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Just realized my sand mix was off because of a humidity tip from a guy in Cleveland
He said my green sand was too wet for the humidity in our shop, which explained why my cores kept crumbling. I started checking the moisture with a simple squeeze test before each shift and it made a huge difference. Has anyone else had to adjust their sand prep for different weather?
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reese_lee298d ago
Man, that tracks. We had a batch of mortar go totally weird last summer because of a sudden humid spell. The bricklayer just kept muttering about the air feeling like soup.
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Forget humidity, check your sand's temperature before you even mix it. Cold sand straight from storage in a damp shop won't take water the same way, it just beads up. Letting the pile warm up to shop temp for a few hours fixed our inconsistent mold hardness last winter.
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