yes sure, you can use sucrose or naphthalene based superplasticizer.

Hello Januarti Jaya Ekaputri, I used naphthalene based superplasticizer but it doesn't work with my mix and there is no any improvement for the work ability or setting time. 

sometimes it occurs, because of chemical composition of binders you use. If you have high calcium oxide in it, rapid setting time will happen.

Januarti Jaya Ekaputri, Thanks for your interesting

Actually am using low calcium fly Ash, but the binder including Slag as source of calcium.

efficiency of a set retarding admixtures in a geopolymer mixture depends both on the binder type and the alkali activator. 

Generally speaking, based on my experience, I suggest to try the following chemical substances:

- sodium gluconate

- sodium tartrate

- tartaric acid

in combination with both

napthalene and acrylic based super plasticizers.

regards 

luigi coppola

You should try lignosulfonate salt (calcium or sodium).

Cheap retarder used for oil well cementing operation for low temperature range.

Best regards,

André Garnier

sucrose or simple organic acid as maleic , but if you used K silicate as activator you donot need any superplasticizer

I read about using H3PO4 and K2HPO4 as a effective retardars. If you interested send me pm to show you related papers.

Our experience shows that the following SPs do not satisfactorily and they adversely affect the strength:

SNFC

SMFC

CAE based SPs