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The earth, if properly dried, can become an excellent material for green building, in fact it can be distinguished by resistance and thermal insulation. There raw earth looks like a return to the origins, an innovative but natural material that brings benefits to human health and the environment.
Is called raw earth because it is naturally dried and unfired clay. The oldest archaeological find dates back to 8,000 BC. therefore it is clear that it is a material widely used in the past. In technical terms the raw earth it is clay mixed with vegetable fibers such as hemp, wattle or straw; the raw earth is also composed of other aggregates such as sands of various granulometry and gravel. It is currently having a lot of success in the field of green building because having a neutral pH, it is compatible with any other material and is well suited for masonry, flooring, for the creation of screeds and panels, for filling but also for plasters and finishes. In short, an ecological material with a thousand uses.
Unfortunately, Italian law does not consider the raw earth a building material, therefore houses entirely made of raw earth, however this material is considered "from construction”In countries such as France, Germany and Switzerland. In Italy there are thousands of "historic" buildings built entirely in raw earth and regularly inhabited.
According to experts, the raw earth it acts as an excellent thermal insulator, so it is not only ecological because it is not polluting but it is also ecological because it could help green building in the construction of increasingly self-sufficient houses. The high thermal regulation is given by the fact that the bricks in raw earth have a mass equal to twice that of a traditional terracotta brick and results in a more constant temperature and greater protection against humidity: once a certain temperature is reached, theraw clay it tends to maintain it and not to dissipate thermal gradients.
There Raw Earth it is an ecological material offered by Mother Nature, in addition, since it is a mixture, it could enhance the precise characteristics by increasing or decreasing the quantities. For example, the raw earth rich in vegetable fibers of straw, it is more suitable as an insulator while a raw earth with fine sand, it could be ideal for finishing. The difference between blend and blend constitutes a limit in what is large-scale production but undoubtedly it is an advantage for targeted construction. This distinction is totally absent when it comes to concrete, which is also why cement is the most widespread and certainly the cheapest material. When it comes to raw clay, the raw material is very cheap but the finished product is quite expensive in the construction field due to the absence of a large-scale production chain.
edited by Anna De Simone