hi
slump flow is 70cm
but in j-ring test Level differences inside the ring and outside the ring is 3cm
how to improve it
i need 1cm
thx
:D
therefore i answering my question after the test
!!! because i will never stop!!!
you can improve the flow ability by increasing cement(max 50Kg) and using smaller stone powder(Passing through the sieve #50)
with this way you can take down the amount of powder to 140kg
(you should use lime stone powder)
sorry for my bad english
with best regards
Hello Mohammad,
You can improve your result using a correct superplasticizer and using course aggregates of maximum 1cm to permit best flow but at the same time good strength.
Depending on your recipe cost you could use "old" sodium naphtalensulphonate to have best slump, good strength and low cost, or acrylic/polycarboxylate (expensive but New technology product without formaldeid) to obtain best performances and big water reduction demand, so little shrinkage and nothing Sra additive or other expansive materials to adjust drying shrinkage (that could occur if you reduce dimension of course aggregates).
Greetings
Alex
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