The main purpose of this study was to observe the influence by different surface working methodson behaviour, durability and appearance of lime-based stone-repair mortars.The findings are based on:
- Observations made during restoration work
- Observations from field stations
- Microscopic analysis of thin sections of mortar
- Parallel studies on lime plaster
The results show clear differences in durability, appearance and behaviour of lime-based mortar dependingon at which stage of the drying process the mortar is worked on. For achieving durable mortar it is importantto avoid the development of a surface lime-film. The study implies that the mortar, only when worked on at aspecific stage of drying, will be durable and have a structure, texture and porosity compatible with the surroundingstone material.
Proceedings of the International Conference of Heritage, Weathering and Conservation HWC-2006, Madrid, Spain 2006.