Bentonite - Revision history

Designing Buildings at 08:29, 26 October 2022

2022-10-26T08:29:41Z

← Older revision		Revision as of 08:29, 26 October 2022
Line 11:		Line 11:
	It can also be used in varnishes and paints to act as a thickening and/or suspension agent.		It can also be used in varnishes and paints to act as a thickening and/or suspension agent.

−	~~= Find out more =~~	+	NB [https://www.gov.uk/government/publications/glossary-abbreviations-and-references High Speed Rail (Crewe – Manchester) Environmental Statement, Glossary, abbreviations and references], published by the Department for Transport in 2022, defines bentonite as: ‘A natural clay that, when mixed with water, swells and forms a thixotropic gel (a particular type of viscous behaviour exhibited by some liquids). It can be used temporarily to support trenches or retaining walls, and helps to prevent collapse when they are being backfilled (i.e. refilled) or concreted.’

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

	* Admixtures in concrete.		* Admixtures in concrete.

Designing Buildings at 08:29, 15 November 2020

2020-11-15T08:29:12Z

← Older revision		Revision as of 08:29, 15 November 2020
Line 26:		Line 26:
	* Water engineering.		* Water engineering.

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

193.240.210.12 at 14:34, 5 July 2019

2019-07-05T14:34:33Z

← Older revision		Revision as of 14:34, 5 July 2019
Line 1:		Line 1:
	Bentonite is a naturally-occurring material created by the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually montmorillonite, which occur as layers which are compressed between other rock types.		Bentonite is a naturally-occurring material created by the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually montmorillonite, which occur as layers which are compressed between other rock types.

−	Bentonite is usually ~~obtaines~~ by quarrying, with a solid extracted form with a typical moisture content of around 30%. This moisture content is reduced to approximately 15% by air and/or forced drying after being crushed. Once this has been done, bentonite is either sieved in a granular form, or milled into powder form.	+	Bentonite is usually obtained by quarrying, with a solid extracted form with a typical moisture content of around 30%. This moisture content is reduced to approximately 15% by air and/or forced drying after being crushed. Once this has been done, bentonite is either sieved in a granular form, or milled into powder form.

	In civil engineering, bentonite is used as a thixotropic, support and lubricant agent. Typical applications for this agent include the construction of diaphragm walls, foundations, pipe jacking, tunnelling, and so on. Its viscosity and plasticity also make it suitable for use in Portland cement and mortars.		In civil engineering, bentonite is used as a thixotropic, support and lubricant agent. Typical applications for this agent include the construction of diaphragm walls, foundations, pipe jacking, tunnelling, and so on. Its viscosity and plasticity also make it suitable for use in Portland cement and mortars.
Line 26:		Line 26:
	* Water engineering.		* Water engineering.

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

Editor at 15:17, 23 April 2018

2018-04-23T15:17:38Z

← Older revision		Revision as of 15:17, 23 April 2018
Line 16:		Line 16:

	* Admixtures in concrete.		* Admixtures in concrete.
		+	* Alluvium.
	* Bored piles.		* Bored piles.
	* Diaphragm wall.		* Diaphragm wall.

Editor at 16:48, 4 April 2018

2018-04-04T16:48:29Z

← Older revision		Revision as of 16:48, 4 April 2018
Line 15:		Line 15:
	=== Related articles on Designing Buildings Wiki ===		=== Related articles on Designing Buildings Wiki ===

		+	* Admixtures in concrete.
	* Bored piles.		* Bored piles.
	* Diaphragm wall.		* Diaphragm wall.

Designing Buildings at 10:59, 2 February 2018

2018-02-02T10:59:42Z

← Older revision		Revision as of 10:59, 2 February 2018
Line 1:		Line 1:
−	Bentonite is a naturally-occurring material ~~that is generated from~~ the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually montmorillonite, which occur as layers which are compressed between other rock types.	+	Bentonite is a naturally-occurring material created by the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually montmorillonite, which occur as layers which are compressed between other rock types.

−	Bentonite is usually ~~exploited~~ by quarrying, with a solid extracted form with a typical moisture content of around 30%. This moisture content is reduced to approximately 15% by air and/or forced drying after being crushed. Once this is done, bentonite is either sieved in a granular form, or milled into powder form.	+	Bentonite is usually obtaines by quarrying, with a solid extracted form with a typical moisture content of around 30%. This moisture content is reduced to approximately 15% by air and/or forced drying after being crushed. Once this has been done, bentonite is either sieved in a granular form, or milled into powder form.

−	In civil engineering, bentonite is used as a thixotropic, support and lubricant agent. Typical applications for this agent include diaphragm walls, foundations, pipe jacking, tunnelling, and so on. Its viscosity and plasticity also make it suitable for use in Portland cement and mortars.	+	In civil engineering, bentonite is used as a thixotropic, support and lubricant agent. Typical applications for this agent include the construction of diaphragm walls, foundations, pipe jacking, tunnelling, and so on. Its viscosity and plasticity also make it suitable for use in Portland cement and mortars.

−	Bentonite’s thixotropic properties mean it forms a highly water-resistant gel which, when mixed with additives, can create a permanent barrier to water flow. This is used where soil particles are too small for cement grouting, ~~most commonly~~ to combat seepage in alluvial soils beneath the foundations of dams or other water-bound structures.	+	Bentonite’s thixotropic properties mean it forms a highly water-resistant gel which, when mixed with additives, can create a permanent barrier to water flow. This is commonly used in situations where soil particles are too small for cement grouting to be suitable, typically to combat seepage in alluvial soils beneath the foundations of dams or other water-bound structures.

	For drilling purposes, bentonite can be used as a mud constituent, to seal borehole walls, remove drill cuttings, and so on.		For drilling purposes, bentonite can be used as a mud constituent, to seal borehole walls, remove drill cuttings, and so on.

Editor: Created page with "Bentonite is a naturally-occurring material that is generated from the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually..."

2018-01-18T12:27:36Z

Created page with "Bentonite is a naturally-occurring material that is generated from the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually..."

New page

Bentonite is a naturally-occurring material that is generated from the alteration of volcanic ash in marine environments. It consists mainly of the clay mineral smectite, usually montmorillonite, which occur as layers which are compressed between other rock types.

Bentonite is usually exploited by quarrying, with a solid extracted form with a typical moisture content of around 30%. This moisture content is reduced to approximately 15% by air and/or forced drying after being crushed. Once this is done, bentonite is either sieved in a granular form, or milled into powder form.

In civil engineering, bentonite is used as a thixotropic, support and lubricant agent. Typical applications for this agent include diaphragm walls, foundations, pipe jacking, tunnelling, and so on. Its viscosity and plasticity also make it suitable for use in Portland cement and mortars.

Bentonite’s thixotropic properties mean it forms a highly water-resistant gel which, when mixed with additives, can create a permanent barrier to water flow. This is used where soil particles are too small for cement grouting, most commonly to combat seepage in alluvial soils beneath the foundations of dams or other water-bound structures.

For drilling purposes, bentonite can be used as a mud constituent, to seal borehole walls, remove drill cuttings, and so on.

It can also be used in varnishes and paints to act as a thickening and/or suspension agent.

= Find out more =

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

* Bored piles.
* Diaphragm wall.
* Grout barriers.
* Grouting in civil engineering.
* Mortar.
* Paint.
* Secant pile wall.
* Water engineering.

[[Category:Products_/_components]]