Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Concrete Engine Block with Liners

  1. Feb 10, 2009 #1
    Is it useful to build my own engine block from concrete , liners inside.
    Concrete is cheap , high resistant to pressure and high heat .

    Best regards ,

    Mustafa Umut Sarac

  2. jcsd
  3. Feb 11, 2009 #2
    High porosity, very low tensile strength, etc.
    You might be able to fashion one that functions for a (very) short time, but I can't imagine any serious reason to try.
  4. Feb 11, 2009 #3


    User Avatar
    Staff Emeritus
    Science Advisor

    Well, concrete is relatively inexpensive compared to metal alloys and engineering ceramics, and it would be a relatively good insulator compared to metal.

    But concrete doesn't handle tension too well, and I image thermal fatigue would be a problem.

    A metal liner would be necessary to maintain a smooth (minimal friction) bore in the piston chamber.
  5. Feb 11, 2009 #4


    User Avatar
    Science Advisor
    Gold Member

    Sure concrete is cheap when you're making a sidewalk, but I seriously doubt it would be cheaper when you tried to manufacture an engine block out of it. As with most precision parts, the expensive part of making an engine block is not the material, its all of the manufacturing and machining processes that go into making it.
  6. Feb 11, 2009 #5
    I researched concrete technologies little bit to make my boat.
    First thing , I learned that concrete is fire proof.
    At a fire , heat is enough to melt a aluminium block but no wear to concrete.
    Second thing is to make it strong. At nato bases or us embassies they use bomb proof or missile proof walls. They make it with adding high concentration of steel fibers.
    Even there is ultra high flexible concrete at the market also.
    Problem is to keep metal parts modular , i mean installed on to the concrete mass by epoxy adhesive.
    I think factories dont use concrete because it is slow to cure but you can save from time with less paying to shaping machines.

    Best ,

    Mustafa Umut Sarac

Share this great discussion with others via Reddit, Google+, Twitter, or Facebook