Calcium Nitrate (Ammonia Free)

Calcium nitrate is a hygroscopic compound, which means it absorbs water from the atmosphere. It is highly soluble in water and alcohol, and the resulting solution is neutral in pH. Calcium nitrate has a molecular weight of 164.09 g/mol, and its melting point is 561 °C.

It is widely used in the construction industry due to its ability to accelerate the setting time of concrete. The compound acts as a catalyst for the hydration process of cement, which results in faster hardening and increased strength.

Calcium Nitrate Application in Construction

Accelerating Concrete Setting

Calcium nitrate is added to concrete to accelerate the setting process, reducing the time required for construction projects. When added to fresh concrete, calcium nitrate reacts with the calcium hydroxide released during the hydration process, forming calcium nitrite. This compound then reacts with the unreacted cement particles, accelerating the formation of the calcium silicate hydrate (C-S-H) gel that gives concrete its strength.

Reduce Corrosion

Calcium nitrate can also be used as a corrosion inhibitor in concrete. When reinforced concrete is exposed to water and air, it can lead to the formation of rust on the metal reinforcement. This can weaken the structure and lead to failure over time. By adding calcium nitrate to the concrete mix, it reduces the rate of corrosion, extending the lifespan of the structure.

Cold Weather Concrete Placement

Calcium nitrate is also used in cold weather conditions when concrete setting is slower due to low temperatures. The addition of calcium nitrate allows the concrete to set at lower temperatures, making it possible to pour concrete in cold weather conditions.

Bisley supplies both calcium nitrate tetrahydrate and calcium nitrate 50%.