There are many kinds of concrete retarder formulas, one of which is for reference only

Does the retarder formula have fixed raw materials? Or is it formulated on a case-by-case basis? I don’t know anything about this, so I’d like some advice.

Retarders are mainly weak acids and salts such as tartaric acid, boric acid, phosphates, etc., molasses such as glucose, fructose, etc., and ordinary water-reducing agents such as lignocalcium, Sodium lignosus also has a retarding effect. These materials can be used to prepare retarder. The specific dosage needs to be determined through testing, and the test is conducted based on the required retarding time, operating temperature and other factors.

The retarder formula is not unique. There are concrete super retarder, alkali slag concrete retarder, oil well cement retarder, cement concrete composite super retarder. Retarder, etc. Now we provide you with several retarder formulas detected by microspectroscopy analysis:

Concrete ultra-retarder formula:

Maltodextrin 73%

Citric acid 13%

Sodium pyrophosphate 14%

Oil well cement retarder formula:

20% 88% polycopolymer solution

50% hydroxyethylene diphosphonic acid solution 12%

The multi-component copolymer solution is composed of 2.5% itaconic acid, 4% acrylic acid, 4% potassium persulfate initiator solution, 13.5% 2-acrylamido-2-methylpropanesulfonic acid, A solution of 76% deionized water.

Cement retarder formula:

Phosphogypsum: 55%

Fly ash: 40%

Calcareous material: 4%

Activator: 1%

</p