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Hemp Brick

Description

Hempcrete is a mixture of hemp hurds and lime (possibly including sand, pozzolans or cement) used as a material for construction and insulation. It is easier to work than traditional lime mixes and acts as an insulator and moisture regulator. It lacks the brittleness of cement and consequently does not need expansion joints. It is less dense than concrete and is marketed under names like Hemcrete, Canobiote, Canosmose, and Isochanvre. However, the typical compressive strength is around 1MPa, over 20x lower than low grade concrete. Hempcrete's density is 15% as traditional concrete, as well as Carbon negative. The strength and flexibility means that hemp foundations are resistant to stress-induced cracking and breaking, even in earthquake-prone areas.

The building material also is self-insulating; resistant to rotting, rodents and insects; and fire proof, waterproof and weather resistant.
Pipes can be made out of hempcrete and they, too have greater flexibility and greater elasticity than other those made from conventional materials, and they are resistant to cracking. Stones can also be made out of hemp by wetting the stalk's cellulose, and forming it into a hard black rock, which can be cut, drilled, cast, carved or formed into any shape.

One promising application for this plant is as a building material for Bioclimatic architecture in the form of a brick.

The Spanish newspaper El Mundo reports about Cannabric (Spanish only), a company launched nine years ago by the German architect Monika Brьmmer in Guadix, province of Granada. Her career project researching vegetable building materials led her to this hemp product, achieved through an arduous trial and error process.

An “eco-brick” is composed of industrial hemp, natural slaked lime and a mixture of minerals. The higher price this brick commands versus a traditional one is more than compensated by a series of advantages:

1) Growing hemp improves the condition of the ground. It is a robust and fast-growing plant that requires neither herbicides nor pesticides during its cultivation.
2) Industrial hemp has a very low thermal conductivity, producing a brick with vastly superior insulation properties against both cold and heat.
3) It produces no toxic by products and is fully recyclable
4) It absorbs sound and is non-flammable
5) It is a popular material in the cave houses typical of the area around Guadix, in Granada and it is also gaining ground in other regions around Spain, as it is especially suited to areas reaching extremes of temperature in summer and winter. It has even been used in the restoration of a monastery in the province of Palencia. Hemp bricks have also been used in projects in France and England

Other Facts

The Spanish newspaper El Mundo reports about Cannabric (Spanish only), a company launched nine years ago by the German architect Monika Brьmmer in Guadix, province of Granada. Her career project researching vegetable building materials led her to this hemp product, achieved through an arduous trial and error process.

An “eco-brick” is composed of industrial hemp, natural slaked lime and a mixture of minerals. The higher price this brick commands versus a traditional one is more than compensated by a series of advantages:

1) Growing hemp improves the condition of the ground. It is a robust and fast-growing plant that requires neither herbicides nor pesticides during its cultivation.
2) Industrial hemp has a very low thermal conductivity, producing a brick with vastly superior insulation properties against both cold and heat.
3) It produces no toxic by products and is fully recyclable
4) It absorbs sound and is non-flammable
5) It is a popular material in the cave houses typical of the area around Guadix, in Granada and it is also gaining ground in other regions around Spain, as it is especially suited to areas reaching extremes of temperature in summer and winter. It has even been used in the restoration of a monastery in the province of Palencia. Hemp bricks have also been used in projects in France and England

Categories

Hemp Building

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