How to build castable

1. inspection: check the packaging and factory date of the castable, and the general shelf life is 6 months to avoid moisture regain.

2. The amount of water added to the castable shall be strictly controlled according to the instructions, and shall not exceed the standard. On the premise of ensuring construction fluidity, the amount of water added should be less than more. Pay attention to the use of clean water to avoid other components or sundries in the water from affecting the curing.

3. The mixing time of castable shall be no less than 5 minutes. Manual mixing is strictly prohibited. When mixing, dry mixing shall be carried out in advance. After dry mixing is uniform, add 80% water for stirring, and then slowly add the remaining water to continue stirring according to the degree of dryness and wetness until a suitable working consistency is obtained. When mixing castables of different quality, the mixer should be cleaned first.

4. The castable must be used for the whole barrel and bag. Generally, the castable after stirring is used up within 30 minutes, and this time should be shortened appropriately in the high-temperature and dry working environment. The castable with Rong Sheng refractories stuck at the initial setting shall not be poured into the mold frame, and it is forbidden to add water and stir for the second time.

5. The castable after mould inversion shall be vibrated by layers with vibrating rods immediately, and the height of each layer is ~

6. When pouring in a large area, it is necessary to construct in blocks, and the area of each pouring area is1.5 ~ 2.0m. Expansion joints are set with plywood every 2.0m, and no omission is allowed. Expansion joints should be set at intervals of anchor rods.

7. After the surface of the castable is dried, the part exposed to the air should be covered tightly with plastic film immediately. After the initial setting arrives, it should be watered regularly to keep its surface moist. The curing time is 2 days in Rong Sheng and 2 days in Rong Sheng. After the Rong Sheng castable is solidified (generally 6 ~ 8h), the detachable side formwork can continue to be watered and maintained, but the bearing formwork can only be removed after its strength reaches 70% (generally 48h).

8. After the formwork is dismantled, the casting body shall be inspected in time. If quality problems such as honeycomb, peeling and cavity are found, they should be handled and repaired in time. When the problem is serious, the defective part should be chiseled to expose the anchor, and then the same quality castable should be used to fill it tightly and continue the maintenance. It is forbidden to use water putty slurry instead.

It should be noted that more water should not be added to the castable for the sake of construction speed. Although this will make the castable more fluid, it will lead to poor mold strength and lining deformation. If you don't know how to use the castable, you can read the instructions for using the castable.