Pumice-lime / Scoria-lime — 6 Comments

  1. I found a recipe for pumice geopolymer which uses pumice, Lye (sodium hydroxide NaOH), and Sodium Silicate (Na2SiO3) The sodium silicate is the problem here in that to make it, there is a process where it gets heated in a furnace. So although mostly this recipe is low temp, all of it is not. The pumice geopolymer however shows matching strength of portland cement after 28 days. Here is one recipe I found to make the sodium silicate….. maybe someone could come up with a better/easier recipe for it?

  2. Here where I live, I have only seen Lime Type S in a solid bag so I dont know what color or texture it is without buying it and taking my chances. It is about $10.00 US dollars for a 50lb bag

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