Calcium Nitrate (Ammonia Free)

Construction Use

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%

Agricultural Use

Calcium nitrate is a popular fertiliser that is widely used in agriculture due to its high solubility and ability to provide plants with both calcium and nitrogen. However, traditional calcium nitrate products contain ammonia, which can have negative environmental impacts and can be harmful to some crops. Fortunately, there are now ammonia-free options available, such as calcium nitrate ammonia-free fertilisers, which offer all the benefits of traditional calcium nitrate without the drawbacks of ammonia.

One of the main advantages of using an ammonia-free calcium nitrate fertiliser is that it is safer and more environmentally friendly. Ammonia is a potent greenhouse gas that contributes to climate change, and its production and use can have negative impacts on air and water quality. By using an ammonia-free fertiliser, growers can help to reduce their environmental footprint and promote sustainable agriculture practices.

Another benefit of ammonia-free calcium nitrate fertilisers is that they can be used on a wider range of crops, including those that are sensitive to ammonia. Some crops, such as tomatoes and peppers, can be damaged by ammonia, so using an ammonia-free fertiliser can help to ensure that these crops remain healthy and productive. Additionally, ammonia-free fertilisers are less likely to cause leaf burn or other damage to plants, which can result in higher yields and better quality crops.

Ammonia-free calcium nitrate fertilisers are also easier to handle and store than traditional calcium nitrate products. Ammonia is a toxic gas that requires special handling and storage procedures, which can be time-consuming and expensive. By using an ammonia-free product, growers can avoid the need for specialised equipment and can store the fertiliser more easily and safely.

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