The curing period of mullite refractory clay is affected by factors such as binder type, construction environment temperature, humidity and drying process. The curing period varies under different formulations and usage scenarios. For details, please refer to the following classification description:
By Binder Type
Phosphate binders usually need to be naturally cured for 3-7 days in an environment with a temperature of 15-30℃ and a humidity of ≤80%. After the mortar has initially hardened, it can be dried. It needs to be dried according to the temperature rise curve, and the total drying cycle is about 24-48 hours, and finally the strength is stable. The normal temperature curing cycle of aluminum sulfate binders is generally 2-5 days. It is necessary to avoid a humid environment to prevent the binder from hydrolyzing and affecting the strength. If accelerated curing is required, it can be dried at ≤100℃ for 12-24 hours after curing at room temperature for 24 hours, and the total cycle is about 3-5 days. The composite binder has a longer curing cycle, and it takes 5-10 days to cure at room temperature. The drying process is heated in stages, and the total drying time is about 36-72 hours. The overall curing cycle can reach 7-14 days to ensure that the binder fully reacts.
Adjust According to The Construction Environment Temperature
In low-temperature environments, the cement setting speed slows down, and the normal temperature curing cycle needs to be extended to 7-10 days, or heating measures need to be taken to maintain the construction temperature above 5°C, and the drying time needs to be increased by 12-24 hours accordingly. In high-temperature environments, the cement water evaporates quickly and is prone to surface cracking. It needs to be covered and moisturized in time after construction. The normal temperature curing cycle can be shortened to 2-3 days, but before drying, it is necessary to ensure that the internal moisture is evenly dissipated to avoid rapid drying.
Maintenance Requirements In Special Scenarios
When the thickness of the adhesive layer exceeds 50mm, the internal drying is slow and the room temperature curing needs to be extended to 7-10 days. The drying is carried out in multiple stages, and the total cycle can reach 10-15 days to prevent internal cracking. In scenarios with anti-corrosion or high-strength requirements, the drying temperature maintenance time needs to be extended, and the total curing cycle can be extended to more than 14 days to ensure that the binder is fully cured and improve the anti-corrosion performance.
A reasonable curing cycle is an important guarantee for the performance of mullite refractory clay, and our products have significant advantages in curing. We use advanced formulas and processes, and the binder ratio is scientific and reasonable. Under different binder types, the curing cycle is more optimized, which can shorten the curing time as much as possible and improve construction efficiency while ensuring performance. At the same time, our products are more adaptable to the construction environment temperature, and can ensure the quality of the mortar through reasonable curing plans in both low and high temperature environments. For special scenarios, we also have targeted maintenance suggestions and product characteristics that can meet various needs such as anti-erosion and high strength.
Choosing our products not only gives you high-quality mullite refractory clay, but also professional maintenance guidance, allowing you to have no worries during construction and use, giving full play to the excellent performance of the products and protecting your high-temperature equipment.