Good Practices & User Guidelines
1. Know your Binder,
their origin and their specifications
70 to 80% of a Render/Mortar is made with Sand !
2. Aggregates Define:
- Compressive strength
- Compatibility with support
- Water retention
Vitruvius said :
“In buildings of rubble work it is of the first importance that the sand be fit for mixing with the lime, and unalloyed with earth”.
he further stated
“Thought pit sand is excellent for mortar, it is unfit for plastering for being such a rich quality, when added to the lime and straw, its great strength does not suffer it to dry without cracks.”
Source: Scottish Lime Centre
About Colour Additives
Additives color with non-organic pigments only (to avoid colour degradation).
Inorganic pigments only! Based on Oxides: Iron, copper, chromium, manganese, cobalt, nickel, etc.
4. Water proportion is crucial
Lime requires less water than cement!