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| Question - |
sir , i had a question ,
after 20 hour ,why the M35 concrete are not set.
{the logshit of RMC is OK.}
the material is used of good quality.
it is because of:-
1)addmixture used to improve the strengh.
2)shuttering oil (Dr. fix it) .
3)excess flyash.
or any other reason.......
plz reply
rahul_dh26@rediffmail.com |
| Author - |
rahul |
Date |
05/20/2008 |
| Post reply |
Back | |
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| 05/29/2008 |
Dear Rahul, This is typical case of retardation which can only be th
ere because of overdosing of admixture. Here your feedback is there t
hat in one column setting took place after 48 hrs and another column
set after 72 hrs which indicates that differential dosage has gone in
to the concrete. There could be two possibilities: a) Admixture is a
dded at site b) If this is the first lot of production there could b
e a possibility that admix drum is not agitated properly and more of
the solids in admixture is added initially. This mix indicated by y
ou is having certain inconsistencies especially w.r.t. w/c ratio. Als
o the flyash used is below 10%, hence this cannot be attributed to fl
yash based mix. The admix dosage indicated is within the acceptable
range.Pl takeup overdosing trial.
Author - Anuj |
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