On 29/09/2019 10:23, Tricky Dicky wrote:
Logic would suggest that if you have a DPM below the concrete then the only way out for the moisture is through the top surface. I believe curing time for concrete is 28 days.

I have not consulted this site in a while but checking it out may definitively answer your question;

http://pavingexpert.com/

Richard


I always thought proper drying time was a month per inch of concrete,
i.e. longer than you expect.

You can put a secondary dpc on top of the slab.