Thai Pottery

Lime Kilns

These kilns were on the road between Saraburi and Korat in 1989. The process is that you take limestone CaCO3 and heat it to about 843 ˚C (1550˚F) and it becomes quicklime. The quicklime is slaked in water becomine slaked lime, calcium hydroxide which is cementatious. The slaked lime is usually mixed with sand to become stucco or mortar. Fresco is typically done on a slaked lime. Prior to the development of Portland Cement in 1824 it was the main cementatious agent in building with bricks. It remained as the main cementatious agent in more remote states in the US into the 20th Century. It is still used in many applications. Like Portland cement it can be more efficiently made in rotary kilns and other contiuous manufacturing techniques where waste heat is reused.

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