What are the negative consequences of unvibrated concrete?

Unvibrated will lead to a lot of honeycomb concrete, and not dense.

Mechanical vibration of concrete should be in accordance with the following provisions

1, the use of insertion type vibrator vibration of concrete, insertion type vibrator moving spacing should not be greater than the vibrator radius of 1.4 times, and inserted into the lower layer of concrete in the depth of 50mm?100mm, and the side of the mold should be to maintain a distance of 50mm ~ 100mm.

When the vibration is completed to change the horizontal position of the vibrator in the concrete mix, vibration should be raised vertically and slowly vibrator, vibrator shall not be placed in the mix flat drag. Do not use the vibrator to drive the concrete.

2. The surface vibrator shall be moved in such a way as to cover the edge of the vibrated part.

3, attached vibrator set spacing and vibration energy should be determined by test, and should be closely connected with the formwork.

4, there is a freezing requirement of air-entraining concrete, should not use high-frequency vibrator vibration.

5, should avoid collision template, reinforcing steel and other buried parts.

6, each vibration point of the vibration duration to the extent that the concrete is no longer sinking, the surface of the floating slurry to prevent over-vibration, leakage vibration.

7, for the box girder web and bottom plate and top plate at the connection of the support, prestressing tendon anchorage area and construction joints and other steel intensive parts, it is appropriate to pay special attention to vibration.

8, when the vibrating table vibration, should be designed in advance process.