_Masonry Repairs in Traditional Buildings
I have always loved how lime mortar can be made from lime stones in a home made kiln in your back garden versus the industrialization that cement needs to be made. I thought it would be helpful to learn how to do this. So I went to the best. The Scottish Lime Center run these courses. We learnt how useful lime is and how to make it from scratch and use it in normal construction, especially in restoring traditional stone buildings.
Lime Mortar Masonry Repair Course
_This is an experiment to work out exactly how much binder you need to fill the air voids in the particular sand that you are using. Normally a 3:1 ratio is what you use = three buckets of sand to one bucket of binder, because 33% of the sand is air pockets. But sometimes it can be as much as 60%.
Is it important? If you are using cement mortar its not that important because its so strong. However, if you are using lime as your binder and you want your work to last hundreds of years, it's important.
It also shows how to mix a decent quantity of mortar by hand without breaking your back!