- 2078 Kartik · 3 marks
Preparation of clay for bricks
Short answer
Clay preparation involves removing topsoil, digging, removing impurities, weathering for months, blending with necessary materials, and tempering with water to a uniform plastic mass ready for moulding.
Explain briefly the operations involved in preparation of clay for the manufacturing process of brick.
The clay is prepared in these operations.
- Unsoiling: the top 200 mm of soil containing impurities and organic matter is removed.
- Digging: clay is dug up and heaped in lumps of about 300 to 400 mm.
- Cleaning: stones, roots, pebbles and lime lumps are removed by hand.
- Weathering: the clay is exposed to rain, sun and frost for a few weeks (up to a season); this makes it more uniform and breaks lumps.
- Blending: different earths are mixed and sand or ash is added if needed to improve composition.
- Tempering: water is added and the clay is kneaded by feet, spades or pug mill until a uniform plastic mass is obtained, ready for moulding.
✓ Answer checked by Claude Opus 5.5 (high effort)
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