On 26/06/2017 15:58, Michael Chare wrote:
When mixing mortar or concrete is there any reason not to use more
cement than necessary? If I use a standard mix I will end up with
surplus cement which won't keep. If I use more cement, I might be able
to avoid buying one bag of sand. Not a major saving, but there is also
the problem of getting rid of the surplus cement.


I would not use over rich mix .... these mixes have been tested and
confirmed over years ........ too much cement will end up with brittle
concrete.

With mortar it is also designed to force a crack on mortar line in the
event of stress not the brick or block.