The Useful Properties of Clays
The Useful Properties of Clays
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In our eReader you can find the full English version of the book. Read The Useful Properties of Clays Online - link to read the book on full screen. Our eReader also allows you to upload and read Pdf, Txt, ePub and fb2 books. In the Mini eReder on the page below you can quickly view all pages of the book - Read Book The Useful Properties of Clays
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The particles which are active in forming coherent masses are highly hydrated, that is? they contain so-called water of combination, which disappears into some sort of porous structure too fine to be seen even under the most powerful microscope. Clays, even when thoroughly dried in the sun and air so that they have every appearance of being dry powders, will sometimes contain as much as 12 or 14 per cent of this combined water. If the clay is heated to a sufficiently high temperature to drive o...ff this water all plasticity and clay likeness is gone. Thus brick dust is no more plastic than sand or glass-powder. The particles have not become crystalline by heating, but the active hydrated particles have been changed into dead amorphous ones. These active particles which become coherent when wet are called colloid (which means glue- like), to distinguish them from the inactive crystalline and amorphous grains which are also present in almost every clay.
BINDING POWER.
It is this property which provides strength in the air-dried clay so that articles fashioned of it can be transported to the kiln without crumbling and breaking.
What to read after The Useful Properties of Clays?
You can find similar books in the "Read Also" column, or choose other free books by Allerton Seward Cushman to read onlineMoreLess
To quickly assess the difficulty of the text, read a short excerpt:
The particles which are active in forming coherent masses are highly hydrated, that is? they contain so-called water of combination, which disappears into some sort of porous structure too fine to be seen even under the most powerful microscope. Clays, even when thoroughly dried in the sun and air so that they have every appearance of being dry powders, will sometimes contain as much as 12 or 14 per cent of this combined water. If the clay is heated to a sufficiently high temperature to drive o...ff this water all plasticity and clay likeness is gone. Thus brick dust is no more plastic than sand or glass-powder. The particles have not become crystalline by heating, but the active hydrated particles have been changed into dead amorphous ones. These active particles which become coherent when wet are called colloid (which means glue- like), to distinguish them from the inactive crystalline and amorphous grains which are also present in almost every clay.
BINDING POWER.
It is this property which provides strength in the air-dried clay so that articles fashioned of it can be transported to the kiln without crumbling and breaking.
What to read after The Useful Properties of Clays?
You can find similar books in the "Read Also" column, or choose other free books by Allerton Seward Cushman to read onlineMoreLess
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