Hot Mixed Mortars

Hot mixed lime and earth-quicklime mortars were the stuff of building construction across the world until relatively recent times. Hot mixed lime mortars were not uncommon as late as the 1950s; earth-lime mortars were the norm for masonry construction across Europe until at least 1800, always in association with hot mixed lime pointing, renders and plasters. Both have been substantially ignored by the conservation world and with it the implications of using 'like-for-like' mortars with minimal historic precedence for use in the air and - in the case of NHLs - of dubious compatibility. Quicklime mortars are cheap and easy to produce; they enjoy necessary high free lime content (crucial for effective porosity), are eminently workable and adhesive, as well as being highly cohesive and can be readily gauged with pozzolan for exposed or underwater use. They are like for like and eminently compatible with earth and lime built fabric of all periods.

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