CCA and epoxy compatability

[PeterSibley]

Now I dont kow if this has been covered before,my seach wasn't productive.Its the kind of thing Richard Jagels would probably have dealt with in his Wood Technology column,here goes.
Has anyone experience of cold moulding using CCA or other preservative impregnated strips. At this stage it just an idea but the application would be a deck,probably 3 layers of 7 mm (around 5/16" ).Most of the light weight timbers available in Australia (at reasonable cost)are of limited durability.
How did it go? Did the preservative effect the epoxy bond?

[Dave Carnell]

The only problem I have seen with epoxy and CCA-treated wood is that the wood as purchased is often very wet. It won't bond in that state, but once dry is fine.

[imported_Conrad]

What Dave said- it glues up fine, with no reduction in strength, but you have to make sure the wood and treatment is completely dry.

[thechemist]

In the U. S. there is "pressure-treated" wood, which is impregnated with a mixture of CCA and a a paraffin-emulsion to render the wood water-repellent.

That stuff does not glue well, until it has weathered for a year to break down the surface wax. Even then, if you sand too far, you will find more paraffin inside, and again it does not glue well.

CCA by itself does not interfere with adhesives, so just make sure your wood was treated ONLY with CCA.

[PeterSibley]

Thanks for that....I propose sawing my strips to size,say 70 x 7 mm, then delivering them to the impregnation plant,they also have a choice of chemicals available.Thanks again.