Foundation Question

[martyc]

Guys was laying a small foundation last night but used a lot more mix than i thought...hence i ran out about ~ 1 inch lower than an adjacent foundation that i need to be level with.
Its for a pillar and the foundation is ~2 foot square and about 2 foot thick.
I have 4 rebar pegs sticking out of the foundation all by about an inch(they are level with the adjacent foundation and the plan was to tamp to these).
Given that this foundation is already about 2 foot deep would it be Ok to pour the last inch seperately or should i just build it up with mortar when running the blockwark across the 2 foundations?
Im guessing the 4 bits of rebar will help tie it all together and since its just a flat piece on top of another flat piece it should be fine.
What ye think???
Cheers
Marty.

 

[noseall]

lay a brick-on-edge as the starter course.

 

[martyc]

Hi noseall...brick on edge will be more than an inch...i need the 2 foundations level...theres already blockwork on the other foundation awaiting for me to tie into.
Can i just lay another inch of mix given there is steel already protruding from what i laid last night to tie it together?
Cheers,
MArty.

 

[noseall]

oh go on then!

 

[martyc]

Thanks!!
Cant see it being an issue myself

 

[noseall]

i would be inclined to use concrete sand ( screed sand, sharp sand, grit sand) as this will not separate as readily as a coarse granular layer. i fear ballast will not knit together as well at that thickness.

you will need to mix it like flooring screed, which is fairly dry and compact it into place.

 

[martyc]

Cheers...just regular builders sand and cement so?...like a mortar mix except a bit stronger and drier ~2.5:1 im guessing.
Thanks,
Marty.

 

[noseall]

screed sand is grittier than a softer builders sand so will have greater strength at that thickness. plus, if you lay it dryish you will be able to lay your regular mortar mix straight on top.

 

[martyc]

Nice one...ta for that.
Marty.