Why are there many bubbles in the appearance of concrete, and how to eliminate concrete bubbles?

The appearance bubbles of concrete are due to the mismatch between the air content of the concrete system and the slurry-bone ratio, and the small bubbles accumulate into large bubbles during the migration to the side surface and upper surface. Some of the large bubbles stay on the side, because the viscosity of the slurry and the barrier of the aggregate frame cannot float smoothly, and they are generally irregular fillet holes after hardening.

The removal of this kind of hole is first based on the adjustment of the gas content to the plasma bone ratio, and secondly, the viscosity of the slurry is reduced, so that the small bubbles can float as much as possible during the accumulation process. Or under the impetus of mechanical vibration, it moves to the inside of the concrete and breaks it up, and then floats up to exclude it.

There are many reasons why concrete produces bubbles, which can be roughly divided into the following reasons:

1. The unreasonable proportion of concrete and the large foam of concrete viscosity caused by more cementitious materials are not easy to discharge, which can be solved by adding fly ash or mineral powder or increasing water consumption.

2. The problem of cement itself, the cement is added with grinding aids, and some grinding aids have a lot of bubbles. 3.Vibration problem, the vibration force is not enough, and the bubbles are not easy to discharge.

The appearance of concrete bubbles is mostly because of 1Short vibrating time, 2The insertion spacing of the concrete vibrating rod is too large, and some parts are not vibrated in place.

Eliminate bubbles1Ensure that the vibration time meets the requirements. 2.The spacing of the vibrators should not be greater than a multiple of the radius of action. The insertion point is uniform.

The reason for the bubbles in the appearance of concrete is that there is a problem with the admixture, and the release agent of the formwork is not brushed well, and the vibration is not in place.

Appearance bubbles.

It is a common quality problem in concrete engineering: honeycomb.

Reasons:1The concrete is too thick at one time.

2.The vibration is not dense or exposed.

3.There are gaps in the formwork that make the cement slurry run.

4.The steel bars are dense and the concrete slump is too small or the stones are too large.

Measures:1Maintain the right slump.

2.The fabric is gentle.

3.The seams of the formwork are squeezed tightly with double-sided adhesive strips.

4.Vibrating operators have a sense of responsibility and quality awareness, and standardize operations.

The reason for the large number of bubbles in the appearance of concrete is that the vibration is not dense when pouring concrete, or the rough surface of the formwork is too many times, and it is necessary to vibrate evenly and compactly to eliminate this situation, replace the new formwork, and improve the appearance quality of concrete!

When there are many bubbles in the appearance of concrete structure, it should be solved from several aspects, first, strengthen the cleaning of the formwork. Second, replace the release agent, and third, strengthen the vibration, so that the vibration does not leak but does not vibrate. Fourth, re-check whether the quality and mix ratio of each raw material of concrete, and workability meet the construction requirements.

After the above reasons are investigated one by one, it will effectively solve the problem of many bubbles in the appearance of concrete.

No vibrating good! It's good that the vibrating bubbles are gone.

Concrete itself is a porous structure. But the pores are on the surface. It is formed that the impact is a defect in appearance.

This is commonly known as honeycomb surface. Some of his formations are bubbles and some are blisters. The holes formed by the blisters are oval-shaped.

Bubbles are mostly formed in irregular shapes. The concrete should be vibrated during the pouring process. Local liquefaction is caused by water analysis and gas floating.

Arrived at the gathering area. or the density of moisture and bubbles in the upper part. Defects are caused by the precipitation of moisture and air bubbles during the solidification of concrete.

The solution is: add and subtract agents. Reduce water consumption while ensuring slump requirements.

The second is when vibrating. Workers with steel bars. Assist on the grinding plate side next to the vibrator.

Tinker with it. Especially in the upper part or in congregated areas. Just do what you say.

Concrete with no surface defects can be achieved.

Answer: The bubbles produced by the concrete are that there is a certain amount of air in the concrete when it is poured, and it is discharged and floated on the concrete surface when it is pulled out along the vibrating rod after vibration, so there are usually a lot of bubbles after the concrete is poured.

Summary. Hello dear.

Appearance bubbles. It is a common quality problem in concrete engineering: honeycomb. Reason:

1.The concrete is too thick at one time. 2.The vibration is not dense or exposed.

3.There are gaps in the formwork that make the cement slurry run.

4.The steel bars are dense and the concrete slump is too small or the stones are too large.

Why are there many bubbles in the appearance of concrete, and how to eliminate concrete bubbles?

Hello pro-look bubbles. It is a common quality problem of concrete engineering: honeycomb.

Reasons:1The concrete is too thick at one time.

2.Vibration accompanied by slow pounding is not dense or exposed vibration. 3.

There are gaps in the formwork that make the cement slurry run. 4.The steel bar is dense and the concrete slump is too small or the stone leakage rock is large.

Hello pro-look bubbles. It is a common quality problem of concrete engineering to return to chaos: honeycomb.

Reasons:1The concrete is too thick at one time to cut 2

The vibration is not dense or exposed. 3.There are gaps in the formwork that make the cement slurry run.

4.The steel bar is dense and the concrete slump is too small, the rock leakage is small, or the stone is too large.

Hello pro solution:1Maintain a proper slump shed to control the town. 2.The fabric is gentle. 3.The seams of the formwork are squeezed tightly with double-sided adhesive strips. 4.Vibrating operators have a sense of responsibility and quality awareness, and standardize the operation chain.

Bubble treatment on concrete surface.

Okay dear, wait a minute.

1.When mixing concrete, an admixture can be added to it to make the concrete evenly distributed, so that the number of Huiwu will not produce a small bubble before gas. 2.

It can also be vibrate, so that the surface bubbles also play a decisive role, pay attention to an orange stop vibration as much as possible, you can extend the time of vibration, and carry out a layered vibration.

Repair for the small bubbles formed on the surface of the concrete, the manuscript brigade can be re-made concrete, if not, you can only use concrete materials to do a layer of repair work on the bubbles formed by the keystool, when painting, layer by layer, slowly paint over and over again, until the small bubbles on the surface can not be seen.

Summary. First, the reason why concrete has bubbles.

First of all, you need to find out why the bubbles are generated, and then you can find the corresponding solution.

1. When mixing concrete, if the water-cement ratio is out of balance, it will also lead to the problem of bubbles, and small holes will be formed on its surface.

2. There is also a very direct relationship with the material, such as the selection of coarse aggregates, some large and small, not uniform, there will be too many particles inside, air will be formed on the surface, and bubbles will naturally be generated.

3. When proportioning, cement and water should also be balanced, if it does not meet the proportion, bubbles will be generated, and the strength is taken into account when configuring concrete, so we must strictly abide by the cement materials. Cement can be added appropriately on the premise that strength is achieved, but the reduction of water can also lead to the formation of blisters.

4. Another aspect is that the air is mixed in the process of stirring, and in the stirr, the air bubble cannot be overflowed, nor can the bubble be extruded by weight, so it is necessary to vibrate when stirring, choose different vibrators, the time should be slightly longer, and the force should be relatively large, so that the concrete surface will be more compact.

Why are there many bubbles in the appearance of concrete, and how to eliminate concrete bubbles?

First, the reason why there are bubbles in concrete first needs to find out why bubbles are generated, and then we can find the corresponding solution. 1. When mixing concrete, if the water-cement ratio is out of balance, it will also lead to the problem of bubbles, and small holes will be formed on the surface of the rock. 2. There is also a very direct relationship with the material, such as the selection of coarse aggregates, some large and small, not uniform, there will be too many particles in it, the surface will form air, and bubbles will naturally be generated.

3. When proportioning, cement and water should also be balanced, if it does not meet the proportion, bubbles will be generated, and the strength is taken into account when configuring concrete, so we must strictly abide by the cement materials. Cement can be added appropriately on the premise that strength is achieved, but the reduction of water can also lead to the formation of blisters. 4. Another aspect is that the air is mixed in the process of stirring, and in the stirr, the air bubble cannot be overflowed, nor can the bubble be extruded by weight, so it is necessary to vibrate when stirring, choose different vibrators, the time should be slightly longer, and the force should be relatively large, so that the concrete surface will be more compact.

Second, how to solve the problem of concrete bubbles 1, when mixing mixed rock forest concrete, admixtures can be added, mixing can make the distribution of concrete more uniform, and at the same time will not know where to produce tiny bubbles, and with the doping of admixtures, the bubbles and the amount of coarse land will follow. 2. In addition, it is necessary to vibrate, which will play a decisive role in the production of bubbles on the surface of the concrete, the better the vibration, the denser the internal structure of the concrete will be, so the time of vibration can be extended, and at the same time, it can also be vibrated in layers.