It does dry Al, but I can say for a fact that concrete does not cure to the degree it does in other environments. I myself am not a concrete expert, but know a few men in the business. One owns a company by the name of Keystone Block, they manufacture block obviously. Another owns a company that pours commercial concrete jobs (malls, schools, government projects, etc), the last that comes to mind owns a company that manufactures highway barrier. Ive asked each of them in conversation because I have wondered many times over the years if concrete is a good solution to tree issues. Personally I hate concrete in trees, for obvious reasons. BUT, though I despise it, Ive wondered if it really is advantageous. None of those guys could speak for whether or not it is wise in trees, but each have said they don't believe it cures to its potential in a tree. Its strong, I do know that, but in most cases doesn't reach its full strength.