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Post by lollygagger on Nov 8, 2017 16:36:07 GMT
I have 3 strangely heavy bricks (ballast). They are 10" x 5" x 2.5" and weigh 15kg each. A bit like engineering bricks but heavier still.
Two have a large V cut out at one end.
I meant to take a photo. I was wondering what they could be.
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Post by lollygagger on Nov 8, 2017 16:53:54 GMT
I calculate the density to be 7323kg/cu m which is approximately 3x the density of blue engineering bricks (2405kg/cu m), but bricks they are.
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Post by Deleted on Nov 8, 2017 18:56:39 GMT
Storage heater bricks?
Bonded magnetite bricks apparently.
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Post by lollygagger on Nov 8, 2017 19:11:57 GMT
Storage heater bricks? Bonded magnetite bricks apparently. I think you are correct, 5500kg per cu m. My bathroom scales could account for that. I'm looking forward to testing with a magnet tomorrow. 👍 |
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Post by Deleted on Nov 8, 2017 19:13:47 GMT
Its something I have heard suggested before for ballasting as you get high density in a small convenient package. I don't know if they are magnetic but I expect so !
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Post by Deleted on Nov 8, 2017 19:14:28 GMT
I think they are filled with gold. It would be a really good way to hide your wealth - building your house of bricks which just look like bricks. Get a hammer and chisel and break them open to find out. Or lead stolen from roofs. |
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Post by lollygagger on Nov 9, 2017 9:07:52 GMT
Just posting to confirm that they are indeed magnetic, so that's that sorted. I'll be keeping an eye out for more of these.  |
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