QUIKRETE Refractory Mortar Mix

[Dutchoven]

I call it creamier...a mason friend of mine always said use type N unless there is some very specific reason to use something else...a mantra I have tried to remember
Best
Dutch

[slbrickman]

If calcium aluminate has been added to the fire clay you could experience something called "flash curing".

[MAVANO]

Ok let me get this, type N mortar mix is- 1part portland 1part lime is it 3 or 6 parts fine sand

[Dutchoven]

Originally Posted by MAVANO

Ok let me get this, type N mortar mix is- 1part portland 1part lime is it 3 or 6 parts fine sand

The recipe for type N for general bricklaying(to the best of my knowledge) is 1portland/1 lime/6 sharp sand...some older mason's around here say between 6 1/2 and 9 parts sand...but again for general bricklaying...for the oven chamber the recipe should be 1/1/3 with 1 part fireclay
Best
Dutch

P.S. As far as I know the Quikrete masonry mortar mix(the just add water type) in Lowe's or Home Depot would be with 6 parts sand