Thursday, March 20, 2014

Hemp, the building blocks of tomorrow?

Today, marijuana bricks were used to build eco homes in the province of Granada, Spain. Hemp as an industrial product has been around for thousands of years. After a period of decline it is now starting to show the re-emergence at the age of eco-sustainable building products.

Hemp is derived from the Anglo Saxon word 'haemp' and it is a popular name for plants of the genus cannabis. Hemp commonly refers to strains cultivated plant exclusively for industrial purposes as opposed to dealing with pot marijuana and similar drugs.

Hemp has many kinds of goods, but continues to be overshadowed by the marijuana definition of illicit drugs, which are often confused. But hemp can be grown legally, under license, in many countries, including the countries of the European Union and Canada.

Cannabis sativa L. is the variety grown primarily for industrial use, it is a fast growing plant and has been cultivated for thousands of years are used to make rope, clothing, paper, Hemp oil and medicines. Growing hemp improve soil conditions and reduce environmental pollution. It is a robust plant that does not require pesticides or herbicides during cultivation.

Hemp as an industrial material with ten thousand year history. The first recorded use of hemp as a cloth was found in China today 8000BC.C. Circa 4000B.C. flax to use, again in China, to make rope and food. 2000 years have passed, and hemp oil China used drugs. In 1000B.C. its use has spread to India and Greece where the first instance of hemp paper found.

In the 6th century hemp was used in Europe in some amazing things, in France flax reinforced bridge was built and is still used today. It is also used to make screens, caulking and fishing nets and lines. In later years hemp was used to make a variety of foods including butter and beer. In the 15th century Renaissance painter with hemp canvas.

Today industrial hemp is used to make a surprising range of products from medicines, products of personal care, building and insulation materials, clothing, textiles, food, fuel, fodder and bedding, plastic and paper.

In a brick building industrial hemp, because maintenance and excellent insulation properties, which are used to build the exterior and interior walls ecological house. In the area of ​​Spain the outer wall of the house is made of eco eco-bricks, manufactured in Guadix Cannabric • the name belongs.

• Cannabric derived properties of industrial hemp fiber (cèèamo). The eco-bricks are made of industrial hemp, natural slaked lime and mineral mix. Combines the functions of a load bearing brick walls are fire resistant and do not require additional thermal or acoustic insulation.

The most important part of the eco-bricks industrial hemp has very low thermal conductivity (0.048W / m • k) provides the bricks that have vastly superior insulation properties against both cold and heat. Mineral component of bricks gives them their mechanical strength. Being a solid bricks, with a high specific heat, thermal properties optimized to protect against heat.

These features make it an ideal choice hemp bricks in southern European regions where there are extreme temperatures during summer and winter.

Mechanical strength of the block begins with the formation of soluble hydrate. Strength increased from time to time with the carbonation of free lime (slaked lime generates a) by moisture and carbon dioxide present in the air. Another important factor in the treatment of progressive eco-bricks gradually petrified of industrial hemp with lime and minerals on the bricks.

Because of the unique composition of marijuana bricks allows sweat and water vapor diffusion between the inside and outside of the building equalize the moisture in the building to avoid the area damp and cold and contraction of condensation on the inner surface of the wall .

Slaked lime acts as a binder, essentially holding the bricks together, but it has other uses. Be slaked lime acts as a filler to protect against water ingress bricks through outer surfaces exposed to rain and snow. On the other hand it provides protection for industrial hemp fiber attack by fungi and parasites.

Hemp bricks are mainly used for the construction of the exterior walls at home cave ecology. Fun, famous cave home region of Andalusia natural ecology in which they are built again from the ancient cave houses abandoned. Where ever possible the construction materials used were salvaged from derelict property destroyed. Again to minimize the impact on the environment.

It is ironic that this region of Spain, Altiplano, until the end of the nineteen sixties, is well known as a region growing industrial hemp. Hemp growing season ended with the introduction of nylon, the mechanization of agriculture and the growing freedom movement coincided with the end of the Franco regime. The combination of these factors throw a large number of agricultural workers lost their jobs. The population of many villages down 75 percent or more, the majority of the population migrate to the coast and major cities to look for work.

As a result of traumatic changes in the demographics of the remaining population, particularly age, income down in a village near the level of poverty and many empty houses fell into disrepair.

Most workers who transfer land to stay in a cave house which is now being revitalized by the demand for eco-property.

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