Hempcrete - Revision history

Designing Buildings at 07:11, 24 September 2020

2020-09-24T07:11:22Z

← Older revision		Revision as of 07:11, 24 September 2020
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	* American Lime Technology - What is [http://www.americanlimetechnology.com/what-is-hempcrete/ hempcrete]		* American Lime Technology - What is [http://www.americanlimetechnology.com/what-is-hempcrete/ hempcrete]

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

Editor at 13:15, 13 September 2017

2017-09-13T13:15:39Z

← Older revision		Revision as of 13:15, 13 September 2017
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	* K-Briq.		* K-Briq.
	* Limecrete.		* Limecrete.
		+	* Straw bale construction.
	* Sustainability.		* Sustainability.
	* Thermal insulation.		* Thermal insulation.
Line 51:		Line 52:
	* American Lime Technology - What is [http://www.americanlimetechnology.com/what-is-hempcrete/ hempcrete]		* American Lime Technology - What is [http://www.americanlimetechnology.com/what-is-hempcrete/ hempcrete]

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

Editor at 19:24, 4 September 2017

2017-09-04T19:24:00Z

← Older revision		Revision as of 19:24, 4 September 2017
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	* Composites.		* Composites.
	* Concrete.		* Concrete.
		+	* Could the buildings of the future be made with bones and eggshells?
	* Earth building.		* Earth building.
	* Floor insulation.		* Floor insulation.

Editor at 14:22, 2 August 2017

2017-08-02T14:22:56Z

← Older revision		Revision as of 14:22, 2 August 2017
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	* High alumina cement.		* High alumina cement.
	* K-Briq.		* K-Briq.
		+	* Limecrete.
	* Sustainability.		* Sustainability.
	* Thermal insulation.		* Thermal insulation.

Editor at 10:25, 12 April 2017

2017-04-12T10:25:54Z

← Older revision		Revision as of 10:25, 12 April 2017
Line 41:		Line 41:
	* Hemp lime construction: A guide to building with hemp lime composites.		* Hemp lime construction: A guide to building with hemp lime composites.
	* High alumina cement.		* High alumina cement.
		+	* K-Briq.
	* Sustainability.		* Sustainability.
	* Thermal insulation.		* Thermal insulation.

Designing Buildings at 10:13, 22 March 2017

2017-03-22T10:13:31Z

← Older revision		Revision as of 10:13, 22 March 2017
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	* Blockwork.		* Blockwork.
	* Cavity wall insulation.		* Cavity wall insulation.
		+	* Cellular concrete.
	* Composites.		* Composites.
	* Concrete.		* Concrete.

Designing Buildings at 08:26, 5 March 2017

2017-03-05T08:26:07Z

← Older revision		Revision as of 08:26, 5 March 2017
Line 38:		Line 38:
	* Floor insulation.		* Floor insulation.
	* Green building.		* Green building.
		+	* Hemp lime construction: A guide to building with hemp lime composites.
	* High alumina cement.		* High alumina cement.
	* Sustainability.		* Sustainability.

Designing Buildings at 13:39, 1 December 2016

2016-12-01T13:39:20Z

← Older revision		Revision as of 13:39, 1 December 2016
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	Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials such as concrete and traditional insulation.		Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials such as concrete and traditional insulation.

−	The basis of hempcrete is hemp, the balsa wood-like core (or ‘Shiv’) of a cannabis sativa plant. ~~The hemp is~~ combined with lime and water to form hempcrete. The hemp has a high silica content, a unique property among natural fibres, which allows it to bind well with the lime. As a lightweight cementitious insulating material, it weighs only one-seventh or one-eighth that of concrete.	+	The basis of hempcrete is hemp, the balsa wood-like core (or ‘Shiv’) of a cannabis sativa plant. Hemp can be combined with lime and water to form hempcrete. The hemp has a high silica content, a unique property among natural fibres, which allows it to bind well with the lime. As a lightweight cementitious insulating material, it weighs only one-seventh to one-eighth that of concrete.

−	Hemp as a building material has been used across Europe for centuries, and as a modern building material, industrial hemp is grown by certified commercial growers. The strain of plant grown for hempcrete contains 0.3% of THC, the ingredient in cannabis that provides its psychoactive nature. This is compared to the THC content found in hallucinogenic and medicinal varieties of between 5-10%.	+	Hemp as a building material has been used across Europe for centuries, and as a modern building material, industrial hemp is now grown by certified commercial growers. The strain of plant grown for hempcrete contains 0.3% of THC, the ingredient in cannabis that provides its psychoactive nature. This is compared to the THC content found in hallucinogenic and medicinal varieties of between 5-10%.

−	While it is legally grown in Europe and Canada, growing hemp in America has been illegal for several decades. However, with the country’s gradual liberalisation of laws regarding the substance for medicinal and personal use, this may ~~soon~~ change.	+	While it is legally grown in Europe and Canada, growing hemp in America has been illegal for several decades. However, with the country’s gradual liberalisation of laws regarding the substance for medicinal and personal use, this may change.

	= Application =		= Application =

−	The material is mixed for 1-2 minutes before being applied into the wall cavities ~~by hand. Slip~~-forming with temporary timber or plastic shuttering ~~enables the formation~~. A hard render coating is ~~finishing~~ on ~~the~~ exterior with a thickness of around 20 mm~~, to protect the surface~~. The interior can be left natural or, for a traditional aesthetic, finished with lime plaster.	+	The material is mixed for 1-2 minutes before being applied, either into the wall cavities, or slip-forming with temporary timber or plastic shuttering. A hard render coating is generally applied as a finish on exterior surfaces with a thickness of around 20 mm. The interior can be left 'natural' or, for a traditional aesthetic, finished with lime plaster.

	= Properties =		= Properties =

−	Hempcrete has a number of beneficial properties~~, including being very durable~~.	+	Hempcrete is very durable and has a number of other beneficial properties.

−	Similar to other natural plant products, carbon dioxide is absorbed from the atmosphere by hemp as it grows. During the curing process, as lime turns to limestone, the carbonation of the lime adds to this effect. ~~Therefore~~, hempcrete ~~creates~~ a negative carbon footprint, ~~offering a~~ considerable potential for sustainable building.	+	Similar to other natural plant products, carbon dioxide is absorbed from the atmosphere by hemp as it grows. During the curing process, as lime turns to limestone, the carbonation of the lime adds to this effect. As a result, hempcrete has a negative carbon footprint, with considerable potential for sustainable building.

−	It is able to naturally regulate a building’s humidity and temperature, which can reduce condensation and energy ~~demand~~, and improve ~~the~~ thermal comfort for occupants. It provides natural insulation that is airtight, breathable and flexible. It is also toxin-free, impervious to mould and pests, and highly fire-resistant.	+	It is able to naturally regulate a building’s humidity and temperature, which can reduce condensation and energy consumption, and improve thermal comfort for occupants. It provides natural insulation that is airtight, breathable and flexible. It is also toxin-free, impervious to mould and pests, and highly fire-resistant.

−	Hempcrete has a typical compressive strength of around 1 MPa, which is around 1/20 that of residential grade concrete, and has a density of 15% that of concrete. This means that hempcrete walls must be used together with a vertical load-bearing frame of another material. It is very suited to areas at risk of seismic activity since it is a low density material that is resistant to cracking under movement.	+	It is very suited to areas at risk of seismic activity since it is a low density material that is resistant to cracking under movement. The outer portion of the plant’s stalk can also provide fibres for building textiles.

−	~~The outer portion~~ of ~~the plant’s stalk can also provide fibres for building textiles~~.	+	However, hempcrete has a typical compressive strength of around 1 MPa, which is around 1/20 that of residential grade concrete, and has a density 15% that of concrete. This means that hempcrete walls must be used together with a load-bearing frame of another material.

	= Find out more =		= Find out more =

Editor at 12:11, 1 December 2016

2016-12-01T12:11:50Z

← Older revision		Revision as of 12:11, 1 December 2016
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−	[[File:Hempcrete-blocks.jpg]]	+	[[File:Hempcrete-blocks.jpg\|link=File:Hempcrete-blocks.jpg]]

	= Introduction =		= Introduction =
Line 5:		Line 5:
	Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials such as concrete and traditional insulation.		Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials such as concrete and traditional insulation.

−	The basis of hempcrete is hemp, the balsa wood-like core (or ‘Shiv’) of a cannabis sativa plant. The hemp is combined with lime and water. The hemp has a high silica content, a unique property among natural fibres, which allows it to bind well with the lime. As a lightweight cementitious insulating material, it weighs only one-seventh or one-eighth that of concrete.	+	The basis of hempcrete is hemp, the balsa wood-like core (or ‘Shiv’) of a cannabis sativa plant. The hemp is combined with lime and water to form hempcrete. The hemp has a high silica content, a unique property among natural fibres, which allows it to bind well with the lime. As a lightweight cementitious insulating material, it weighs only one-seventh or one-eighth that of concrete.

	Hemp as a building material has been used across Europe for centuries, and as a modern building material, industrial hemp is grown by certified commercial growers. The strain of plant grown for hempcrete contains 0.3% of THC, the ingredient in cannabis that provides its psychoactive nature. This is compared to the THC content found in hallucinogenic and medicinal varieties of between 5-10%.		Hemp as a building material has been used across Europe for centuries, and as a modern building material, industrial hemp is grown by certified commercial growers. The strain of plant grown for hempcrete contains 0.3% of THC, the ingredient in cannabis that provides its psychoactive nature. This is compared to the THC content found in hallucinogenic and medicinal varieties of between 5-10%.

Editor: Created page with "File:Hempcrete-blocks.jpg = Introduction = Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials su..."

2016-12-01T12:11:09Z

Created page with "File:Hempcrete-blocks.jpg = Introduction = Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials su..."

New page

[[File:Hempcrete-blocks.jpg]]

= Introduction =

Hempcrete, also known as hemplime, is a bio-composite material that can be used in construction as an alternative to materials such as concrete and traditional insulation.

The basis of hempcrete is hemp, the balsa wood-like core (or ‘Shiv’) of a cannabis sativa plant. The hemp is combined with lime and water. The hemp has a high silica content, a unique property among natural fibres, which allows it to bind well with the lime. As a lightweight cementitious insulating material, it weighs only one-seventh or one-eighth that of concrete.

Hemp as a building material has been used across Europe for centuries, and as a modern building material, industrial hemp is grown by certified commercial growers. The strain of plant grown for hempcrete contains 0.3% of THC, the ingredient in cannabis that provides its psychoactive nature. This is compared to the THC content found in hallucinogenic and medicinal varieties of between 5-10%.

While it is legally grown in Europe and Canada, growing hemp in America has been illegal for several decades. However, with the country’s gradual liberalisation of laws regarding the substance for medicinal and personal use, this may soon change.

= Application =

The material is mixed for 1-2 minutes before being applied into the wall cavities by hand. Slip-forming with temporary timber or plastic shuttering enables the formation. A hard render coating is finishing on the exterior with a thickness of around 20 mm, to protect the surface. The interior can be left natural or, for a traditional aesthetic, finished with lime plaster.

= Properties =

Hempcrete has a number of beneficial properties, including being very durable.

Similar to other natural plant products, carbon dioxide is absorbed from the atmosphere by hemp as it grows. During the curing process, as lime turns to limestone, the carbonation of the lime adds to this effect. Therefore, hempcrete creates a negative carbon footprint, offering a considerable potential for sustainable building.

It is able to naturally regulate a building’s humidity and temperature, which can reduce condensation and energy demand, and improve the thermal comfort for occupants. It provides natural insulation that is airtight, breathable and flexible. It is also toxin-free, impervious to mould and pests, and highly fire-resistant.

Hempcrete has a typical compressive strength of around 1 MPa, which is around 1/20 that of residential grade concrete, and has a density of 15% that of concrete. This means that hempcrete walls must be used together with a vertical load-bearing frame of another material. It is very suited to areas at risk of seismic activity since it is a low density material that is resistant to cracking under movement.

The outer portion of the plant’s stalk can also provide fibres for building textiles.

= Find out more =

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

* Blockwork.
* Cavity wall insulation.
* Composites.
* Concrete.
* Earth building.
* Floor insulation.
* Green building.
* High alumina cement.
* Sustainability.
* Thermal insulation.

=== External resources ===

* American Lime Technology - What is [http://www.americanlimetechnology.com/what-is-hempcrete/ hempcrete]

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