On 29/09/2019 14:24, The Natural Philosopher wrote:
On 29/09/2019 14:07, Robin wrote:
On 29/09/2019 13:17, Andrew wrote:
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.

where then would the moisture go?
Doesnt need to go anywhere.
Concrete sort of meeds CO2 to set tho, so its not great hermetically sealed

No it doesn't. That's lime mortar. Portland cement sets if sealed or
underwater. There's just the issue of whether the excess water in the
mix could cause a problem.

--
Max Demian