Various methods of opening holes in concrete walls and the causes of holes
The reason seems to be honeycomb concrete 1. Incorrect or inaccurate measurement of concrete mixture will appear in the measurement, resulting in less mortar and stone in many cases;
2. When the concrete mixture is mixed, the rape is slippery, the mixing time is short, it is not mixed, the workability is poor, and the vibration is not dense;
3. When the cutting height is too high, it will lead to the segregation of concrete;
4. There is no layered material, the vibration is not real, and there is enough time for the various opening methods of the concrete wall to leak or vibrate;
The template did not plug the gap tightly, resulting in the loss of cement slurry;
6. The density of steel and the particle size of stone are almost the same.
How to resist the appearance of aerated concrete 1 Strict control, strict measurement and regular inspection;
2. Fully mix the concrete until it is uniform to meet the requirements;
3. Pipes or conduits with a height of more than 2 meters shall be cut off with a thin rope, and the roots of vertical members shall be reserved by pouring concrete with pebble mortar (generally 30-50㎜).
4. When the casting is cut in layers, it shall be tamped and vibrated in layers to prevent leakage;
5. Close the gap and fill the template, pour the slurry at any time, and check whether the slurry leakage is correct.
Solution: 1 Small battery, 1 after:? 2? 1? 2.5 or clean up after soft compaction of cement mortar;
2. If the cells are relatively large, the loose particles can be chiseled off by various methods of opening holes in the concrete wall, then he will wash the template and carefully tamp and package the high-strength fine aggregate concrete;
3. The chamber can be embedded with deep injection pipe and exhaust pipe, and the surface of cement mortar can be cleaned or concrete pouring can be closed after the injection process.
hole
That is to say, the gap of larger concrete, honeycomb or part of concrete is not particularly large.
The reason seems to be a specific vulnerability 1. In the reserved embedded dense reinforcement parts or holes, the concrete is blocked, so do not continue to vibrate upwards;
Serious segregation of concrete, accumulation of stones, serious slurry leakage, and various methods of opening holes in concrete walls are not carefully vibrated;
3. If the material is too thick, the vibrator will not vibrate to form holes;
Concrete falls on tools, wood blocks, mud blocks and other sundries, blocking concrete, etc.
Solution: 1 Use high-strength fine stone concrete in densely packed steel bars, carefully layered or manually inserted;
2. Both sides of the material must have holes at the same time, so be careful of vibration;
3. Remove residues falling in concrete in time;
4. Treatment method: loosen the loose concrete around the hole, wash the hole on the concrete wall with high-pressure water in various ways, and carefully pour it with high-strength concrete-grade stone after formwork erection.
The above is some information about various methods and reasons for opening holes in concrete walls, hoping to help everyone.
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