In industrial production, refractory castables are widely used. However, as the weather becomes colder and the temperature decreases, the low temperature environment in winter brings many problems to construction. But as long as we take scientific and reasonable measures, winter refractories castable construction can also ensure quality and meet the needs of industrial production.
The low temperature in winter will significantly affect the performance and construction effect of refractory castables. First of all, low temperature will cause the material's fluidity to deteriorate, making mixing and pouring more difficult. Secondly, the castables solidify and harden more slowly at low temperatures, which may affect the construction progress. Moreover, if the temperature is not properly controlled during the construction process, cracks can easily occur and reduce the service life and performance of the refractories castables.
In order to meet the challenges of winter construction, we need to start from many aspects.
1 Temperature: The temperature guarantee of the construction environment is the foundation. Construction should be carried out in a closed space as much as possible. If conditions permit, an insulation shed can be built and equipped with heating equipment to keep the construction environment temperature above 5 degrees Celsius.
2 Raw materials: The pretreatment of raw materials is particularly critical. Before construction, the aggregates and powders of refractory castables should be stored in a warm and dry place. During use, the temperature of the raw materials can be increased by heating. At the same time, the water used for mixing should also be heated to a suitable temperature, generally between 20 - 30 degrees Celsius, to improve the fluidity and construction performance of the castables.
3. Mixing process: During the mixing process, the refractory castables mixing time needs to be appropriately extended to ensure that the castables are fully and evenly mixed. Strictly control the amount of water added. Excessive water will weaken the strength and fire resistance of the castable.
4 Maintenance: Maintenance after construction is completed is an important part of ensuring quality. Cover and insulate the poured parts in time to maintain appropriate humidity to prevent cracks caused by rapid evaporation of water and sudden temperature drops.
5. Weather changes: In addition, construction workers should pay close attention to weather changes and avoid construction in severe weather conditions such as rain and snow. At the same time, we will strengthen quality monitoring during the construction process to promptly discover and deal with possible problems.
