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limestone or sand

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  • 27-03-2004 12:10am
    #1
    emmemm
    Closed Accounts Posts: 507 ✭✭✭


    Anyone know if its ok to use crushed limestone instead of sand for blockwork and plastering purposes?What mix should be used?


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    #2
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 90,946 Mod ✭✭✭✭Capt'n Midnight


    No idea,
    but sand is chemically inert* whereas limestone can dissolved by water over time, especially if it's acidic..

    *quartz compared to limestone


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    #3
    KoNiT
    Registered Users Posts: 578 ✭✭✭KoNiT


    Limestone can be used, but its burned to a fine powder, & I cann't rem the name of the "mortar"..

    Limestone was used before cement was around, if you look up OS maps you;ll see "LK" every now and again, these were lime kilns.

    A house in the C4 program "Grand Designs" had external walls constructed of natural stone & the limestone mortar, I still cann't rem name... The house framework was green oak, nice design.


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    #4
    Capt'n Midnight
    Moderators, Recreation & Hobbies Moderators, Science, Health & Environment Moderators, Technology & Internet Moderators Posts: 90,946 Mod ✭✭✭✭Capt'n Midnight


    Originally posted by KoNiT
    Limestone can be used, but its burned to a fine powder, & I cann't rem the name of the "mortar"..

    Limestone is CalciumCarbonate
    When heated it becomes QUICKLIME , CalciumOxide, mixed with sand and left (for Seven years in olden times) it chemically reacts with the sand to produce mortar.

    (Cement is slightly similar except other ingridents are mixed in and the furnace is even hotter and the reactions happen in the furnace rather than afterwards.)


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