Had some lime putty stewing away for some time but need to double the quantity to make enough lime mortar for internal chimney repair.I threw away the old bag with the make on,it was green&white.Just picked up a bag of Cemex Rugby hydrated lime,the label on which points more towards agriculture than building....has anyone used that particular make for creating lime mortar and if so how were the results?
Did a dummy run with the old lime putty,3 parts lime putty to 1 of sharp sand.Leaving the bricks for a week and then will see how strong or flaky the mortar is.May have to use a catalyst as I understand both lime and sand are often too pure nowadays.Don`t really want to use any cement but also did a 9 parts sharp sand,1 cement,1 lime putty mix and it set well but too grey for the job.I need to retain the breath-ability,flexibility and look....or else I would just muck about with cement.
Any advice would be appreciated.Thanks.
Did a dummy run with the old lime putty,3 parts lime putty to 1 of sharp sand.Leaving the bricks for a week and then will see how strong or flaky the mortar is.May have to use a catalyst as I understand both lime and sand are often too pure nowadays.Don`t really want to use any cement but also did a 9 parts sharp sand,1 cement,1 lime putty mix and it set well but too grey for the job.I need to retain the breath-ability,flexibility and look....or else I would just muck about with cement.
Any advice would be appreciated.Thanks.