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different types of Portland

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  • different types of Portland

    Hi. One more question about materials, please. I'm pretty much set to try the home brew for a castable oven. Searching around for the topics about home brew I saw a comment about there being different types of Portland. I bought this: http://www.holcim.bg/en/products-and...-ll-325-r.html from my local supplier. Can anyone tell if this is what I want for my mix, please? thanks, bob.
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