For traction in order to make it safer so a person will not slip on slick ice .
gRit
On ground near a pond
yes you can
I am not 100% sure but i would suggest you try and put a little bit of grit on it (if there is a supply of grit nearby), let it thaw a little and turn the engine on (put the heat full blast
sand grit (the stuff that they put on snow)
you can put grit down chinks of salt down and gravel down
Sand is much heavier than grit. Sand should be used if you're trying to weigh something down.
Although it says razor compatible it should still fit grit because they are the same width
Not really. It is more fibrous and is likely to have more 'grit' from being in contact with the ground, but it isn't toxic.
ppc cement
your feet should be flat on the ground to create good posture