by At present, the development of precast buildings is in full swing.
With the promotion of national policies and economic development, the development level of precast building technology is higher and higher, and various quality problems in the early stage of the development of precast building are gradually reduced.
The good image of precast buildings is gradually moving from the industry to the market, and the waterproof problem of precast buildings has been solved.
Research background of precast building waterproof technology precast building is to split the structure of the building according to certain specifications, then prefabricate it in the factory, and then transport it to the site for assembly.
In particular, when the external protection system of precast buildings is spliced at the construction site, a large number of splicing joints will inevitably be left.
Although these joints are small, they can easily become infiltration channels.
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.
Therefore, more preparations need to be made for the waterproofing of precast buildings.
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 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.
Waterproof measures for precast buildings 1.
Check the product quality before construction and installation.
The processing accuracy and concrete quality of precast wallboard directly affect the installation accuracy and waterproof situation.
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.
Unqualified wallboards are strictly prohibited.
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.
2.
Measurement and setting out shall be done well before installation.
In addition to the datum line, the position line of the wallboard shall also be released to facilitate the positioning of the wallboard during hoisting.
The precision adjustment of wallboard is generally divided into two steps: coarse adjustment and fine adjustment.
Rough adjustment is to decouple the wallboard in place according to the control line.
Fine adjustment requires that the deviation of wallboard axis position and perpendicularity be adjusted to the allowable deviation range of the specification.
The actual construction generally requires no more than 5mm.
3.
Operate in strict accordance with the process and carry out quality inspection at all stages.
The glue outside the wall panel joint shall be operated in strict accordance with the process.
The backing depth shall be carefully checked before gluing, and the gluing thickness must meet the design requirements.
The wallboard at the glued part shall be treated with primer to enhance the adhesion of glue.
The connecting iron pieces and connecting pieces inside the wallboard shall be sealed to prevent the iron pieces from rusting.
After construction, watering test shall be carried out to ensure no leakage.
4.
After the construction is completed, the waterproof test shall be carried out to deal with the leakage problem in time.
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 parts with local leakage must be carefully recorded, the causes shall be found and handled in time.
In the development of precast buildings, we constantly find and solve problems, and summarize and develop new technologies according to the problems.
It is precisely because assemblers learn the spirit of responsibility that precast buildings can gradually gain a firm foothold in the market and be recognized and welcomed by users and the market.
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