What is Basement Exterior and Interior Waterproofing?

The membrane waterproofing should not be done internal waterproofing, the membrane should be done on the outer wall, that is, the water surface, and the water infiltrated into the inner wall will jack up the membrane and form a hollow drum.

Basement waterproofing construction plan.

One: the construction of the external anti-external sticking method, the external anti-external sticking waterproof method, that is, in the bottom plate cushion.

Lay a membrane waterproofing layer on the membrane and envelope the structure.

After the construction of the wall is completed, the façade membrane (waterproof layer) is directly paved on the outer wall of the enclosure structure, and then the basement waterproof construction method of protective measures is taken. The advantage of this basement waterproof construction scheme is that with the passage of time, the concrete of the enclosure wall will gradually dry, which can effectively prevent indoor moisture, but when the foundation pit adopts large excavation and sheet pile support, measures need to be taken to solve the problem that the horizontal support part affects the basement leakage. Basement waterproofing construction plan two:

The construction of the external defense and internal paste method, the external defense and internal paste method is to complete the permanent protective wall on the bottom plate cushion, and then pave the membrane (waterproof layer) on the permanent protective wall and the bottom plate cushion, and wait for the basement waterproof layer to be completed, and finally pour the concrete of the enclosure structure. This basement waterproof construction scheme is a basement leakage plugging construction method that has to be adopted because the construction environment conditions are limited and it is difficult to implement the external anti-external sticking method. Basement waterproof construction plan three:

In addition to taking waterproof measures on the concrete wall of the enclosure structure and its inner surface, in order to meet the requirements of basement plugging construction, the basement waterproof construction scheme adds one off-wall type inner wall on the inner side of the main wall. Although the basement waterproof design scheme is multi-channel fortification and conducive to drainage, there are problems such as high cost, the wall of the enclosure structure is not easy to be fully dried, and it is difficult to ensure the water tightness of the concrete joints of columns and walls.

Waterproofing is done on the outside of the exterior wall panel of the basement structure (facing the water), which is called "external defense and external sticking". 2. The supporting pile is hung with net and plastered flattening, and then the waterproof membrane is laid on the enclosure structure, which is called "external defense and internal paste". If the pre-paved membrane is used for waterproofing, the structural concrete wall panel is directly connected to the waterproof structure, and this process is called "pre-paved anti-adhesive".

3. Before tying the basement floor, do waterproofing on the cushion, which is called "external waterproofing". If the pre-paved membrane construction is adopted, the waterproof membrane layer is not made a protective layer, and the structural concrete floor is directly poured on the waterproof layer, which is also called "pre-paved anti-adhesive". 4. After the concrete of the basement floor is completed, the inner structural plate surface (back water surface) is waterproofed, which is called "internal waterproofing".

Basement indoor waterproofing is the waterproof layer made on the outside of the basement floor, and the internal waterproofing is the practice of pouring the bottom plate and then making a waterproof layer on the bottom plate surface. Gluing the membrane waterproof layer to the frontal surface of the underground engineering structure is usually called external waterproofing, and sticking to the back surface is called internal waterproofing. But the internal waterproofing can not protect the main structure, so the underground waterproofing to do the internal waterproofing is very dangerous, cement concrete in the underground for a long time by the corrosion of water and acid and alkali salts, generally as long as the external waterproofing can not be done internal waterproofing is mainly used in the waterproofing of the underground part of the structure

The waterproof layer is on the outside of the main structure, and the waterproof measures such as blocking water from invading the main body are called external waterproofing, which is suitable for places with large fluid pressure; On the contrary, the waterproofing layer is on the inside of the main structure, called internal waterproofing, and is used where the pressure is relatively small.

Under what circumstances should a basement be waterproofed? What is the difference between its outer waterproofing and internal waterproofing.

Kiss! Hello, happy to answer your <>

Under what circumstances should the basement be waterproofed, the method is as follows: First, the construction method of the basement moisture-proof treatment is usually: first wipe the surface of the outer wheel of the basement wall with a thickness of 20mm 1:

2. Waterproof mortar, the basement wall should be built with cement mortar, and the ash joints must be full; And the basement floor and the first floor are divided into two wall horizontal moisture-proof layers. The outer perimeter of the basement wall should be backfilled with soil with poor permeability in layers. 2. When the design groundwater level is higher than the top surface of the basement floor, waterproofing treatment must be done.

Due to the good waterproof effect of external waterproofing, it is widely used. Internal waterproofing is generally used for repair works. 3. The membrane waterproofing should first be done for the waterproofing of the basement floor during construction, and then the membrane should be continuously pasted to the outer surface of the wall along the basement floor.

Basement floor waterproofing begins with a C10 concrete cushion poured at the base with a thickness of about 100mm. Then paste the coil, and then smear 20 thick 1:3 cement mortar on the coil, and pour the reinforced concrete bottom plate.

The outer surface of the wall is first smeared with 20mm thick 1:3 cement mortar, cold bottom oil, and then pasted with coil, the paste of the coil should be staggered, and the lap width of the adjacent coil is not less than 100mm. The upper part of the membrane should be about 500mm higher than the water level, and the outer side should be built with a half-brick parapet wall.

Fourth, the improvement of waterproof performance: 1. Aggregate graded concrete is to use aggregates of different grains to grade and improve the content of cement mortar in concrete, so that the mortar is filled between the aggregates, so as to block the water seepage path due to the non-compactness between the aggregates, and improve the waterproof performance; 2. External concrete is to add aerating agent or compacting agent to concrete to improve impermeability. Hope mine can help you <>

Do you have any other questions?

When it comes to basement interior wall waterproofing, how do construction companies carry out basement interior wall waterproofing at this stage, and what is the basic situation of main waterproofing? The following is the relevant content of the professional construction terminology of basement interior wall waterproofing compiled by Zhongda Consulting, and the basic situation is as follows:

Basic situation of waterproofing of basement interior walls:

1. Pouring concrete.

The basement exterior wall formwork must be fastened with a disposable water-stopping screw.

The outer wall of the basement shall be retained as required for construction joints and post-pouring belts. The construction joint or post-pouring belt must be temporarily sealed with a steel plate mesh and a waterstop shall be set up according to the regulations.

The formwork sets aside a cleaning opening, and the garbage in the wall is cleaned up in time before the mold is closed.

Strictly control the slump of concrete, and the first grade of concrete should be timely, and no construction cold joints should occur.

After removing the mold, attention should be paid to covering and timely maintenance. The exterior wall demoulding time should not be too early (should be with the mold for 7 days), and the maintenance time should not be less than 14 days.

After the curing is completed, the disposable water-stopping screw is cut in time, and the end of the screw is closed with polymer cement mortar.

2. Tension screw treatment.

According to the follow-up "one-time damage and burial water-stopping screw node processing".

3. Defect repair.

Before the construction of the waterproof layer, the defects of the concrete exterior wall should be carefully repaired to ensure that the base layer meets the construction requirements of the waterproof layer.

For general defects and cracks that the crack width is less than the concrete surface cracks, pores and general defects, first fill and level with concrete repair fiber, and polish and smooth after drying.

When the crack width is exceeded, the pipe can be slotted and buried on the concrete surface, and the concrete crack can be repaired by pressure grouting method. Pressure grouting should be constructed by a professional company, and the project department should organize relevant units to review the special construction plan before construction.

4. Waterproof additional layer.

Before the waterproof additional construction, the external wall base should be polished and smoothed, the defect repair should be completed, and the screw groove has been treated and smoothed.

In the exterior wall construction joints, post-pouring belts, the bottom plate and the exterior wall junction, screws and other positions according to the requirements of the construction of waterproof additional layer.

5. Waterproof layer.

After the acceptance of the waterproof additional layer, the construction is not less than 2mm thick polyurethane waterproof coating film, or not less than 4mm thick membrane waterproof layer.

6. Waterproof protective layer.

Construction of 30 thick polystyrene board waterproof protective layer.

When the water level of the basement is high and the acceptance is permitted, a 120-thick non-clay brick wall can be used as a waterproof protective layer.

7. Outdoor backfill.

Attention should be paid to protecting the waterproof protective layer when backfilling, and no damage should be caused to the waterproof protective layer.

The backfill soil quality must meet the needs of the backfill, and the construction waste shall not be used as backfill.

The backfill must be compacted in layers according to the regulations, and the compactness is 93.

Dear, hello, there are many kinds of waterproof materials for basement exterior walls, and the commonly used ones are as follows: asphalt waterproof coating: asphalt waterproof coating is one of the most common waterproof materials, with corrosion resistance, acid and alkali resistance, good weather resistance and other characteristics, but it needs to be heated when used, and the construction is more troublesome.

Polyurethane waterproof coating: Polyurethane waterproof coating is one of the more popular waterproof materials at present, the construction is simple and convenient, and the front wheel can be directly painted on the base layer, with good elasticity and crack resistance. Polymer waterproofing membrane:

Polymer waterproofing membrane is a kind of prefabricated waterproof material, which has the advantages of convenient construction, good waterproof performance and long service life, but it requires professional construction. Extruded plastic board: extruded plastic board is a new type of waterproof material, which has the characteristics of low thermal conductivity, good waterproof performance and long service life, but it is high.

Therefore, the choice of which basement exterior wall waterproofing material needs to be considered comprehensively according to the specific situation, such as budget, construction difficulty, waterproofing effect, etc. It is recommended to consult a professional waterproof construction company or waterproof material supplier for detailed consultation and comparison.