Treatment of serious quality defects in concrete

Large-area leakage reinforcement can be treated with increasing the cross-section of the original component, that is, pouring a layer of 50 100mm concrete layer with fine stone concrete live shotcrete on the surface of the leakage reinforcement, and adding a reinforcement mesh to prevent the cracks of the new part should be added, and the reliable connection with the original structure is ensured at the same time.

Serious quality defects, unified standards and 50204 have detailed provisions, 1, the quality defects that affect the safety of the structure must be found to design a treatment plan, according to the plan after the completion of the treatment, the director of the supervision company to organize the construction unit, the design unit personnel to organize special acceptance, the formation of acceptance documents. 2. For quality defects that do not affect the safety of the structure, the construction unit shall issue a treatment plan in conjunction with the supervision unit, and organize a special acceptance and issue an acceptance plan after the treatment is completed. before proceeding with the next step of project construction.

The treatment is to make up the concrete of the same grade, and the surrounding chisel is to ensure the combination.

The key is to do a good job of communication with the supervision opinion and supervision agency.

If the area is too large, the concrete can be chiseled, re-tied and rebuilt.

It is mainly necessary to do a good job of communication and coordination, deal with the surrounding concrete chiseling, and pour concrete for the vertical mold.

I think this should be dealt with because of the matter, serious to report to the project department first, the project department to report to the supervision unit, the supervision unit and the project department to conduct on-site investigation, convene a special processing meeting, formulate a treatment plan, record processing.

Agree upstairs, the treatment plan must be approved by the three parties.

You haven't said you're a construction, supervisor, owner? Or is it a purely technical issue.

Kiss! Hello, happy to answer your <>

Common concrete quality defects are: 1. Matte surface.

2. Expose tendons. 3. Honeycomb. 4. Holes.

5. Cracks. 6. The strength of concrete is insufficient. Ordinary concrete, generally refers to cement as the main cementitious material, with water, sand, stone, if necessary, mixed with chemical admixtures and mineral admixtures, according to the appropriate proportion, after uniform mixing, dense molding and curing hardening of artificial stone.

Concrete is mainly divided into two stages and states: the plastic state before setting and hardening, that is, fresh concrete or concrete mixture; The hard state after hardening, that is, hardening into concrete or concrete. The concrete strength grade is divided by the standard value of cubic compressive strength, and the current strength grade of ordinary concrete in China is divided into 14 grades

and C80. Hope mine can help you <>

Do you have any other questions?

There are three parts to the quality defects of concrete:

1. Performance indicators such as strength grade, elastic modulus, and impermeability grade do not meet the design requirements;

2. Appearance quality defects, including exposed ribs, honeycombs, holes, slag inclusions, looseness, cracks, connection defects, shape defects, appearance defects, etc. (For details, see Article 1 of the Code for Acceptance of Construction Quality of Concrete Structure Engineering);

3. The deviation of the structure size exceeds the allowable deviation.

Concrete mainly has the following defects:

1. Hemp noodles. 2. Expose tendons. 3. Honeycomb. 4. Holes. 5. Cracks. 6. The strength of concrete is insufficient.

Concrete is a particularly common material in the construction now, in the construction process of concrete must be well proportioned, otherwise it is easy to have some problems, then, the following is to introduce the concrete quality defect repair program is.

1. What is the repair plan for concrete quality defects.

If it is a small honeycomb, the concrete surface can be cleaned and compacted with 1:2 or cement mortar; If it is a large honeycomb, it is necessary to remove fragile and loose particles, wash the branch wood, and carefully fill and compact it with high-grade fine stone concrete; If it is a deep honeycomb, bury the grouting pipe and exhaust pipe, coat the surface with mortar, and then inject cement after sealing.

Second, what are the precautions for concrete construction.

1. When pouring, the vibration holding time should make the concrete surface appear slurry, no bubbles, and no settlement. The insertion points of the vibrator form a plum blossom shape and are evenly arranged in order, and the order of the determinant gear is rotated, and the distance of the rotation position should be less than 40 cm to ensure leakage.

2. In the process of pouring beam and slab concrete, first pour the beam concrete, start from the position of the beam and column nodes, ensure that the vibration and compactness of the beam and column node positions, and repeatedly pour forward and the plate together with the slurry method, but no cold joints can occur.

3. After the concrete surface layer is pressed and wiped 3 times, it is immediately covered and cured. After the concrete is all solidified, sprinkle water first and fully soak it, seal and cover it with plastic Hengqing film, and often check the surface of the plastic film, but when there are no water droplets on the film, it should be sprinkled again.

4. The concrete must be poured in the limited time, and the cold joints occur for the concrete pouring of the embankment, and the two pouring times cannot exceed one and a half hours, and the handover position must be continuously stirred with a vibrating rod.

What are the common concrete quality defects? What are the causes? How to prevent and deal with it?

Hello dear<>

Thank you very much for your question. Common concrete quality defects include rubber cracks, porosity, hemp surface, spalling, defects, etc. There are many reasons for the growth of these defects, mainly including unreasonable concrete mix ratio, non-standard construction technology, and substandard material quality.

For example, unreasonable concrete mix ratio will lead to substandard concrete strength, and non-standard construction technology will lead to poor compactness of concrete, resulting in defects such as porosity and hemp surface. In order to prevent and deal with concrete quality defects, a series of measures need to be taken. First of all, construction management should be strengthened to ensure that the construction quality meets the requirements.

Secondly, you should choose a high-quality concrete material and ensure that the material meets the relevant standards. At the same time, the concrete mix ratio should be reasonably controlled to ensure the strength and compactness of the concrete. In addition, attention should also be paid to the construction process, such as pouring method, vibration method, etc., to ensure the uniformity and compactness of the concrete.

Finally, regular maintenance and repairs should also be carried out to ensure the safety and stability of the concrete structure. For example, cracks in concrete should be repaired in time to prevent further cracking of the concrete. In the actual project, corresponding measures should be taken according to the specific situation of the seepage Changshi to ensure that the quality of concrete meets the expected requirements.

I hope my answer can help you, and I wish you a happy life! <>

When many rural areas build their own houses, they often have some quality problems due to insufficient cost and lack of professional knowledge, especially the problem of concrete quality defects is the most frequent. If you want to remedy, you must analyze which kind of quality defects appear, generally there are honeycomb, hemp surface, holes and other situations, if it is honeycomb, you need to press the prepared mortar into the wall, and scrape off the excess part at the same time. If it is in the state of hemp surface, it needs to be cleaned with water in advance, and then the prepared cement is evenly coated.

The phenomenon of honeycomb in concrete, to judge whether it is a large honeycomb or a small honeycomb, if it is only a small honeycomb, it can be operated according to the method just mentioned, and some honeycombs appear more serious, it is necessary to chisel away the loose concrete first, wash it with steel wire, and then pour it with high-strength concrete, and also need to carry out fine maintenance. For the hemp surface parts that need to be treated, spray the surface to saturation with a watering can, and then evenly apply the cement on the wall, and continue to cycle until the problem is all covered by cement ash, and then carry out the corresponding detail repair to ensure that the concrete is flat. <>

If it is a hole phenomenon, it is necessary to chisel out the loose part of the concrete, then clean up the excess debris and dust, blow the wall with compressed air, rinse it with water, observe that the concrete is in a wet state, and finally pour it with high-strength concrete. Only workers with a sense of responsibility can avoid the phenomenon of surface leakage, if there is really no way to avoid, if you want to repair it later, you need to analyze the cause of the phenomenon of exposed ribs, and then carry out scrubbing treatment, and use cement mortar to press the parts of the exposed ribs until they are flattened, and the later maintenance is also very important. <>

To sum up, if there is a quality defect in concrete, we must pay attention to it, which will not only affect the beauty of the house, but also bring some safety hazards if it is serious, so it is best to avoid this situation in the process of decoration, and once it is found, it needs to be remediated.

It is to return all these to the factory for reconstruction. If you can't stand it, you can just scrap it. You can drag him to an uninhabited place and bury him.

Rework can be requested in a timely manner, or continued if such quality defects do not affect the design requirements.

First of all, it is necessary to rework or repair according to the requirements, and then accept it after reaching the acceptance standards.