How to prevent the concrete waterproofing of the embedded part is not in place?

In order to prevent the concrete waterproofing of the embedded part from not being in place, we must first know the reason why the concrete waterproofing of the embedded part is not in place.

1. The reasons and manifestations of the concrete waterproofing in the embedded part are not in place.

1) The concrete foundation sinks unevenly and cracks.

2) The mixing ratio of the mixed soil is not strictly controlled, and the strength is not guaranteed.

3) Concrete plastering shell, cracks, pitting, unevenness.

4) After pouring the concrete, the hydration heat of the cement is very large, the internal temperature rises significantly, the surface heat dissipates quickly, and the surface tensile stress increases to form a large temperature difference, and when the surface tensile stress generated by the temperature difference exceeds the limit of the concrete, the concrete will produce cracks on the surface.

5) In the construction of large-volume waterproof concrete, no active and effective anti-cracking measures are taken, and the waterproof concrete is the same as the general concrete, resulting in cracking.

6) The seams of the formwork are not treated tightly, resulting in dislocation and cracks.

2. The concrete waterproofing of the embedded part is not in place, and the preventive treatment measures are not in place.

1) The amount of concrete, cement and cement ratio, and sand ratio should not be too large; Strictly control the mud content of sand and gravel, avoid the use of excessive silt, vibrate to be compact, improve the tensile strength of the mixture, and reduce the shrinkage. Strengthen the early curing of concrete, and appropriately extend the curing time, and regularly and appropriately sprinkle water to keep it wet. Before pouring concrete, water the base and formwork thoroughly.

After the concrete is poured, it should be cured with sprinkler water as soon as possible.

2) The embedded concrete should be waterproof designed.

3), the arch back and other structures that have been waterproof design, strictly check and control the quality of waterproof materials, when there is no standard, the design unit can only purchase and construct after the standard, strictly control the construction quality, and prevent the thickness is not enough, uneven, hollow, paste is not firm and the construction is not in place.

4) Strictly control the thickness of the protective layer of the steel bar in the embedded concrete part, strengthen the health of the concrete in the part of the body, and prevent the occurrence of shrinkage cracks.

The weak part of the waterproof concrete is the concrete construction joint, post-pouring belt and other stubble parts, which must be constructed in strict accordance with the design requirements and specifications, such as the treatment of waterproof steel plates, the chiseling of stubble concrete, etc.

According to the norms, it is said that there is really a lot of water leakage, and there is only maintenance of leakage, which is also a normal phenomenon, hehe, more information, better advice, free professional technical consultation on concrete waterproof leakage water repair, exempt from repairing today, leaking tomorrow; Repair every year, the trouble of leaking every year.

Take a look at the waterproof concrete design code, and consider setting up a waterproof board at the location of the construction joint.

If the post-pouring belt is constructed in the case of water, it is difficult to clean the joint, and the waterproof quality of the joint cannot be guaranteed, so when the groundwater level is high, it is necessary to stop the water in advance to ensure that the post-pouring belt is constructed under waterless conditions. If the construction measures of the advanced water stop are improper, the flexible waterproof layer is arched under the action of water pressure, and can not play the role of the advanced water stop.

When the post-pouring belt needs to stop the water in advance, the following construction measures can be taken:

Figure 3-24 Advance water-stopping structure of the post-pouring belt.

1-concrete structure 2-steel wire mesh 3-post-pouring belt 4-caulking material 5-external waterstop.

6-fine stone concrete protective layer 7-membrane waterproof layer 8-cushion concrete.

2) paving prefabricated reinforced concrete slab or steel plate at the local thickened concrete of the post-pouring belt position, and the waterproof structure of the bottom plate post-pouring belt is advanced and waterproof as shown in Figure 3-25 and Figure 3-26. That is, digging a groove under the bottom plate after pouring the belt part, the concrete cushion is also poured into a groove shape, and then laying a flexible waterproof layer such as waterproof membrane, and then paving a prefabricated 60mm thick reinforced concrete slab or a 5mm thick steel plate in the groove, and the surface of the plate surface and the fine stone concrete protective layer of the flexible waterproof layer should be kept flush.

Figure 3-25 The waterproof structure of the bottom plate with the advanced waterproof belt after pouring the bottom plate.

1-concrete cushion 2-waterproof concrete bottom plate 3-bottom plate post-pouring belt 4-waterproof reinforcing layer.

5-bottom plate flexible waterproof layer 6-water expansion rubber 7-bottom plate precast concrete protection board 60mm thick.

Figure 3-26 Advance waterproof structure of the bottom plate with a backpouring belt.

1-concrete cushion 2-waterproof concrete bottom plate 3-bottom plate post-pouring belt 4-waterproof reinforcing layer.

5-Bottom plate flexible waterproof layer 6-Expansion rubber in case of water 7-steel plate 5mm thick.

3) When carrying out the construction of the advanced water-stopping of the post-pouring belt of the vertical wall, the steel plate with a thickness of 5mm or the prefabricated reinforced concrete slab with a thickness of 60mm should be fixed at the post-pouring belt position, and the waterproof membrane should be laid at the same time as the concrete vertical wall that has been poured, and a continuous and integral flexible waterproof layer should be formed. Figure 3-27 shows the waterproof structure of the side wall with a back-poured belt ahead of the water.

Figure 3-27 Front-stop waterproof structure of the side wall back-poured belt.

1-waterproof concrete siding 2-siding post-pouring belt 3-water expansion rubber.

4-wall protective steel plate 5mm thick 5-polyethylene foam protective layer.

6-vertical wall precast concrete protection board 60mm thick 7-waterproof reinforcement layer 8-flexible waterproof layer.

Waterproofing is no longer a new topic, whether it's tunnels or bridges.

Beams, embankments, roads, and buildings are also the houses we live in every day, and waterproofing cannot be ignored. At the same time, the electrical products we use in our daily life also have the problem of waterproof and moisture-proof that must be faced.

Source: "Historical Records: Zhou Benji": "Zhao Gong said: 'It's a good thing.'" The mouth of the people is more waterproof than waterproof. The Chinese language is written as "Fangchuan".

The water-based cyclooxyelastic grouting glue is derived from diatom gum, BAI rubber, modified resin, expansion agent, cross-linking agent and ZHI

A DAO developed from a variety of substances

It has good sealing and water retention, high expansion water retention, and strong adhesion, and can be applied to expansion joint plugging.

Water-based epoxy elastic grouting glue can be grouting and water stop in both dry and wet environments (the grout can quickly expand and disperse to form a glue consolidation body after encountering water, blocking the leakage channel, and the dry crack grouting of concrete structure can expand 3-5 times when exposed to water after grouting and solidification, preventing the penetration of water), and has the dual functions of sealing and filling joints and plugging leakage and stopping water.

First of all, the handover acceptance of the screed layer should be carried out. The leveling layer has a great impact on the waterproof layer, especially the pipe root and yin corners, and there should be no sand holes, cavities and wall burrs.

In many cases, like why, the bathroom and kitchen ground have a waterproof layer, but it is easy to be damaged when redecorating, therefore, these places must be waterproof, and some small places should also pay special attention, otherwise the decoration is not good, and it is easy to leak in the future, and it is also very troublesome to repair, so let's take a look at which places need to be waterproofed!

What are the home improvement waterproof areas Home improvement waterproof precautions.

Clause. 1. Resurface the floor tiles.

When the kitchen and bathroom floor is renovated, the waterproof layer is the most likely to be damaged. When repairing, try to protect the original waterproof layer, and once damaged, it should be repaired in time and re-made the waterproof layer. When replacing the floor tiles, after the original floor tiles are removed early, they should be smoothed with cement mortar, and the slurry should be evenly coated on the wet base surface with a brush, scraper or roller with waterproof paint to prevent leakage and sand holes, and then apply the second layer after the first layer is dry.

Pay attention to the intermittent stirring of the slurry during the construction process to prevent precipitation, and the mixed slurry should be used up within 20-40 minutes.

Clause. Second, the wall adjacent to the bathing equipment.

When the washbasin and sink are used, the water will splash on the adjacent wall, and if there is no waterproof protection, the wall is prone to dampness and mildew. Therefore, before laying the front tiles, you must do a good job of waterproofing the wall, but the non-heavy lightweight wall must be at least meters high, and it is best to make the entire wall waterproof. The waterproofing of the wall adjacent to the shower location should also be metre-high, and the height of the wall waterproofing coating adjacent to the bathtub should also be higher than the upper edge of the bathtub.

Clause. 3. The joints between the wall and the ground, the upper and lower water pipes and the ground.

Leakage mostly occurs in the pipe roots, floor drains, sanitary ware and yin and yang corners that pass through the floor. The reason is that the pipe root, floor drain and other parts are loose, the bond is not firm, the painting is not tight, the waterproof layer is partially damaged, and the length of the parts is not enough. These edges and corners are the most prone to leakage, pay attention to the construction of weak parts and detail nodes, and the waterproof coating must be applied in place.

When pipes, floor drains, etc. pass through the floor slab, the waterproof layer around the cavity must be carefully constructed. The upper and lower water pipes should be covered with cement mulch, brush 10 20 cm of waterproof paint from the ground, and then make a waterproof layer on the ground to form a composite waterproof layer to enhance the waterproof performance.

What are the home improvement waterproof areas Home improvement waterproof precautions.

Clause. Fourth, the wall of the buried water pipe.

In the wall buried water pipe, should be made larger than the pipe through the groove, the groove plastering is smooth, and then brush the waterproof paint in the groove for waterproof treatment.

Clause. 5. Sewage outlets and floor drains.

The floor of the kitchen and bathroom must be sloped to the floor drain to ensure smooth drainage and no water accumulation. The waterproofing material of the bathroom is particularly important, and the original drainage and sewage pipes and floor drain should be avoided as much as possible during the decoration.

The detailed node structure is the key to the construction of underground waterproof engineering, and in order to ensure the overall effect of waterproofing, the detailed node construction must be strengthened.

1. It is strictly forbidden to set up construction joints at the junction of the basement floor and the shear wall, if you need to set up, you must be set up at about 5oomm of the shear wall from the bottom plate, and it is best to use steel plate rubber waterstop, and the construction joints are evenly coated with cement-based permeable crystalline waterproof materials, and the waterstop is added on both sides of the waterstop to expand and stop the glue in case of water. Such a comprehensive multi-place fortification, simple operation, basement waterproof effect is obvious.

2. When the waterstop plate at the deformation joints such as settlement joints and expansion joints is set, the grouting pipe type water-stop strip is used to replace the traditional water-stop strip, and its maximum water absorption expansion rate is 150%-300%, and the water pressure resistance is 20 30mm. The installation is convenient and concise, and the product is equipped with a special grouting pipe joint at the factory, which is conducive to later leakage treatment. The grouting pipe provides good grouting conditions for the treatment of leakage in the later stage, avoids repeated slotting and other processes, and is conducive to saving construction costs.

The gaps at the deformation and settlement joints are caulked with polysulfide sealing paste. It has good aging resistance, excellent water resistance, elasticity, adhesion, compression recovery, and excellent oil resistance and solvent resistance, and can maintain good physical and mechanical properties under the conditions of continuous expansion and contraction, vibration and temperature changes.

It is used in all kinds of expansion joints and deformation joints in basement waterproof projects to prevent leakage and caulking sealing, and the effect is remarkable.

The wall bolts used for the wall casing and formwork must be welded with a metal waterproof ring in the middle position, and the pre-embedding is accurate; This traditional method of construction is complex, difficult to operate, especially the welding of metal waterproof ring in the middle of the wall bolt, and the wall should be cut off before plastering after demoulding, and anti-corrosion with paint, the workload is large, and the cost is high. If the water-proof expansion water-stopping glue is used instead of the welded metal water-stop ring, the operation is simple, the cost is low, and the anti-seepage effect is remarkable.

4.Pile head waterproof node treatment.

Pile foundation is often adopted under the basement cushion cap bottom plate, and the number of pile heads is large, because there is a construction joint between the pile head and the new and old concrete of the cushion cap plate, and the membrane waterproof layer can not close the intersection at the pile head position, and the reinforcement of the pile head part is dense, and the waterproof is the most difficult to deal with. Therefore, the waterproof node of the pile head and the cushion cap has become the key point of the bottom plate waterproofing project.

According to the structural design and construction requirements of the design drawings and the corresponding impermeability level of concrete.

1. When pouring concrete, when the concrete mixture is discharged from the hopper, funnel, concrete conveyor pipe and transport vehicle, if the free falling height is too large, because the coarse aggregate is under the action of gravity, the falling kinetic energy after overcoming the adhesion force is large, and the falling speed is faster than that of the mortar, so concrete segregation may be formed. For this reason, the free height of concrete falling from a height should not exceed 2m, and the limit of free falling height in the vertical structure should not exceed 3m, otherwise it should be cut along the chute, string tube, slip pipe or vibrating slide pipe to achieve the purpose of buffering.

2. Adjust the water consumption of concrete and control the water-cement ratio.

It should refer to the protective layer. It is called fine stone concrete waterproofing layer, and it also has this word in the roof grade.

It is mentioned in the "Waterproof Construction of Ordinary Fine Stone Concrete on the Roof" that the steel mesh in the waterproof layer of fine stone concrete should be placed in the upper part of the concrete during construction. This is clearly a protective layer approach.

How to distinguish the roof waterproof grade.

Roofing ordinary fine stone concrete waterproof construction.