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Posted: Fri Feb 14, 2014 8:32 pm
by 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
Posted: Sat Feb 15, 2014 12:11 am
by 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
Posted: Sat Feb 15, 2014 12:43 pm
by 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
Posted: Sat Feb 15, 2014 1:20 pm
by 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
Posted: Sat Feb 15, 2014 3:23 pm
by ringi
How big is a “mix�?
Posted: Sat Feb 15, 2014 5:09 pm
by lutonlagerlout
about so------------ big
:;):
10 sand 2 cement 5-8 litres water approx
LLL
Edited By lutonlagerlout on 1392484185
Posted: Sat Feb 15, 2014 6:49 pm
by lemoncurd1702
But that's a summer mix. At the moment you probably won't need to add any water at all.
