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Re: Beach Sand

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Beach sand can be washed to remove chlorides and other potentially damaging 
salts -- for a small project, you can wash the sand in batches in a barrel 
mixer.  You can test the effectiveness of the washing process by looking for 
white salt deposits to show up at the edges of a pile as the sand dries.  You 
can use the test to determine how many wash cycles are needed.  Discard the 
wash water, of course.

Salt is potentially damaging to embedded steel such as reinforcing and anchor 
bolts.

Beach sand may not be size-graded properly for use as fine aggregate in a 
good quality structural concrete.

Nels Roselund
Structural Engineer