How to Cure Refractory Cement (2 Stage Methods)

Not only refractory but every type of cement needs to be cured properly after using. Properly curing can provide a better outcome such as preventing cracks, achieving proper strength, and so on.

As you know that refractory cement is different than regular cement and for that reason, the curing process of refractory cement is different as well. You will need to complete two phases to properly cure the refractory cement. First, you will need to cure the cement by following the general curing rule and then you will need to fire curing the cement.

In today’s article, we have provided a proper guideline that will help you to cure refractory cement properly. So, be with us till the end and properly cure refractory cement.

Guide to Procedure for Curing Refractory Cement

As we have stated before that the curing process of refractory cement is different from normal or regular cement. The curing process of refractory cement is done in two stages. In the first stage, you will need to follow the traditional curing rule and in the second stage, you will need to use fire for curing the cement.

Here is the curing procedure.

• After applying cement or pouring it into the mold, you will need to allow the cement to cure for at least 24 hours. More than 24 hours is recommended as it helps the cement to set properly.
• While curing, the temperature shouldn’t go below 70 degrees Fahrenheit or 20 degrees. If the temperature goes below than this then there will be consequences like lower permeability and strength which is bad for the structure.
• Then you will need to use a wet cloth or burlap to cover the cement-applied portion to keep it wet and cure properly. Also, you can use plastic sheets over the surface. It will also help to cure properly and prevent forming cracks on the surface.

By now, the first stage of curing is done and now you will need to use fire to complete the heat curing process. This process is known as calcining.

• In this stage, you will need to heat the refractory cement. By doing so, if there are any air packets or moisture left, they will be driven off.
• In the initial phase, the temperature should be 200 degrees Fahrenheit. With time, you will need to increase the temperature gradually until you meet the desired temperature.

After this, the curing cycle will be completed properly!

Things You Should Be Aware of Before and During Curing

There are some important things that you will need to maintain properly for getting better curing. Here are things that you will need to follow carefully.

• After pouring the cement, you will need to do tapping the mixture. By using the vibrator, you can do so. By this, the air pockets or air bubbles will be removed and you will get a better curing result.
• If you are residing at a dry place then using wet cloth or burlap is mandatory.
• Do not apply any secondary coating before fire curing. Because of doing so, there the surface may cause steam explosions. 
• Don’t raise the temperature during the heat curing process because it can result in poor densification.

Frequently Asked Questions and Answers – FAQs

How long does it take for refractory cement to cure?

There is no fixed time mentioned for curing refractory cement. Basically, the time depends on the type of refractory cement. It can be fully cured in 3 days or it may need a week. 

What temperature does refractory cement cure at?

There are no fixed temperature limits for curing refractory cement. It will depend on the types of refractory cement. Some can be cured at 1560F and others may need 1830F.

Does refractory cement get hard?

Yes, refractory cement gets hard. When the cement is exposed to intense heat, it starts getting hard.

How long does it take for Rutland refractory cement to dry?

The Rutland refractory cement doesn’t have any fixed dry time. For air curing, it requires 24 hours or more. And for heat curing, it requires 3 to 5 days.

Conclusion

Lastly, not only refractory cement but also other cement needs to be cured properly. Otherwise, you won’t be able to achieve the required strength and you will get cracks on your structure as well. So, keep patience, follow the guideline, and properly cure it to get a better outcome.