Already done a 4:1 scratch coat with SBR + Feb added and mesh bedded in. The top coat they want colour matched to the pointing mortor which is 5:1:1. Bit apprehensive as i've not used this mix before, always use feb plasticiser. Is there anything to watch out for when adding lime (hydrated) to S&C mixes guys?? shrinkage cracks etc and any tips on preperation to avoid this happening. thankyou:RpS_thumbup:
Sand cement with lime
- Thread starter jack88
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Rigsby
TPF Special Forces
It's important that you don't put too much lime in or it will crack with expansion. As a guide 1 volume of lime to 6 sand 1 cement. So a 4 sand 1 cement would want 2/3 of 1 lime etc.
Don't forget that most cement dyes have a platiciser included so reduce the Febmix accordingly.
Don't forget that most cement dyes have a platiciser included so reduce the Febmix accordingly.
its not gone well at all, never used hydrated lime in my mixes before and it was covered in cracks the next day..managed to close them up ok...customer was happy..but i was'nt...i've used dedicated non hydraulic lime systems and hydraulic lime systems with no problems...with s&c mixes, i'll be sticking with S&C with added feb in future, never failed me as yet..thanks for the advice all the same!!
s.p.t plastering
Active Member
Yeah don't get it in your eye like i did one time
FreeD
Private Member
Yea something hypnotic and relaxing about looking into the mixer until you get a splash in the eye!
superspread
Well-Known Member
lime or feb but not both and dont use mastercrete got a plasticser built in
essexandy
The Lake Governor
I always use some feb as well as lime.
essexandy
The Lake Governor
Nowt wrong with a bit of Fairy
theclemo
Private Member
do u put feb and fairy r just the one
essexandy
The Lake Governor
I haven't used fairy for many years now but it never did any harm unless used to excess, just like using Feb to excess ruins your muck.
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