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I'm building a house (brick, cement and concrete) and I have a big pile of wood used for beam and pillar molds.

How can I properly clean cement off wood? I think it should be very damaging to blades in general (planer, table saw, etc), and sanding it out wouldn't be very effective.

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2  
Its too late now, oil (motor oil) wood before using as concrete form. –  HerrBag Jun 7 '13 at 20:52
    
Do you need the wood at a standard size? If not, resawing with a cheap blade (after knocking big pieces off, ala longneck) –  HerrBag Jun 7 '13 at 21:02
    
Not really, is just wood that I want to re-use. In this case the problem is that I don't have a bandsaw. They don't have chunks of cement attached, is more like cement that was in contact, smeared or dripped. –  Luiz Borges Jun 7 '13 at 22:30
    
@herrbag but then you're left with oil-soaked wood. Sounds worse that concrete. ;) –  DA01 Jun 8 '13 at 2:05
    
@DA01 you pretty much commit the lumber for form use. It would burn nicely. –  HerrBag Jun 8 '13 at 18:19

2 Answers 2

up vote 1 down vote accepted

You could try X'Crete which is advertized as suited to removing concrete from forms. It dissolves the concrete into a slush you can rinse away. There's probably other similar products.

Or a more hard-core approach would be to use Muriatic Acid; apparently that's what masons use to clean their stuff. Downside being it's dangerous.

A more tool-oriented approach would be a belt sander with a low grit paper. Belt sander don't care.

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Knock it off with a chisel and a hammer, then plane it.

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3  
not with my planer –  HerrBag Jun 7 '13 at 20:49
    
Edit: Knock it off with a chisel and hammer, then plane it using the plane you borrowed from that neighbor you don't like. –  DA01 Jun 8 '13 at 21:12

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