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# Friction coefficient between soil and polythene covered concrete

## Friction coefficient between soil and polythene covered concrete

(OP)
Hi Good Day everybody
Can anyone give me some guidance about Friction coefficient between soil and polythene covered concrete footing?
thanks

### RE: Friction coefficient between soil and polythene covered concrete

My experience is the value is near zero.

I once had a load of prepared sand on my trailer for ice removal purposes when I lived in the country. Since it was salty sand, I first put a sheet of plastic on trailer. In going home I went up a road at about 10 degrees slope. Then I turned onto a side road at no more than 20 degrees lope, probably 15. Getting home I was much amazed to see the trailer empty. Going back there was a neat pile of sand on the plastic in the middle of the road at the steeper slope. I suggest you do a similar test.

### RE: Friction coefficient between soil and polythene covered concrete

OG, very nice example. I also consider the value to be zero. For example, if we have a plastic moisture barrier sheet underneath the floor slab, I recommended no consider contribution of lateral resistant from the slab friction with the soils.

### RE: Friction coefficient between soil and polythene covered concrete

To which I'll ask, what's the end game? I mean If I was some researcher and claimed to know the answer was 8 degrees, what would you then do with the number?

f-d

ípapß gordo ainÆt no madre flaca!

### RE: Friction coefficient between soil and polythene covered concrete

(OP)
Thnaks every body. the real scenaio was to conclude the fondation recommnedation.

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