Admixture Dosage ??
Admixture Dosage ??
(OP)
Hi there,
We have a different mixes with cement varying from 400 to 480 Kgs/ cum. The W/C is kept constant = 0.35 for all the mixes. The mixes are like this
Cement W/C %Dosage
400 0.35 0.5%
420 0.35 ??
440 0.35 ??
460 0.35 ??
480 0.35 ??
Now, the first mix was trial batched and slump was found acceptable @ 60 mins with a dosage of 0.5% of admixture by v/w of cement.
Can you please let us know for the remaining trials for a given slump wheather the dosage of admixture will increase, decrease or remain the same???
With Regards,
Farhan
We have a different mixes with cement varying from 400 to 480 Kgs/ cum. The W/C is kept constant = 0.35 for all the mixes. The mixes are like this
Cement W/C %Dosage
400 0.35 0.5%
420 0.35 ??
440 0.35 ??
460 0.35 ??
480 0.35 ??
Now, the first mix was trial batched and slump was found acceptable @ 60 mins with a dosage of 0.5% of admixture by v/w of cement.
Can you please let us know for the remaining trials for a given slump wheather the dosage of admixture will increase, decrease or remain the same???
With Regards,
Farhan





RE: Admixture Dosage ??
Check with the admixture manufacturer. They know their products better than anyone (or at least they should!).
RE: Admixture Dosage ??
When I traveled internationally, I routinely grabbed local cement samples for friends. It was a bit of a problem getting the white cements through customs.
They are usually willing to supply recommendations, especially if not put in a adversary position against a competitor.
Dick
Engineer and international traveler interested in construction techniques, problems and proper design.