Date: Mon, 27 Jan 1997 11:30:37 PST From: BMEvans <B.M.Evans@exeter.ac.uk> To: cp@opus.hpl.hp.com Message-Id: <aabcdefg390$foo@default> Subject: Sandblasting sand
There could be problems using some sandblasting sands, since they sometimes contain a large proportion of crushed
slag from industrial boilers -- the grain shape is angular and so ideal for abrasion. The problem is that these slags
usually contain heavy metals and sulphur compounds, which will leach out in the acidic CP soil.
There was an incident last year in south west England in which a bridge was blasted, and the sand/slag seriously
damaged a botanical nature reserve below.
So if possible its best to check that it is pure sand that you are buying.
Regards to all,
Brian
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