Material composition and purpose of using the materials.
|Material||Ratio per batch||Weight of material per wheel barrow (kg)||% of total weight of materials||Purpose of using the materials|
|Clay||3||106.6 × 3 = 319.8||70%||Clay is chosen due to its relatively low thermal conductivity ≤2.5 W/ (m.K) at 500 °C and reddish colour after firing.|
|Sand||1||106.8 × 1= 106.8||23%||Sand adds roughness and strength to the wet clay and prevents cracking|
|Sawdust||1||31.3 × 1= 31.3||7%||The ceramic liner becomes porous when sawdust is included.|
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