Thank you for this very interesting information. However... You said that after inserting plasticizer (or super plasticizer) you have to repeat the collapse test. But, in this case, the concrete will sag even faster and more lower due to the effect of the plasticizer. How does this happen then? 🤔
What it allows is the contractor to use a higher slump with less water. If the architect specifies a 4 slump, but the contractor needs/wants a 5 slump (for pumping perhaps). A 5 slump may be accepted by the architect if superplasticisor is used. There are drawbacks of course. Mainly cost, and superplasticor may affect corrosion of rebar or wire reinforcement.
![Building a Rack Back Lead [For Students]](http://i.ytimg.com/vi/CwQ23SAarls/mqdefault.jpg)
![Building a Rack Back Lead [For Students]](/img/tr.png)
Thank you for the informative videos!
Thanks for the comment!
THANK YOU , very helpful. Thank you again
Thanks for the comment!
Nice Mr.B!
Thank you for this very interesting information.
However...
You said that after inserting plasticizer (or super plasticizer) you have to repeat the collapse test. But, in this case, the concrete will sag even faster and more lower due to the effect of the plasticizer. How does this happen then? 🤔
What it allows is the contractor to use a higher slump with less water. If the architect specifies a 4 slump, but the contractor needs/wants a 5 slump (for pumping perhaps). A 5 slump may be accepted by the architect if superplasticisor is used. There are drawbacks of course. Mainly cost, and superplasticor may affect corrosion of rebar or wire reinforcement.