Monday, 10 May 2010
The lime we are using is Singleton Birch NHL 5-Z, which is made in this county. We were choosing between this and the French made St Astier Lime. From what we have learned the St Astier lime has a greater compressive strength than the Singleton Birch and has a faster set. Roughly speaking the St Astier NHL3.5 is comparable to the Singleton Birch NHL5. This is because it is harder in this country to made a true NHL5. On the other hand, the Singleton Birch bulks up better, and produces a fatter, creamer mix. This makes is better suited to mortars.
Castle lime, which we will be using in the limecrete slab, comes from a similar region in France to St Astier lime and is better suited to things like limecrete slabs, where the greater thickness benefits from a lime with a faster set.