Conventional physical properties of grouting materials Construction methods
Before grouting construction, mixer, grouting equipment, templates and maintenance items should be prepared.
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 vent holes should be left in the formwork support, and the grouting hole diameter should not be less than the spacing and 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 to mix approximately, then add the remaining water and mix until evenly mixed. The mixing location should be close to the grouting location.
Anchor bolt grouting
⑴ When the anchor bolt hole is made, the wall of the bolt hole is rough, so the hole should be cleaned and there should be no floating ash
Before grouting, oil and other impurities should be soaked in water to remove the accumulation in the hole. inflammation.
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 hole, the
position of the bolt can be adjusted as needed. It is strictly prohibited to vibrate during the grouting process, and do not adjust the bolts again after the grouting is completed.
Secondary grouting of equipment foundation
⑴Before grouting, the equipment floor and concrete foundation surface in contact with grouting materials should be cleaned up
There should be no loose gravel, floating slurry, floating ash, oil, dirt, wax, etc. . The soil surface of the foundation concrete before grouting should be fully moistened and 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 both opposite sides at the same time. After the grouting starts, 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, construction can be carried out in sections depending on the actual engineering conditions
The length of each section should not exceed meters. 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 to push the grouting material along the direction of the grout flow. It is strictly prohibited to push the grouting material from the middle and upper part of the grouting layer.
⑸ After the equipment foundation grouting is completed, it is advisable to cut the grouting material along the edge of the bottom plate toward outsiders after the initial setting.
If the bevel cannot be trimmed, use a spatula to press the surface of the grouting layer after the initial setting.
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