How to fill holes in screed for wood floor?!

[gemmabuild]

hi - A radiator was removed this morning leaving 2 holes in the screed where copper cap was put over the radiator pipe. The holes left in the screed are about 6cm wide and 3 cm deep.
We are getting engineered oak tongue and groove flooring laid on monday 17th December.

- What can I do to fill the 2 holes in the screed?
- Can I fill with a Wickes bag of ready mix concrete?
- or Can I use expanding foam as easy way out?

Is it safe to pour concrete directly into the hole surrounding the copper cap? or should i stuff some lagging round first then concrete around the lagging?

Untitled

• gemmabuild
• 14 Dec 2012
• 1

Untitled

• gemmabuild
• 14 Dec 2012
• 1

Untitled

• gemmabuild
• 14 Dec 2012
• 1

Thanks guys!!

 

[Aqua]

I'm assuming the pipes have been made off properly and don't leak...?
Just mix a small amount of sand and cement (5-1'ish) and fill the holes flush to the floor.