I used, what we called a coal-shovel in my youth after i broke the plastic snow-shovel. That coal-shovel has a straight edge and is made of iron of some kind. Heavy as a grizzly-bear just before hibernation and sturdy as a Sherman tank.
The ice-plate on my driveway didn't stood a chance! - Same as my back and my shoulders…
And then i applied a generous amount of de-icing salt-mix to the parts where a thin layer of ice was still hanging on to the concrete.
I seriously thought about to use a diesel/gas mixture or explosives…
And then look about that chit:
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Since i live here since 2018 we have never had temperatures approaching negative 20° Celsius!
This morning the electric heater barely kept the part of my patio that i sectioned off for the swiss-chard plants above freezing.