What is vermiculite

Vermiculite is a mineral formed mainly of magnesium and aluminum hydrosilicates that contain crystallized water. These elements join together giving rise to lamellar shapes rich in interspaces that are filled by the zeolite water. Vermiculite is rarely used in its natural form, in most cases it undergoes an exfoliation process. During this treatment the mineral is subjected to high temperatures and the lamellae expand up to almost 30 times and the zeolite water evaporates, this process determines the formation of a series of micropores that allow the vermiculite to have excellent insulating properties at a specific weight. really low. On our planet the main deposits are found in North and South America, in South Africa, in Russia,

Properties of vermiculite

The vermiculite that we find for sale from the wholesaler is sold in large bags, it looks very similar to gravel, it is quite light, it is formed by crusts that when pressed become golden dust, so they are quite tender. These crusts seen closely appear as many overlapping lamellae, with a color ranging from yellow to very light brown, and appear to shine. The vermiculite that we find on the market is the expanded one, that is the one that has undergone the thermal process. Expanded vermiculite is a type of mineral of volcanic origin. This type of mineral has a pH that varies between 6 and 9, has no particular odor, does not age, and is absolutely not flammable. Furthermore, in its expanded form it appears insoluble in water, does not contain asbestos particles, and is sterile.

Agricultural uses of vermiculite

Vermiculite has also found widespread use in the agricultural sector. In fact, this mineral retains water and therefore during watering it first absorbs it and then releases it slowly. This ability is really of great use in the sowing period and is very suitable especially for the cultivation of plants. Usually farmers place vermiculite on top of the soil in order to inhibit the evaporation of water and with the concrete possibility of reducing the number of waterings. Furthermore, this natural element increases the flowering speed of the shoots and protects them from fungal attacks. Vermiculite does not deteriorate, it is not toxic to the soil and therefore it is a very useful element for sowing.

Vermiculite: Building uses

Vermiculite is a mineral used extensively in the construction industry. It is used in most cases as an insulator both from a thermal and acoustic point of view. In addition, it has breathable properties with consequent humidity control, and is often inserted in grains inside the structures that make up the perimeter of the houses, for the flues and for the part below the roofs. The quantities of vermiculite necessary for these types of work are really high, just think that for the thermal insulation of terraces, attics or open spaces it is necessary to use about two hundred kilograms of this mineral. Fortunately, in nature there is really an abundance of it and therefore there is no problem that it can be easily exhausted.

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