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Adding a little fire clay to mortar?

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  • Adding a little fire clay to mortar?

    Hey Gang,

    about to start laying floor, and I chose a little red fire lay to mix with sand for the initial base.
    but I was thinking, I like the red colour, and can I add a bit to my bagged fire lay I bought. Just for a little tint or would that compromise the formula in the bag?
    im assuming yes, but not sure if anyone tried it…

    thanks

  • #2
    Click image for larger version

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ID:	454047 It shouldn't matter, but not to exceed 10% by volume in any mix.

    Here's a great study of the effects of clay in mortar, done way back in 1909
    Attached Files
    Last edited by david s; 06-19-2023, 10:20 PM.
    Kindled with zeal and fired with passion.

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    • #3
      Very useful. Thanks

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