I worked for a water damage company, we dealt with a lot of busted sewer pipes in crawl spaces. The only time we recommended lime was when the individual didn't have the resources to hire us yet needed a quick fix. We would suggest the lime to help reduce the smell and eat away at any bacterias then cover with 4 mil plastic from Lowes. I really don't think the lime will do more than the plastic when it comes to moisture but lime is cheap so if it makes you feel better I don't think it would hurt anything to spread some out.