In the calculation of the water/cement ratio and of mix proportions in general, the volume of the liquid superplasticizer must be taken into account.
It varies according to the particular additive in use. A typical range would be 0.3% - 1% liquid addition by mass of binder (i.e. for 1m3 concrete with a cement content of 300 kg/m3, between 0.9 and 3 litres of plasticiser would be added) but a trial and error approach is generally required. Most SP manufacturers will supply data sheets suggesting typical addition rates. The effect on the w/c ratio is generally negligible - for the concrete suggested above, adding 3 litres of SP to ~150 litres of mix water will change the w/c by +0.01.
The type and content of SP is depending on the type of concrete, SP are available in different generation e.g. high range water reducers HRWR are normally used in self compacting concrete and also Powder Reactive concrete, in this case we can go even higher content say 2 or 3%
Thank you very much for replying @Phil Purnell. This information of yours is really helpful. Also, thank you very much for your inputs, I greatly appreciate it.
Respected Nasir Shafiq sir,
Thank you very much for replying. Thank you very much for your inputs, I greatly appreciate it.
This may help
https://www.researchgate.net/profile/Imrose_Bin_Muhit/publication/274640763_Dosage_Limit_Determination_of_Superplasticizing_Admixture_and_Effect_Evaluation_on_Properties_of_Concrete/links/552dcd810cf2e089a3ad89fd.pdf
Article Dosage Limit Determination of Superplasticizing Admixture an...
Dear Mick Sedunary sir,
Thank you very much for your inputs, I greatly appreciate it.
Dear
you can reduce the w/c ratio up to 0.25 and add 0.3-0.6% of liquid superplastizer by weight of water. selection of the proper percentage depends mainly on the type of superplastizer ( liquid or powder) and the type of concrete. kindly note that you will get high early strength when using it.
Thank you very much for replying Saad Sarsam. This information of yours is really helpful. Also, thank you very much for your inputs.
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