Guangzhou Da Shuai Building Material Technology Co

Mixing machines, grouting equipment, templates and maintenance items should be prepared before grouting construction. During secondary grouting, the horizontal distance between the formwork and the equipment base should be controlled so that the top elevation of the left and right formwork should not be lower than the upper surface of the equipment base.
When the concrete structure is renovated and reinforced, sufficient grouting holes and exhaust holes should be left in the formwork support. The grouting hole diameter should not be smaller than the grouting hole and the spacing should not exceed the spacing.
When mixing cement-based grouting materials, water should be added according to the amount of water required by the product. Mechanical mixing should be used. When mixing, it is advisable to first add / of water and mix for about 1/2, then add the remaining amount of water and mix until uniform. The mixing time should not be shorter than . The mixing site should be close to the grouting site, and the continuity of grouting should be ensured. The amount of mixing each time should be determined according to the amount of use to ensure that the material is used up within the time limit. Do not add water to the unused portion for mixing.
Anchor bolt grouting
⑴ When forming holes for anchor bolts, the walls of the bolt holes should be clean. There should be no floating ash, oil and other impurities. Soak in water before grouting to clean the holes. Endocytitis.
⑵ Oil and rust on the surface of the anchor bolts should be removed before grouting.
⑶ When pouring the mixed cement-based grouting material into the bolt holes, the position of the bolts can be adjusted as needed. Vibration is strictly prohibited during the grouting process, but tamping can be done appropriately. Bolts must not be adjusted again after grouting.
Secondary grouting of equipment foundation
⑴ Before grouting, the equipment base plate and concrete foundation surface in contact with grouting materials should be cleaned, and there should be no loose gravel, floating slurry, floating ash, oil stains, or wax. wait. Before grouting, the surface of the foundation concrete should be fully moistened, and any accumulated water should be removed before grouting.
⑵ When grouting for the second time, grouting should be carried out from one side until it overflows from the other side. Grouting should not be carried out from opposite sides at the same time. After grouting begins, it must be carried out continuously and the grouting time should be shortened as much as possible.
⑶ When the track foundation or grouting distance is long, the construction can be carried out in sections depending on the actual engineering conditions, and the length of each section should not exceed one meter. If the equipment floor has a complex structure, pressure grouting should be used.
⑷ Vibration is strictly prohibited during the grouting process. If necessary, a grouting booster can be used. The booster pushes the grouting material along the base of the grout flow direction. It is strictly prohibited to push from the middle and upper part of the grouting layer.
⑸ After the equipment foundation grouting is completed, it is advisable to cut a bevel along the edge of the base plate to outsiders after the initial setting of the grouting material. If it is impossible to trim the edge, the surface of the grouting layer should be calendered with a spatula after the initial setting. .
Concrete structure modification and reinforcement grouting
⑴ The concrete surface in contact with the cement-based grouting material should be fully roughened.
⑵ To repair concrete structural defects, the loose concrete should be removed and the steel bars should be exposed, and the edges of the repair area should be cut into vertical shapes.
⑶ Before grouting, all gravel, dust or other debris should be removed, and the surface of the base concrete should be moistened.
⑷Pour the evenly mixed grouting material into the formwork and tap the formwork appropriately.
⑸ When the thickness of the grouting layer is greater than 1, relevant measures should be taken to prevent temperature cracks from occurring.