Later On

A blog written for those whose interests more or less match mine.

Close-up on clay: From making wine to managing mine waste, clay is important for many industries

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In The Conversation Jason Ng and Andrea Sedgwick have an interesting article on clay, though oddly with no mention of its use in shaving soap. It begins:

The discovery and use of clays dates back to 30,000 years ago, making clays one of the oldest materials used in society. Clays are naturally occurring materials that were first used to make pottery and are now used abundantly in the manufacturing of goods, including ceramics, cosmetics and building materials. Clays also play an important role in the “terroir,” the features a wine develops based on where the grapes are grown.

Clay has unique properties that are useful in industries ranging from manufacturing to construction. But these properties can also pose a challenge in managing mine waste.

Clays and clay minerals are tiny particles with a unique plate-like structure less than two microns in size (for comparison, the average thickness of a strand of human hair is about 70 microns). The small size of clay minerals and their distinct structure give them unique properties, and different types of clay minerals can exhibit diverse characteristics.

Properties of clays

There are four main groups of clay mineral: kaolinite, illite, vermiculite and smectite. . .

Continue reading.

There are many varieties, though: Bentonite, Rhassoul, Hectorite, brown, red, green, black, talc, and others.

Written by Leisureguy

3 May 2021 at 9:28 am

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