Maybe a climate thing, but my previous employer had an old Hugh payloader that we used to push/aerate/load chips and composted chips. With a machine that large we were able to get stacks 15-20 feet high. Never once had an indication of combustion.
Interesting note; mid January/February temps as low as -35C and after breaking a crust 16-18 inches thick that pile would steam like a massive sauna. If you sat in the middle you couldn't see out (or breath). |