Originally Posted by Scout
How critical is the sand, in it's cleanliness? We have lots of sand on our place, all colors. Seems to me that if I sift it, it ought to suffice.
Make sure the sand is not somehow contaminated by sea salt if you are anywhere near the ocean, there was salt water near by, or this sand had been trucked in and placed there for "fill" or something.
Years ago a friend in Oregon got a load of sand that apparantely originated from the coastal/beach area, turned out it was contaminated by salt from salt water and his concrete turned out very poor. If in doubt buy some bagged sand if you don't need lots of it