WW2 German Stock mine manufacture

[BMG50]

I seem to recall an article a few years ago about how German stocks mines were manufactured but can't seem to locate or find it. I know they are made from cast concrete mixed with metal shrapnel but i am interested in the method and moulds that were used to make them. Anyone know or have such info.

 

[stecol]

I know two "recipes".

The first mixture for the body was composed of 600 g of concrete, 200 g of steel balls and 1200 g of small metal chips.

According to other sources the second mixture was composed by 200 g of concrete, 400 g of sand and gravels and 1500 g of small steel chips (2.5-3.5 g each).

Regards
stecol