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Posted: Tue May 26, 2015 9:06 pm
by JGR
Hi
I am laying calibrated limestone paving. I am using grit sand mixed 10:1. I have not added too much water to keep it fairly dry. However it seems a little too stiff and hard to tamp down to level. I have read about adding some building sand to the mix to make it softer or should I add simply add more water?

Regards
James

Posted: Tue May 26, 2015 9:23 pm
by sy76uk
10 to 1 is too weak for me and if your using a dry mix then you will need to use a cement slurry on the back of the flag for it to adhere to the bed.

A dry mix will always be hard to tamp down. The trick is to put in just the right amount of bedding before you tamp to the correct level.

Posted: Tue May 26, 2015 10:23 pm
by lutonlagerlout
you are going to have problems there james
mix design is all wrong
needs to be stronger and wetter with a bond bridge or an SBR mix
LLL

Posted: Tue May 26, 2015 10:35 pm
by JGR
Ok, thank you.
What would you recommend say 6:1 with SBR added?