Preventing 2 concrete slabs from interacting

[mar2805]

Hello!
If you cast a new RC floor slab over the existing one....would you agree that putting an nylon foil on top of the old slab, before casting a new slab, would prevent two slabs from "sticking" to each other, and thus behaving as completely as two independent bodies?
Thank you

 

[HTURKAK]

For the analysis purpose yes.. but the real behavior may differ depending on the surface texture of the old slab and friction factor of foil. Is this an elevated slab ? what is the reason for separation ? Is the new slab a kind of floating screed?

 

[mar2805]

The reason of separation is that the analysis of the new slab did not take into the account the weight of the old slab....thus the fear of two slabs "sticking"