PCE water reducing agent has its own antifreeze performance

In some cases, PCE water reducing agent has its own antifreeze performance without compounding: the PCE water reducing agent synthesized by partially replacing acrylic acid with itaconic acid (1:1 substitution) can withstand a negative temperature environment of about -5 degrees Celsius. The solution containing PCE 0.2% (dry basis) can not freeze at -5 degrees Celsius. However, it is mainly the dilute solution of admixture with low PCE content and low solid content that starts to freeze at close to 0 degrees Celsius. Adding enough early strength agent and a small amount of antifreeze agent can prevent the water reducer itself in a wide low temperature range. Freeze, and at the same time have the frost damage of antifreeze concrete at about -5 degrees Celsius.

PCE is a high-efficiency air-entraining water-reducing agent

Since PCE is a high-efficiency air-entraining water-reducing agent, it can be mixed with an early-strength agent and an appropriate amount of antifreeze. When necessary, a viscosity-changing agent and a coagulant should be added. The main antifreeze chemical components are sodium nitrite, calcium nitrite, potassium nitrite, sodium nitrate, calcium nitrate, potassium nitrate, sulfate, sodium chloride, calcium chloride, ammonia, urea and methanol, etc.

3 types of component should not be used as an antifreeze for PCE water reducing agents