Hydrated lime
Short Guide, Lime Mortars in Traditional Buildings, published on 1 March 2013 by Historic Scotland, defines hydrated lime as: ‘Powdered lime formed from the slaking (addition of water) of quicklime. This term may be used in reference to hydraulic limes or air limes, but is typically used for the latter.’
Short Guide: Traditional Scottish Brickwork, published, on 1 March 2014 by Historic Environment Scotland, suggests that hydrated Lime: ‘Commonly used to describe non-hydraulic lime powder which is used in modern cement/lime/sand mortars. It is important to distinguish between this and hydraulic Lime which is the material most commonly used in lime mortar mixes in repair work.’
Society for the Protection of Ancient Buildings (SPAB) definition online Glossary : Hydrated lime or dry hydrate
'Calcium hydroxide (Ca(OH)2) formed as a dry powder when any lime is slaked using an exact amount of water (cf lime putty). Not to be confused with hydraulic lime. It is possible to obtain hydrated hydraulic lime or hydrated non-hydraulic lime.'
[edit] Related articles on Designing Buildings
Featured articles
Check out some of the best features and news from Designing Buildings as well as key stories from around the web.
The Building Safety Regulator announces a call for evidence.
Government approach could undermine delivery and regeneration.
World's first mass timber data centre.
The overlooked environmental aspect of data centre development.
Introduction to radon awareness
New technical information sheet published by CIOB.
Updated supplier guide can help electrical contractors engage with NHP.
CIAT confirm the winners of the 2026 architectural technology awards.
Government launches a one stop shop for flood preparedness.
Sir Edwin Lutyens: Britain's greatest architect? Book review.
CIOB publishes free template to help assess and manage risks.
ECA's reflections on Party Conference season
Burnham wants to be confident of winning before asking for a fresh mandate.
New Chief Construction and Scientific Adviser
Sergio Cavalaro, Professor of Infrastructure Systems at Loughborough University.
Building safety levy for England
CIAT publish estimator tool for members.