The non-curing waterproof coating of acorn asphalt and the composite waterproofing technology of polyethylene acrylic waterproof coil are discussed

0 Introduction
Acorn asphalt non-curing waterproof coating is bullet-plastic paste, long-term contact with the air does not cure; Polyethylene acrylic waterproof coil and acorn asphalt non-curing waterproof coating, after the site process construction again composite, forming a waterproof layer. The materials used and the construction process are non-polluting to the environment, easy to operate, overcome the traditional waterproof coil construction in the empty drum, shedding, bonding is not secure quality defects, is one of the construction industry's ten new technologies, in Wu hunan Xiangwan Commercial Logistics City, a district 1 building and other projects, has achieved a very good waterproof effect
China
.1 Process Principle
Acorn asphalt non-curing waterproof coating by heating 150 degrees C, the use of spraying or scraping methods applied to the waterproof base surface, polyethylene acrylic waterproof coils and acorn asphalt, acorn as a adhesive polyethylene acrylic and base bonding firmly, coil joints can also be used acrylic glue can also be used to form a waterproof layer, waterproofing.2 Process Process
bushing treatment→ brushing cold bottom oil→ Spraying (scratching) acorned asphalt→ thickness, leak inspection and repair→ paving polyethylene acrylic→ Polyethylene propylene edge bonding→ special-shaped parts treatment→ quality acceptance→ waterproof protective layer construction 3 process features
1) acorn asphalt as both waterproof paint and polyethylene propylene binder.
2) Acorn asphalt non-curing waterproof coating can absorb the pull stress generated by grass-roots cracking, adapt to the grass-roots deformation ability, and can self-heal, waterproof effect is good.
3) strong environmental adaptability, suitable for project construction with tight duration. In a certain low temperature, high temperature, room temperature, humid environment can be constructed.4 process operation points
4.1 grass treatment
1) grass-roots surface using 1:2.5 mortar to do a good job of looking for flat layer, looking for layer thickness of 20mm.
2) The use of smudges and other manual scraping of the way butt seams, bolts, local corrosion and other weak parts, as well as cracking, corners and other weak parts for additional layer treatment.
4.2 Brush cold bottom oil
the grass is covered with cold bottom oil before the construction of acorned asphalt.
4.3 Acorn asphalt spraying (scratching) construction
1) after the substrate clean-up (if the paint primer needs to wait for the primer to be completely cured), open the heating tank, pre-pour the material into the filling heating, to the overall temperature of the coating reached the sprayable state (150 degrees C), with a special sprayer uniform spraying oak asphalt non-curing waterproof paint. Spraying can be adjusted according to the design thickness of different spray guns, waterproof layer once molded.
2) Yin and Yang corner position, ground beams, the side of the platform and other spraying is not convenient construction area using scratching construction.
4.4 leakage and thickness inspection and repair
sprayed a certain area, before laying the coil using needle testing to detect the thickness of the coating. If the thickness is not up to standard or local need to be strengthened, use a smear to take some paint, by hand scraping the way to make it. Spraying construction should be completed in segments or areas.
4.5 Polyethylene propylene
1) after spraying to cover the polyethylene propylene waterproof coil in time, to avoid excessive dust in the field glued to the surface of the acorn asphalt coating and reduce the adhesion between the acorn asphalt coating and polyethylene propylene waterproof coil.
2) Acorn asphalt not only as a waterproof coating, but also as a adhesive for the upper polyethylene acrylic waterproof coil, each time the application width of the acorn asphalt coating should be slightly wider than the upper layer of polyethylene propylene waterproof coil, When laying polyethylene propylene waterproof coils should be tightly pressed at one end waterproof coils, evenly spread forward extension, scrape flat, out of the internal bubbles, each adjacent polyethylene propylene coils between the tie length must be greater than or equal to 100mm.
4.6 Polyethylene acrylic waterproof coil edge bonding
1) when paving polyethylene propylene coil, attention should be paid to the cleaning of the coil edge part, first with the coil edge treatment agent for the coil edge pre-position Treatment, and then the coil special adhesive with a brush uniform coating on the edge of the coil open two bonding surface, after 10-30 minutes, the feel of non-stick hands can be bonded, while excluding air while pressing.
2) the edge adhesive of the coil can also use acorn asphalt coating, the upper coil open, with a good heating of the acorn asphalt scraping and the lower coil joint, quickly glued the upper coil to the acorned asphalt, scraping flat pressure.
4.7 special-shaped parts of the treatment
construction, the first yin and yang angle, plane and facade corner and other details of the first part of the acorned asphalt scraped, and polyethylene acrylic coil cut into the corresponding shape attached, can also be first constructed waterproof layer and then construction waterproof additional layer, that is, the additional layer on the outside of the waterproof layer, as shown in Figure 1.
Somable part waterproof additional layer
4.8 protective layer construction
waterproofing project after the completion of the construction of covert acceptance, such as roofing project construction should do a good job of water storage test, experience after qualified, waterproof protective layer construction.5 Quality Standard
5.1 Acorn asphalt coating waterproof layer quality standard
1) According to the design requirements to determine the acorn asphalt waterproof coating material and matching ratio.
2) The waterproof layer of the acorn asphalt coating and its detailed nodes in the corner area, basement deformation seam, through the outer wall pipe, etc. should meet the requirements of design and specification.
3) The structure base of the acorn asphalt coating film should be flat and solid before construction, and the base surface should be clean, there should be no loose base surface, empty drum, sanding and grass peeling, etc. ;
4) Acorn asphalt waterproof layer should be firmly bonded with the structural base, and must be smooth surface, uniform application, there must be no surface creases, bubbles, exposed tire body and other quality defects.
5) The average thickness of the waterproof layer of the acorn asphalt coating should meet the design requirements, and the minimum brush thickness must be greater than or equal to 80% of the design thickness.
6) the protective layer of the waterproof coating film of the side wall and the waterproof layer should be firmly bonded and closely combined to ensure uniform thickness.
5.2 Polyethylene acrylic coil waterproof layer quality standard
1) coil waterproof layer used in polyethylene propylene and its main supporting materials must meet the requirements of design and related specifications.
2) Polyethylene acrylic coil waterproof layer and coil corner part, structural deformation seam part, through the outer wall pipe part and other detail nodes of the practice must meet the requirements of the design.
3) Polyethylene acrylic coil waterproof layer of the grass should be solid and reliable, the grass surface should be flat and clean, to prevent the appearance of loose grass, surface empty drum, sand and peeling phenomenon;
4) Polyethylene acrylic waterproof coils should be firmly bonded (welded) knots, tightly sealed, to eliminate the appearance of material creases, coil edges and internal foam and other quality defects.
5) The protective layer of polyethylene acrylic waterproof coil on the basement side wall and the waterproof layer of the coil should be reliably bonded, closely combined, and ensure that the thickness of the waterproof layer of the coil is uniform and consistent.
6) Polyethylene acrylic waterproof coil length allows deviation of -10mm.6 Conclusion
Acorn asphalt non-curing waterproof coating and polyethylene acrylic waterproof coil are new waterproof materials, the formation of a composite waterproof construction process for waterproof new technology, its construction points are different from the conventional waterproofing process. In addition to the above key construction measures, we should still focus on checking the quality of grass-roots treatment, yin and yang corner and construction seams and other detailed treatment quality, strengthen the quality supervision and inspection of the site, improve the quality awareness of operators, in order to achieve the ideal waterproofing effect.