Jim GM4DHJ ... wrote:

On 31/08/2019 13:17, Robin wrote:
On 31/08/2019 12:23, Andrew wrote:
On 31/08/2019 09:39, Bert Coules wrote:
"Jim GM4DHJ ..." wrote:

And the right amount of washing up liquid ....

Would you add plasticiser (or washing up liquid) to shed-bought
ready-mixed mortar? That's what I used on this latest effort, but
with nothing added.

yes. All you have bought is premixed sand and cement.

not necessarily. Eg the widely available Blue Circle "Quality Assured
Mortar Mix" is a traditional 6:1:1 sand/cement/lime mortar and lime is a
time-served plasticiser.

after a hundred years you can pick out the bricks in a lime mortar wall.....

6:1:1 made with hydraulic lime behaves like cement mortar and is strong
enough for ordinary bricks. It isn't permeable like proper lime mortar.

--

Roger Hayter