What is the difference between hydraulic and hydrated lime ?
hydraulic lime and hydrated lime are both normally available as powder supplied in 25kg bags. Both can be used for making mortars, however hydraulic lime has a degree of cementitious set when in contact with water (or atmospheric moisture), it also sets by combining with atmospheric carbon dioxide to some degree. Hydrated lime does not set in the prescence of water, it sets by combining with carbon dioxide in the atmosphere to turn back into chalk or limestone.
