Adding super plasticizer at site
Adding super plasticizer at site
(OP)
Good day everybody,
I have some concern regarding adding super plasticizer at site just before discharge of ready mix concrete. Our footing designed with lot of rebars so we need a flowable concrete for workability. Our mix design includes plasticizer and retarder admixtures but when arrived at site, the concrete slump is a bit lower, so it needs additional SP. Is there adverse effect if applying overdosage of plasticizer? Please any expert on concrete works if I may have your comment on this..Thank you..
I have some concern regarding adding super plasticizer at site just before discharge of ready mix concrete. Our footing designed with lot of rebars so we need a flowable concrete for workability. Our mix design includes plasticizer and retarder admixtures but when arrived at site, the concrete slump is a bit lower, so it needs additional SP. Is there adverse effect if applying overdosage of plasticizer? Please any expert on concrete works if I may have your comment on this..Thank you..





RE: Adding super plasticizer at site
Why do you think they will overdose the Super P? It's not free, so the concrete guys don't throw it around willy nilly. I suspect that you'd really have to overdo it to have an effect on the concrete.
RE: Adding super plasticizer at site
While plasticizers used to be added at the site because of their low effect time, better formulations have allowed plant addition for over 20 years. I do not recommend the addition of plasticizer at the site because of control issues and the inability to properly disperse the plasticizer in the mix.
RE: Adding super plasticizer at site
RE: Adding super plasticizer at site