AGM and Talk — Rediscovering the lost art of renovation and conservation
Professor Geoffrey Allen, University of Bristol
Venue: BAWA Filton
Wednesday May 19, 2010 at 19:30
When the Roman Empire fell the ‘secret’ of hydraulic cement disappeared with it. Cements continued to be used but their quality depended on the
chemistry of the limestone in the local quarry. Following experiments on hydraulic limes capable of resisting the action of seawater, Smeaton
constructed the highly successful Eddystone Lighthouse. In 1845, Johnson’s experiments with higher calcining temperatures provided the
basis for Portland Cements. Increasingly though in recent years it has become recognised that for the restoration and conservation of pre-
Victorian buildings, hydraulic limes must be used to match the properties of the original construction. This lecture describes the way in which
these materials are produced and their mode of application in modern construction and conservation with examples of the restoration of the
mosaics of San Marco in Venice.
The talk will be followed by a discussion and buffet.
Members and non-members are welcome.
|Eddystone Lighthouse||Colosseum Rome|