Plasticiser - Revision history

Designing Buildings at 09:09, 19 April 2021

2021-04-19T09:09:11Z

← Older revision		Revision as of 09:09, 19 April 2021
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	Lime added to mortars is well known for giving them a soft, putty-like consistency which can make them easier to work and retard their setting. Air entrainment plasticisers when used in the correct proportions can have a similar effect and are sometimes used to replace lime within the mix.		Lime added to mortars is well known for giving them a soft, putty-like consistency which can make them easier to work and retard their setting. Air entrainment plasticisers when used in the correct proportions can have a similar effect and are sometimes used to replace lime within the mix.
		+
		+	NB Plasticisers can also be used in plastics. For more information see: Plasticisation.

	= Washing-up liquid =		= Washing-up liquid =
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	See also: Admixtures in concrete.		See also: Admixtures in concrete.
		+
		+	See also Plasticisation.

	= Related articles on Designing Buildings Wiki =		= Related articles on Designing Buildings Wiki =
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	* Lime mortar.		* Lime mortar.
	* Mortar analysis for specifiers.		* Mortar analysis for specifiers.
		+	* Plasticisation.
	* Rendering.		* Rendering.
	* Repointing.		* Repointing.

Editor at 15:16, 9 December 2020

2020-12-09T15:16:11Z

← Older revision		Revision as of 15:16, 9 December 2020
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	* Ultra high performance fibre concrete.		* Ultra high performance fibre concrete.

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

Designing Buildings at 12:18, 4 February 2020

2020-02-04T12:18:41Z

← Older revision		Revision as of 12:18, 4 February 2020
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	* Spalling.		* Spalling.
	* Types of mortar.		* Types of mortar.
		+	* Ultra high performance fibre concrete.

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

Designing Buildings at 11:15, 17 January 2020

2020-01-17T11:15:02Z

← Older revision		Revision as of 11:15, 17 January 2020
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	The use of washing-up liquid is discouraged by many professionals, as well as The Brick Development Association which says: “Washing-up liquids and any additives containing calcium chloride should not be used as they can weaken the mortar and contribute to efflorescence staining.”		The use of washing-up liquid is discouraged by many professionals, as well as The Brick Development Association which says: “Washing-up liquids and any additives containing calcium chloride should not be used as they can weaken the mortar and contribute to efflorescence staining.”
		+
		+	= Superplasticisers =
		+
		+	Concrete superplasticisers play a vital role in improving the quality and reducing the cost of construction. Superplasticisers are particularly suited to the manufacture high strength concrete for construction. They are chemical admixtures that have water-reduction capabilities that range from 5.0% to 40.0% in concrete mixes.
		+
		+	For more information see: Concrete superplasticisers.
		+
		+	See also: Admixtures in concrete.

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

		+	* Admixtures in concrete.
	* Binding agent.		* Binding agent.
	* Blockwork.		* Blockwork.
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	* Cement.		* Cement.
	* Cement mortar.		* Cement mortar.
		+	* Concrete superplasticisers.
	* Defects in brickwork.		* Defects in brickwork.
	* Defects in stonework.		* Defects in stonework.
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	* Lime mortar.		* Lime mortar.
	* Mortar analysis for specifiers.		* Mortar analysis for specifiers.
−	* Natural materials.
−	* Parapet.
−	* Perpend.
−	* Pistol brick.
	* Rendering.		* Rendering.
	* Repointing.		* Repointing.
	* Spalling.		* Spalling.
	* Types of mortar.		* Types of mortar.
−	* Which way up should you lay a brick?

	[[Category:Construction_techniques]] [[Category:Products_/_components]]		[[Category:Construction_techniques]] [[Category:Products_/_components]]

Designing Buildings at 11:08, 17 January 2020

2020-01-17T11:08:17Z

← Older revision		Revision as of 11:08, 17 January 2020
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	= Introduction =		= Introduction =

−	Plasticisers (or dispersants) are substances added to cement mortar mixes (as well as to plaster and concrete) to decrease ~~the~~ viscosity and plasticity and increase workability and performance. ~~They work by making~~ the mix more flexible and easier to maintain a more consistent mortar thickness. In turn, this can mean that bricklayers are able to lay more bricks than they otherwise might.	+	Plasticisers (admixtures or dispersants) are substances added to materials such as cement mortar mixes (as well as to plaster and concrete) to decrease viscosity and plasticity and increase workability and performance. In the case of mortar, they make the mix more flexible and easier to maintain a more consistent mortar thickness. In turn, this can mean that bricklayers are able to lay more bricks than they otherwise might.

−	Numerous types of plasticisers ~~(sometimes called admixtures)~~ are available commercially to enhance workability. They typically work by retarding the mortar setting and ~~provide~~ air entrainment to assist workability. They can also help prevent mortar shrinkage, which if it occurs, does not only look unsightly in mortar joints but also can allow water ingress. Excessive use of plasticisers can have an adverse effect on the mortar.	+	Numerous types of plasticisers are available commercially to enhance workability. They typically work by retarding the mortar from setting and providing air entrainment to assist workability. They can also help prevent mortar shrinkage, which if it occurs, does not only look unsightly in mortar joints but also can allow water ingress. Excessive use of plasticisers can have an adverse effect on the mortar.

	Lime added to mortars is well known for giving them a soft, putty-like consistency which can make them easier to work and retard their setting. Air entrainment plasticisers when used in the correct proportions can have a similar effect and are sometimes used to replace lime within the mix.		Lime added to mortars is well known for giving them a soft, putty-like consistency which can make them easier to work and retard their setting. Air entrainment plasticisers when used in the correct proportions can have a similar effect and are sometimes used to replace lime within the mix.
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	= Washing-up liquid =		= Washing-up liquid =

−	Washing up liquid is commonly used as a plasticiser in cement mortar. However, it is thought to affect the long-term structural integrity of the mortar as it can add too much air, thereby creating bubbles. The surfactants in washing up liquid may also produce foam if used in excess. These bubbles may fill with moisture in winter and if freezing occurs could cause pore expansion, cracking and disintegration of the mortar. That said, it is a very common practice in the UK.	+	Washing up liquid is commonly used as a plasticiser in cement mortar. However, it is thought to affect the long-term structural integrity of the mortar as it can add too much air, thereby creating bubbles. The surfactants in washing up liquid may also produce foam if used in excess. These bubbles may fill with moisture in winter and if freezing occurs could cause pore expansion, cracking and disintegration of the mortar. That said, it is a very common practice in the UK, and is used in training brick laying as it can prevent the mortar from setting so it can be re-worked or re-used.

−	The ~~use of a proprietary plasticiser can only add a limited amount of air to the mix. But the~~ use of washing-up liquid is discouraged by many professionals, as well as The Brick Development Association which says:	+	The use of washing-up liquid is discouraged by many professionals, as well as The Brick Development Association which says: “Washing-up liquids and any additives containing calcium chloride should not be used as they can weaken the mortar and contribute to efflorescence staining.”
−		+
−	“Washing-up liquids and any additives containing calcium chloride should not be used as they can weaken the mortar and contribute to efflorescence staining.”	+

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

Editor: Created page with "= Introduction = Plasticisers (or dispersants) are substances added to cement mortar mixes (as well as to plaster and concrete) to decrease the viscosity and plasticity and incr..."

2020-01-16T16:50:16Z

Created page with "= Introduction = Plasticisers (or dispersants) are substances added to cement mortar mixes (as well as to plaster and concrete) to decrease the viscosity and plasticity and incr..."

New page

= Introduction =

Plasticisers (or dispersants) are substances added to cement mortar mixes (as well as to plaster and concrete) to decrease the viscosity and plasticity and increase workability and performance. They work by making the mix more flexible and easier to maintain a more consistent mortar thickness. In turn, this can mean that bricklayers are able to lay more bricks than they otherwise might.

Numerous types of plasticisers (sometimes called admixtures) are available commercially to enhance workability. They typically work by retarding the mortar setting and provide air entrainment to assist workability. They can also help prevent mortar shrinkage, which if it occurs, does not only look unsightly in mortar joints but also can allow water ingress. Excessive use of plasticisers can have an adverse effect on the mortar.

Lime added to mortars is well known for giving them a soft, putty-like consistency which can make them easier to work and retard their setting. Air entrainment plasticisers when used in the correct proportions can have a similar effect and are sometimes used to replace lime within the mix.

= Washing-up liquid =

Washing up liquid is commonly used as a plasticiser in cement mortar. However, it is thought to affect the long-term structural integrity of the mortar as it can add too much air, thereby creating bubbles. The surfactants in washing up liquid may also produce foam if used in excess. These bubbles may fill with moisture in winter and if freezing occurs could cause pore expansion, cracking and disintegration of the mortar. That said, it is a very common practice in the UK.

The use of a proprietary plasticiser can only add a limited amount of air to the mix. But the use of washing-up liquid is discouraged by many professionals, as well as The Brick Development Association which says:

“Washing-up liquids and any additives containing calcium chloride should not be used as they can weaken the mortar and contribute to efflorescence staining.”

= Related articles on Designing Buildings Wiki =

* Binding agent.
* Blockwork.
* Brick
* Bullseye window.
* Cement.
* Cement mortar.
* Defects in brickwork.
* Defects in stonework.
* Efflorescence.
* Grout.
* Hot-mixed mortars: the new lime revival.
* Lime mortar.
* Mortar analysis for specifiers.
* Natural materials.
* Parapet.
* Perpend.
* Pistol brick.
* Rendering.
* Repointing.
* Spalling.
* Types of mortar.
* Which way up should you lay a brick?

[[Category:Construction_techniques]] [[Category:Products_/_components]]