AC1 Smeaton project on historic mortars durability This research
investigated the effects of additives to non hydraulic (air)
lime-based mortars in terms of durability and workability. Phase
I of the project was completed in 1995 and results have been
published in the newsletter of the British Building Limes Forum,
in Europe in EUREKA, Eurocare's Eurolime newsletter, and in the
Bulletin of the Association for Preservation Technology.
Conclusions of Phases II and III have been drawn up and papers
were presented at the 7th International Conference on the
Durability of Building Materials and Components, at Stockholm,
Sweden (edited by C. Sjostrom. London: E&FN Spon 1996), and at
the APT conference in Chicago (1997) the paper will be published
in a future edition of the APT Bulletin. A summary of progress
in all phases to date will be published in the Research
Transactions Vol II & III,1998. Indications are that small
quantities of cement (ie. less than a proportion of 1:3:12 of
cement:lime:sand) are unexpectedly