First of all, the amount of water added to the castable should be strictly controlled in accordance with the instructions, and the limit should not be exceeded, and under the premise of ensuring construction performance, less water should be added rather than more.
The second is that the mixing time of the castable is not less than 5 minutes, and a strong standard mixer should be used. When mixing, it should be dry mixed first, and then according to its dryness and wetness, add 80% of the water to stir, and then according to its dryness and wetness, add the consistency of the water .
Third, the castable poured into the mold frame should be vibrated in layers with vibrating rods immediately. The height of each layer should be no more than 300mm, and the vibration spacing should be 250mm. When vibrating, try to avoid touching the anchors and not damage the heat insulation. The vibrating rod should not be vibrated and re-vibrated on the same part for a long time. After seeing the slurry on the surface of the castable, the vibrating rod should be slowly pulled out to avoid segregation and voids in the castable layer.
