Are cracks in the floor heating floor normal, and how to prevent cracks in the floor heating floor?

How to deal with cracks in the indoor floor.

Accurately calculate the area of each space in the room before decoration, understand the actual size of the room, and roughly know the amount of materials used, so that you can save money when signing contracts, purchasing building materials, and accepting payments. Measuring the indoor area can be divided into several parts, such as walls, floors, tops, doors, windows, etc. Among them, the area measurement of doors and windows is more convenient, if you only need the construction team to paint the wall or pave wallpaper, whether the area of doors and windows needs to be deducted, you must ask clearly.

When calculating the wall area, the material is different, the calculation method is also different, the usable area of paint and wallpaper is calculated by multiplying the length by the height, and the area is calculated as square meters.

Length: the net length of the main wall; Height: If there is no wall skirt, it will be from the indoor ground to the top surface, and if there is a wall skirt, it will be from the top of the wall skirt to the top surface; If there is a suspended ceiling on the top surface, the height of the ceiling shall be deducted upon request.

When calculating the top area, it is also necessary to ask whether the area of the partition wall and the beams and columns passing through the top surface is deducted.

There are cracks in the floor of the new house.

It is recommended to ask a professional to check on the spot, and if necessary, professional testing is required.

If the city is designed and constructed according to the specifications and delivered to the house or the village has been used for many years, after determining that there is no foundation change (such as landslide, subsidence, ** and other reasons), it can be preliminarily judged to be a crack, damage and other causes, and the cause can be found and dealt with according to the attached table.

According to the phenomenon described, it is basically determined that the surface plastering crack is caused by a large change in temperature, but it is also necessary to pay close attention to the changes in the riverbank that may cause structural damage to the house. In addition, it is normal for the car to be vibrated and there is no need to worry.

Is it normal for a brick-concrete house to have cracks in the ground at the junction between the balcony and the living room?

If it is a commercial house, see if it is within the warranty period, and find a property or developer to repair it. Look at how deep, wide, and long the cracks are. To judge the crack is a structural crack in the concrete (then it should be serious, to be treated.

Or is it caused by the shrinkage of the cement mortar ground (if so, it does not need to be treated), this should be judged whether the foundation settlement is stable. Check if there are any other locations in the house. Put 2-3 cm of water on the balcony (the floor drain is blocked), wait a few hours to see if there is any leakage in the balcony slab, if there is a crack in the floor slab, it needs to be treated.

When the house was closed, there were cracks in the ground, except for the bathroom, there were all the others, and the gods were the structural problems of the house.

Is it paved with floor heating, the layer of cement cracks on the pipe is fine, if it is not the main body cracks, it is no problem.

What should I do if there is a crack in the floor and leaks, the leakage is very bad.

If you can apply from above, open the top to the structural plate first, and then apply the waterproofing. If there is no condition for upper construction, high-pressure grouting can be carried out from the bottom to plug the leakage.

Abnormal, paved with a lot of floor heating, very few cracks

Answer: (1) The thickness of the mortar protective layer on the floor heating pipe should be kept at 20mm, and it should be uniform to prevent uneven thickness.

2) After the mortar protective layer is poured, the plastering work should be done before the final setting of the cement mortar, and the health care time should not be less than seven days.

3) According to the performance of cement shrinkage 5, the shrinkage amount should be reserved in the large room and the expansion joint treatment should be done. When the warm area is more than 30m2, expansion joints should be set in the cement mortar protective layer. When the room is open and deep, there is an expansion joint every 6m, the width is 5mm, the depth is 10mm, and the joint is filled with soft waterproof ointment.

4) Add admixtures such as crack inhibitors to the protective layer of cement mortar to prevent cracks.

5) For rooms over 12m2, expansion joints with a width of 5mm and a depth of 5mm should be left on the ground around the floor. Prevent cracks in the protective layer of cement mortar, and fill soft waterproof ointment in the joints.

6) The junction with the wall and column should be filled with soft closed-cell foam with a thickness of 10mm.

Floor cracks in floor heating are a common problem in the use of floor heating. Here are some ways to prevent cracks in the floor heating floor:

1.Ensure the leveling of the base layer before installation. Underfloor heating systems require foundation bearing capacity, and if the ground foundation is uneven, it is prone to gaps.

2.Control indoor temperature and humidity. Excessive indoor temperature and humidity can cause the floor planks to swell and create gaps.

Therefore, proper humidifiers and dehumidifiers should be used to control indoor humidity.

3.Ensure the water temperature and water pressure of the underfloor heating system. Water temperature and water pressure that are too high or too low can cause the ground to deform and cause cracks. Therefore, the water temperature and water pressure of the underfloor heating system should be checked regularly to ensure that it is within the normal range.

4.Regular maintenance. After the underfloor heating has been used for a period of time, the floor needs to be cleaned, and the worn parts need to be repaired or replaced to ensure the normal operation of the system.

5.Install crack-resistant flooring. Some special wooden floors or stone floors have anti-crack properties, which can effectively prevent cracks in the floor heating floor.

In short, it is recommended to choose the right material before installing the floor heating system, and regularly maintain and inspect the floor heating system during use to avoid excessive use or deformation.

The heating of the floor heating pipe causes the thermal expansion of the concrete and thus the floor is the main reason, and the other reasons are mainly as follows:

1. The lower thermal insulation pad used when laying the pipe is too thin (the thermal insulation pad is used for thermal insulation and part of the deformation).

2. The concrete grade is low.

3. There are no expansion joints left around the wall (the expansion joints can be covered by baseboards) 4. Immediately after the pipe is laid, there is no time for the stress to gradually uniform during the drying process of the concrete.

5. The wet paving method can be changed to the dry paving method (the dry paving method is the state that the concrete can be kneaded into a ball by hand and scattered when it lands).

There are many main reasons for cracking in the ground where underfloor heating is installed:

1.The foundation leveling of the room itself was not in place, resulting in uneven polystyrene boards.

2.The polystyrene board is not solid, and the surface layer of fine stone concrete is easy to disturb when poured.

The PB pipe is embedded in the concrete, which reduces the effective cross-sectional size of the concrete floor, resulting in the cracking phenomenon of the floor heating floor.

4.It is also possible that the concrete shrinks itself and cracks.

There are six causes of ground cracking.

1. The settlement joints of civil engineering majors are unreasonable, resulting in uneven settlement of the entire ground;

2. The flexible settlement of the insulation layer in the heating structure is uneven;

3. The concrete grade does not meet C20;

4. The strength and thickness of the filling layer do not meet the requirements;

5. The construction technology of adding steel mesh is not adopted, and the linear expansion direction is uncertain;

6. The curing period of the concrete filling layer is short, less than 7 days.

Eight points of attention for geothermal use.

1. During the decoration process, you should be familiar with the floor heating structure, and effective protection measures should be taken for the floor heating system. It is strictly forbidden to remove the pressure in the pipeline, so as to facilitate the detection of damage to the floor heating system during the renovation process at any time.

2. Do not disassemble or modify the system without permission.

3. It is strictly forbidden to drill, drill holes and nail nails in the floor heating area.

4. The ground in the floor heating area shall not bear a load of more than 2t square meters. In the heavy object stacking area, erected scaffolding legs and trolleys and other contact parts with the ground, hard woodblocks should be supported to increase the contact area with the ground, so that the ground bearing meets the requirements of use.

5. It is forbidden to use the construction method of adding a wooden skeleton empty wooden floor, so as not to affect the heat dissipation of the system and damage the heavy pipes of the floor heating structure.

6. If users need to lay wooden flooring, they should try to use composite wood flooring, patchwork wood flooring and artificial composite flooring.

7. If there is leakage in the underground pipeline system, you can close the valves of each waterway on the water separator first, and ask the property management department or heating construction unit to deal with it in time.

1. Basal reasons.

The concrete floor is below the base surface of the concrete, and the flatness of the base surface determines whether the concrete plate can be evenly stressed, and when encountering heavy loads, there will be different thicknesses of the plates and different bearing capacity, resulting in the fracture of the demarcation part due to the different strength of the force. 2. Cement problem.

Cement is the main component of concrete, is the guarantee of concrete strength, if the use of expired cement or unqualified cement products, the concrete floor will be very prone to cracking and sand and dust drawbacks.

3. Aggregate problem.

Aggregates need to be added to concrete, mainly sand and gravel, but there are many choices of aggregates, and the size and material are different. If you choose fine sand and gravel (such as fine stone concrete used for the surface layer), it will be easy to sand and dust due to the increased shrinkage of the concrete. To reduce the possibility of concrete sanding, materials that are clean, contain less activated silica, and are continuously graded should be selected as much as possible.

4. The problem of water-cement ratio.

Concrete is composed of water, cement, sand, and gravel, and the general ratio is required.

The proportion of solid, liquid and gaseous states is 80%, 18% and 2% respectively. 5. The influence of temperature.

Because the concrete does not conduct heat, the heat dissipation is slow, but when the temperature rises and falls, the internal temperature is still high, and the external temperature of the concrete has been lost. If the concrete floor expands and shrinks externally, the concrete floor will be deformed due to temperature changes, especially when the large-area concrete is not cut according to the standard (6x6).

6. Maintenance issues.

After the construction of the concrete floor, there will be a dry shrinkage reaction in the case of water shortage, so it is necessary to retain water and cure, and surface cracks can be prevented by sprinkling water or using concrete curing agent.