DEFINITIONS 



ized so that it can be distributed. It is car- 

 bonate of lime (CaCOs), or a combination 

 of calcium and magnesium carbonate, and 

 in a way has a right to be designated as 

 "lime," but such use leads to confusion. 



Fresh Burned Lime. Calcium oxide 

 (CaO) formerly was accurately designated 

 as "lime," but the words "fresh burned" are 

 often prefixed to prevent confusion with 

 lime carbonate or the hydrate. It is known 

 as "lump lime," "caustic lime" and "stone 

 lime." 



Ground or Pulverized Lime. Fresh 

 burned lime may be ground fine, so that it 

 can be spread on land without slaking. 

 This product should not be confused with 

 ground limestone or hydrated lime. Fresh 

 ground lime is worth nearly twice as much 

 per ton as ground limestone, but some of the 

 product on the market is far from pure. 

 There is opportunity to grind up unburned 

 and waste material with the caustic lime, 

 and this form of lime usually contains some 

 hydrated material. 



Hydrated Lime is the compound formed 

 by the action of water or steam on fresh 

 burned lime. 



Air-Slaked Lime is a compound formed 



31 



