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ARW

On 17/05/2020 21:42, wrote:
On Sunday, 17 May 2020 12:57:25 UTC+1, ARW wrote:
On 15/05/2020 23:21, Roger Hayter wrote:
Broadback wrote:

I need to extend a path sideways. I have place edging along side which
in places have left gaps. What is the best product to fill in with? I
think that standard mortar will be too weak, whereas concreted would not
go into the narrow gaps. Suggestions please.

`if the gaps are less than about 20mm I'd just use a stronger mortar mix
- 1:2 or 2:5. And put SBR in if that isn't strong enough.

Wow that is a strong mix:-)

1:2 is actually less strong than 3:1. Portland cement is not particularly strong, so the strongest mix is when it fills the void between packed sand particles.

NT

a 4:1 sloppy mix ends up as hard as bell metal when it cures.

--
Adam