How should sbr be correctly mixed to make mortar?

[james-78]

How should SBR be mixed correctly when making a mortar for pointing, going to go 3:1 mix.

Should SBR be added and mixed with water, and once mixed/blended together then put in mixer to make mortar?

I've read SBR increases workability of mortar, so should you add plasticiser or not?


As always

Thanks for your help

[lutonlagerlout]

we stick about 100ml in a mix
glug-glug as mickg succinctly puts it

we did a roof last year and the arch inisted on 3 sharp sand 1 cement and 500ml of sbr in every mix
just need to be careful as it stains easy

I usually dont use SBR in the stong paving pointing mix
cheers LLL

[Tony McC]

500ml per mix seems rather generous, but hey! It's an architect, so more or less guaranteed to be wrong! :;):

The most effective method is to mix the SBr with the gauging water before adding to the mixed dry ingredients. That way, you get a more even and easier dispersal of its gloopy goodness throughout the mix.

SBR for mortars and concretes

[mickg]

>>>glug-glug as mickg succinctly puts it

that's into a bucket of clean water and mixed together before adding to the sand and cement already in the mixer

[ringi]

How big is a “mix�?

[lutonlagerlout]

about so------------ big

:;):

10 sand 2 cement 5-8 litres water approx

LLL



Edited By lutonlagerlout on 1392484185

[lemoncurd1702]

But that's a summer mix. At the moment you probably won't need to add any water at all.