Waterproofing technical measures for roofing works in housing construction

Roof waterproofing is an important part of roof engineering design and construction of housing buildings. Due to the impact of wind blowing, sun, rain, snow and other harsh natural environment and the deformation of the grass-roots structure, for a long time, the leakage problem of waterproofing of linoleum asphalt coils on roofs has become a common problem in the quality of construction projects that plague design, construction and use units. And SBS, APP and other modified asphalt coils also failed to reflect its advantages, often appear roofing film cracking, foaming, mating site loose, opening mouth and other phenomena, resulting in economic property losses, seriously affecting the life of the building . Solidification (GT) waterproof coating film can prevent the surface cracks caused by the waterproof layer fracture and other phenomena, for the thorough treatment of the construction (structure) of leakage and corrosion problems, improve the quality of the project, to ensure the use of functions opened up a practical and effective way.
1 Solidification (GT) coating waterproof material performance
solidification (GT) coating material developed by the new Xinjiang Institute of Waterproofing and Protection Technology, G, T, respectively, solidified polymer slurry and coating materials in Chinese Pinyin initials. "Solidification" refers to the process by which a liquid or crystal or non-crystal becomes an elastomer or rigid body in a short period of time under certain physical and chemical action. Solidification (GT) coating material with a variety of polymer materials as the main body, modified by a variety of additives, processed in a specific production process, is a new type of synthetic polymer waterproof, protective chemical slurry. Solidification (GT) waterproof coating film mainly has the following characteristics:
(1) coating film just soft, can be extended, flexible, can adapt to the changes in the grass-roots.
(2) strong bonding force with other materials, can form a seam-free waterproof film, good overall, strong impermeability.
(3) coating waterproof layer is elastic and follows the cracks in the base surface.
(4) non-toxic, tasteless, non-polluting, safe and harmless to human body, conducive to meeting environmental protection requirements.
(5) cold construction, can be worked on a damp substation, no maintenance, can shorten the construction cycle.
(6) weather resistance is good, high temperature does not flow, low temperature does not crack, waterproof layer long durability.
(7) can make up for the defects of concrete, play the role of reinforcement and reinforcement, and extend the service life of concrete buildings.
(8) advanced technology, reliable technology, simple construction, no burns, burns, can be manually applied, can also be sprayed at high pressure.
(9) coating layer changes color and is easily coordinated with the surrounding environment.
Due to the excellent performance characteristics of solidified (GT) coating waterproof materials, to solve the traditional asphalt coil easy aging, easy cracking, pollution, seam leakage and other waterproof problems, widely used in housing roofs, basements, kitchen toilet rooms, swimming pools, civil defense works, subways, reservoirs, tunnels and other construction projects waterproof, impermeable and anti-corrosion treatment. Especially suitable for the opposite sex complex grass surface waterproof; The project is waterproof under the environment of seasonal, day and night temperature difference changes; Corners, facade nodes, waterproofing of the port area; Maintenance of waterproof protection of old asphalt linoleum roofs; Waterproofing of slopes, facades or tops, as well as for large slope buildings.
2 Roof solidification (GT) coating waterproof design technical measures
based on solidification (GT) waterproof coating film overall, easy construction, and has a good follow-up to the grass-roots surface, when the building roof slope is larger, more facilities or irregular plane shape, suitable for the use of solidification (GT) waterproofing The coating is a waterproof layer of the building roof, and its waterproof design in engineering applications should meet the following technical requirements:
(1) roof solidified (GT) waterproof coating film should be layered and coated; If the tire body enhancement material needs to be laid and the roof slope is less than 15%, it can be laid parallel to the roof ridge; When the roof slope is greater than 15%, it should be laid perpendicular to the roof and operated upward from the lowest point of the roof. The long-side tie-up width of the tire body reinforced material must not be less than 50 mm and the short-side joining width must not be less than 70 mm. When using 2 layers of tire body enhancement materials, the upper and lower layers should not be laid vertically to each other, seams should be staggered, the spacing should not be less than 1 /3 of the width. The additional tire body enhancement material added along the looking flat separation seam should have a width of 200 to 300 mm.
(2) Roof solidification (GT) waterproof coating film in the yin and yang corner of the roof, eaves, trenches, water drops around and roofing facilities root, should be added 1 or more additional layer of enhancement layer. The additional enhanced layer is made of solidified (GT) waterproof coating scraping body enhancement material.
(3) roof solidification (GT) waterproof layer thickness and number of coatings should meet roof waterproof rating and service life requirements, as shown in Table 1.
Roof solidification (GT) waterproof coating film thickness and number of coating times
3 Roof solidification (GT) coating waterproof node construction measures
That is, the grass-roots clean-up flat after scraping plastic waterproof layer, curing and inspection after passing the brush solidification (GT) flexible waterproof layer 1 channel, paved 1 layer of hot-tie non-woven fabric, and then brush solidified (GT) flexible waterproof layer 2, and finally do protective layer. Specific construction measures are shown in Figures 1 and 2.
The water height of the roof of the house building should not be less than 250 mm, the roof and daughter wall should be coated with solidification (GT) waterproof additional layer, reinforced concrete eaves or trench net width should be ≥200 mm, in addition to solidification (GT) waterproof coating film, should also be added solidification (GT) flexible material 1 channel. The structural measures at the roof flood and eaves are shown in Figures 3, Figure 4 .
House surface water-flooding structure
roof eaves ditch structure
deformation seam is the part of roof deformation concentration, the focus of its structural design is to prevent rainwater through the roof deformation seam into or seep into the building interior, thereby destroying the ceiling and walls. Deformation seams not only need multiple defenses, but also to ensure that when the width of the seam changes, will not cause damage to the waterproof layer. The solidification (GT) waterproof construction measures of the roof deformation seams are shown in Figure 5 .
Roof deformation seam construction
4 roof solidification (GT) coating waterproof construction technical measures
solidified (GT) high polymer waterproof coating film consists of powder and solidification (GT) polymer emulsion, when used in the construction site mixed with uniform slurry, brushed on a solid wet substate, no maintenance, no fire roasting, no glue, normal temperature solidification after the formation of a soft and soft overall waterproof layer. Solidification (GT) coating material hydromassive, wet base in the face of its curing, maturation, film-forming but has enhanced the promotion effect, so the duration of the urgent time can continue to work, shorten the duration. Construction solidification (GT) coating film waterproof should be in accordance with the construction technology requirements of ingredients, to achieve accurate proportions, yin and yang angle, pipe mouth, binding point of the detailed operation to repeatedly check the adhesion after the film, requiring professional waterproof personnel to carry out construction. In addition, roof solidification (GT) coating construction should also pay attention to the following points:
(1) solidification (GT) coating waterproof layer before construction, should be the base level of dust, sand, debris, debris, debris and mortar moths removed clean, protruding sharp corners applied to the grinding wheel smooth, the construction process should also be cleaned at any time, to maintain the solid foundation, flat, clean.
(2) to carry out a comprehensive inspection of the grass-roots level, slope, surface quality, sub-seams, water drop, trench, water angle, eaves, eaves, daughter wall, pipe root, roof entrance and exit and other detailed structure should meet the specification requirements, the non-conforming parts should be treated first.
(3) after cleaning the grass roots, the drying degree of the grass roots is first detected.
(4) The grass surface should not have too large cracks, if there are cracks should be coated solidified (GT) flexible coating film, if the cracks are too wide more than 3 mm, should first fill solidified (GT) elastic latex, add non-woven fabric, and scrape solidified (GT) elastic material.
(5) before a large area of film coating, should first rainwater mouth, yin and yang angle, water, tiangou, eaves, roof entrance and exit and other special node parts for additional enhancement treatment, paving tire body enhancement materials should be relaxed, should not stretch too tight, coating waterproof layer head should be more than 20 mm of tire body enhancement material, and should be added twice more paint to strengthen.
(6) solidified (GT) coating film construction, according to the thickness specified in the design, after testing to determine the number of brushes and the amount of paint per unit area, according to the number of ingredients to control the painting area, to ensure the thickness and uniformity of the layer.
7) Waterproof coating film should be spread throughout the brush, each brush should be thick and consistent, and each brush direction and the previous vertical, brushing width greater than 20 mm, tight connection, to prevent leakage brush.
(8) the waterproof layer is completed, no nail shoes shall be worn to stampede, the waterproof coating film shall be damaged before curing, and no construction articles shall be stacked on it or other construction work shall be carried out.
5 Knot
Solidified (GT) coating film as a new polymer waterproofing material, technical indicators have fully met the requirements of use, solidified (GT) waterproof material applied to building roofing engineering is of great significance to solve the roof leakage problem. Solidification (GT) waterproof coating film has been used in many large and medium-sized engineering projects, such as Urumqi Tianshan International Hotel, friendly shopping malls, commercial inspection business building, etc., successfully solved the waterproof, impermeable, anti-freeze and melt problems, and achieved good economic and social benefits.