If the building is penetrated by a large amount of water, the durability of the building will be greatly reduced, and even prone to safety accidents, resulting in casualties and property losses.

The wallboard at the gluing part shall be treated with primer to enhance the adhesion of glue.

Therefore, more preparations need to be made for the waterproof of precast buildings.

Before installation, the wallboard must be carefully checked to see whether there are cracks on the surface of the wallboard and around the embedded window frame.

According to the characteristics and various factors of precast buildings, it is concluded that water diversion is better than water blocking and drainage is better than waterproof.

In addition, check the installation quality of the embedded rubber strip, check whether the rubber strip is embedded firmly, whether there is damage, whether the rubber strip hardens and loses elasticity, and hoisting can be carried out only after there are no above quality problems.

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The backing depth shall be carefully checked before gluing, and the gluing thickness must meet the design requirements.

The processing accuracy of precast wallboard and concrete quality directly affect the installation accuracy and waterproof condition.

Because the exterior walls of precast buildings are assembled in blocks, it is inevitable to encounter the problem of waterproof treatment of connection joints.

The connecting iron pieces and connecting pieces inside the wallboard shall be sealed to prevent the iron pieces from rusting.

For precast buildings, especially those with precast exterior wall panels, the sealing and waterproof of joints is a key link that needs to be paid attention to.

The parts with local leakage must be carefully recorded, the causes shall be found and handled in time…

Fine adjustment requires that the deviation of the axis position and perpendicularity of the wallboard be adjusted to the allowable deviation range of the specification.

After the waterproof construction of the wallboard is completed, the water spray test shall be carried out in time to check the waterproof effect, focusing on the inspection of the wallboard joints, the joints between the precast wallboard and the cast-in-place structure and window frame, the external inspection of the drainage pipe for degumming and the normal drainage function, and the internal careful observation of watermark and water mark.

The glue outside the wall panel joint shall be operated in strict accordance with the process.

The accuracy adjustment of wallboard is generally divided into two steps: coarse adjustment and fine adjustment.

Rebar Cap

The actual construction generally requires no more than 5mm.

Operate in strict accordance with the process and do a good job in the quality inspection of each stage.

After construction, watering test shall be carried out to ensure no leakage.

After the construction is completed, the waterproof test shall be carried out to deal with the leakage problem in time.

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Do a good job of measurement and setting out before installation.

In addition to the datum line, the position line of the wall panel is also released to facilitate the positioning of the wall panel during hoisting.

In short, it is to guide the water flow into the building waterproof system, so as to achieve the building waterproof effect, slow down the building corrosion and improve the building durability.

Do a good job in product quality inspection before construction and installation.

The waterproof of buildings has always been a very important link in building construction, because the waterproof effect directly affects the function, service life and value of buildings.

Although these joints are small, they can easily become infiltration channels.

Rough adjustment is to decouple the wallboard in place according to the control line.

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