About the water-reducing agent, I have some questions for advice.

[Shamil]

I purchased a batch of naphthalene-based superplasticizers. As a result, the solidification is slow and has many bubbles. Yet, no matter how to adjust, the dosage is the same. What is the reason?

 

[Cassie]

Test the setting time and bulk density, and adjust the formula accordingly. If your original formula has no air-entraining agent and retarder, you can only use it sparingly. It is OK to add some defoamer, but the available defoamer for the naphthalene-based is relatively small; you can buy some Calcium lignosulfonate (to be pure) as a defoamer.

 

[Luis]

Try adding 2-2.5% to see how it works.

 

[Scott Kaplan]

Your naphthalene-based superplasticizers has air-entraining ingredients and retarding ingredients.

 

[Chanliss]

It probably has Sodium ligninsulfonate in it.