		Revision as of 07:42, 17 November 2020
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	* Plaster.		* Plaster.

−	[[Category:~~Products_/_components~~]] [[Category:DCN_Product_Knowledge]]	+	[[Category:DCN_Definition]] [[Category:DCN_Guidance]] [[Category:DCN_Product_Knowledge]] [[Category:Products_/_components]]

Designing Buildings at 16:01, 12 November 2018

2018-11-12T16:01:02Z

← Older revision		Revision as of 16:01, 12 November 2018
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	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt.		Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt.

−	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures.	+	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures. It is fire resistant and is effective at preventing the passage of sound.

	In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. A process of calcining heats the powder, driving off most of the chemically-combined water.		In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. A process of calcining heats the powder, driving off most of the chemically-combined water.
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	This base gypsum is used for a wide variety of applications:		This base gypsum is used for a wide variety of applications:

−	* ~~As the main constituent in several forms of plaster~~, plasterboard, wallboard, and so on.	+	* Plaster, plasterboard, wallboard, and so on.
−	* ~~For blackboard chalk~~.	+	* Blockwork.
−	* ~~In blocks for building construction~~.	+	* Mortar.
−	* ~~In mortar~~.	+	* Blackboard chalk.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* Plaster.		* Plaster.

−	[[Category:Products_/_components]]	+	[[Category:Products_/_components]] [[Category:DCN_Product_Knowledge]]

Designing Buildings at 15:56, 12 November 2018

2018-11-12T15:56:46Z

← Older revision		Revision as of 15:56, 12 November 2018
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−	[[File:Gypsum.jpg]]	+	[[File:Gypsum.jpg\|link=File:Gypsum.jpg]]

−	Gypsum is a ~~type of~~ soft sulfate mineral~~, referred to chemically by~~ the formula CaSO4·2H2O, ~~and~~ known as calcium sulfate dihydrate. It is comprised of calcium, ~~sulfur~~ bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and fertilizer ~~purposes dating back to~~ Ancient Egypt.	+	Gypsum is a soft sulfate mineral with the chemical formula CaSO4·2H2O, also known as calcium sulfate dihydrate. It is comprised of calcium, sulphur bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and and as a fertilizer since the time of Ancient Egypt.

−	~~In terms of its properties, gypsum exhibits retrograde solubility, meaning that it becomes less soluble at higher temperatures; and is moderately water soluble.~~ Pure gypsum is typically white, although impurities ~~may provide~~ a wide range of different colours ~~to deposits~~.	+	Pure gypsum is typically white, although impurities create a wide range of different colours. Gypsum is moderately water soluble but exhibits retrograde solubility, meaning it becomes less soluble at higher temperatures.

−	In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. ~~The~~ process of calcining heats the powder, driving off most of the chemically-combined water. ~~This base gypsum is used for a wide variety of applications:~~	+	In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. A process of calcining heats the powder, driving off most of the chemically-combined water.

−	* As the main constituent in several ~~different~~ forms of plaster, plasterboard~~, drywall~~, wallboard, and so on.	+	This base gypsum is used for a wide variety of applications:
		+
		+	* As the main constituent in several forms of plaster, plasterboard, wallboard, and so on.
	* For blackboard chalk.		* For blackboard chalk.
−	* As blocks for building construction~~, as per concrete blockwork~~.	+	* In blocks for building construction.
−	* ~~As a type of~~ mortar.	+	* In mortar.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =

Editor: Created page with "File:Gypsum.jpg Gypsum is a type of soft sulfate mineral, referred to chemically by the formula CaSO4·2H2O, and known as calcium sulfate dihydrate. It is comprised of calci..."

2018-11-12T13:09:35Z

Created page with "File:Gypsum.jpg Gypsum is a type of soft sulfate mineral, referred to chemically by the formula CaSO4·2H2O, and known as calcium sulfate dihydrate. It is comprised of calci..."

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[[File:Gypsum.jpg]]

Gypsum is a type of soft sulfate mineral, referred to chemically by the formula CaSO4·2H2O, and known as calcium sulfate dihydrate. It is comprised of calcium, sulfur bound to oxygen, and water. It is an abundant mineral in sedimentary rocks that has been mined and used for construction and fertilizer purposes dating back to Ancient Egypt.

In terms of its properties, gypsum exhibits retrograde solubility, meaning that it becomes less soluble at higher temperatures; and is moderately water soluble. Pure gypsum is typically white, although impurities may provide a wide range of different colours to deposits.

In terms of production, gypsum rock is mined or quarried and then crushed and ground into a fine powder. The process of calcining heats the powder, driving off most of the chemically-combined water. This base gypsum is used for a wide variety of applications:

* As the main constituent in several different forms of plaster, plasterboard, drywall, wallboard, and so on.
* For blackboard chalk.
* As blocks for building construction, as per concrete blockwork.
* As a type of mortar.

= Related articles on Designing Buildings Wiki =

* Aggregate.
* Coal ash.
* Construction materials.
* Drywall construction.
* Fertilizer groundwater pollution.
* Minerals of local and national importance.
* Mortar.
* Permission for mining or working of minerals.
* Plaster.

[[Category:Products_/_components]]