The acceptable standard is 4:1 (That is 4 wheelbarrows of sand to TWO bags cement) as the volume of a wheelbarrow is roughly double that of a 50kg bag of cement.
Lots of builders get "confused" by this.
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Vitcas Heatproof Screed is suitable for outdoor oven a
Unfortunately not. You require a 0-4mm sharp sand which can be purchased through most builders merchants. The mix should be approximately 1:4 Cement / Sand ratio. Mix to an earthy consistency and compact well. The cement is the conductor of the heat. Good luck with the project.
1 to 4
1:5 (cement:sand) is the best ratio
upto M25 it is nominal mix but after that are the design mix which need to becalculated.....