How do you install astro-turf and is it dog-digging preventative?

Astroturf is essentially outdoor carpet. It is meant to be laid over a hard surface like asphalt. It might prevent your dog from digging where it is laid, but that doesn't mean your dog can't damage it by trying to dig. Take to heart what the first answerer said about providing your dog with something to do. Try to figure out why your dog is digging, and try to address the cause not just the symptom.