A fairly standard mortar mix would be

one part Portland / one part lime / 5 parts sand

or

one part masonry cement / 5 parts sand

masonry cement is a blend of Portland and lime.

(top posted for your convenience)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Keep the whole world singing . . . .
DanG (remove the sevens)




"hanson" wrote in message
oups.com...
There are holes in the foundation to the outside through which I
can
put my fist, or my flat hand!

What proporation of portland cement, sand, and lime(?) should I
use???
Or should I just buy some pre-mixed material from a big box
store.
Thanks for your thoughts, as I have not idea what to buy!