When does antifreeze need to be added to concrete? Nanjing antifreeze manufacturer Maanshan early strength antifreeze price

When the daily average temperature of the concrete is below 5 degrees for 5 consecutive days, the concrete will enter winter construction, and antifreeze must be added.

Admixtures that can harden concrete at negative temperatures and achieve expected performance and sufficient anti-freeze strength under specified curing conditions. It is a substance that can prevent moisture in materials from freezing at low temperatures.

Antifreeze concrete is a substance that hardens at negative temperatures, achieves expected performance under specified curing conditions, and prevents moisture in the material from freezing at low temperatures. Ensure the normal construction of concrete under negative temperature and reduce the freezing point in the concrete mixture. It can be combined with water-reducing agent, air-entraining agent, etc. to achieve better antifreeze effect. Used for various concrete projects and during construction in cold seasons.

Antifreeze components can change the liquid phase concentration of concrete, lower the freezing point, ensure that the liquid phase exists in the concrete at negative temperatures, and allow the cement to continue to hydrate. The water-reducing component can reduce the water consumption for concrete mixing, thereby reducing the amount of ice in the concrete, making the ice crystals finer and evenly dispersed, and reducing the damage stress to the concrete.

The air-entraining component introduces a certain amount of tiny closed bubbles to reduce frost heave stress. The early strength component can improve the early strength of concrete and enhance its ability to resist freezing damage. Rust inhibitors such as nitrite can prevent the corrosion of steel bars by chlorine salts to a certain extent, and have both anti-freeze and early strength effects.

When mixing concrete, attention should be paid to appropriately reducing the mixing water. The water reduction rate can be controlled at about 10%, and the slump should be controlled within 30mm. Certain insulation measures must be taken during use, and the temperature of the concrete leaving the tank should not be lower than 7°C.