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Civil - Construction Materials: Stones, Bricks,Concrete Blocks

Bricks Tempering

   Posted On :  14.07.2016 07:48 pm
Bricks Tempering

Tempering consists of kneading the earth with feet so as to make the mass stiff and plastics (by plasticity, we mean the property which wet clay has of being permanently deformed without cracking).

Manufacturing Of Bricks 


Tempering:


Tempering: Tempering consists of kneading the earth with feet so as to make the mass stiff and plastics (by plasticity, we mean the property which wet clay has of being permanently deformed without cracking). It should preferably be carried out by storing the soil in a cool place in layers of about 30 cm thickness for not less than 36 hours. This will ensure homogeneity in the mass

 

of clay for subsequent processing. For manufacturing good brick, tempering is done in pug mills and the operation is called pugging.

Pug mill consists of a conical iron tube as shown in Fig. 6. The mill is sunk 60 cm into the earth. A vertical shaft, with a number of horizontal arms fitted with knives, is provided at the centre of the tube. This central shaft is rotated with the help of bullocks yoked at the end of long arms. However, steam, diesel or electric power may be used for this purpose. Blended earth along with required water, is fed into the pug mill from the top. The knives cut through the clay and break all the clods or lump-clays when the shaft rotates. The thoroughly pugged clay is then taken out from opening provided in the side near the bottom. The yield from a pug mill is about 1500 bricks.


Tags : Civil - Construction Materials: Stones, Bricks,Concrete Blocks
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