Homebrew?

[TropicalCoasting]

Can someone post the actual recipe in this thread so it can be searched in the future ?

[Amac]

3:1:1:1
sand : fireclay : portland cement : hydrated lime

Mix first then add water as required - and mix to a workable consistency. This bit is not so exact. You don't have to adhere (sorry) exactly to the recipe. More fireclay is said to add to stickiness,
Amac

[Tscarborough]

That is a good article, but it really has no relevance to refractory mortars. Here in the states, in recognition of exactly what the article discusses, the specification is "from 2-1/4 to 3 parts sand by volume of the cementious materials".

[TropicalCoasting]

Originally Posted by Amac

3:1:1:1
sand : fireclay : portland cement : hydrated lime

Mix first then add water as required - and mix to a workable consistency. This bit is not so exact. You don't have to adhere (sorry) exactly to the recipe. More fireclay is said to add to stickiness,
Amac

Thanks and future googlers will thank you too