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  • yeti bear commented on kludge77's instructable Gummy Bear Axe

    What if you casted a few dozen resen bears with mixed colors? Still have the look with more structure...

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  • the dam had cooling pipes in with the pour to remove heat from the concrete, this is true. However it was not to prevent the premature curing, it was to speed up the process. Curing concrete is an exothermic reaction, and without a way for the heat from the poured concrete to excape (imagine the whole dam done as one big pour) it would not set properly. Thats also why they poured blocks in place. If it had not been for the cooling pipes the dam would still be in the curing process (150 years was the estimate I heard)

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