The waterproof construction process details are very important

Coil waterproofing is a type of building material that is generally used in building walls, floors and outdoor roads, landfills and other places. This type of building material is very flexible, and it is generally used as a non-leaking link between foundation works and buildings. The basic process of the project. Then, the next small series for everyone to introduce membrane waterproof construction process.

Coil waterproof construction process

1, grassroots cleanup

Before the construction, the qualified grass-roots level shall be cleaned and the dryness of the base layer shall be determined to meet the construction requirements.

2, positioning, bombing

(1) According to the design requirements and the direction of laying the web, the lap width is placed on the line, and the ink line is played on the base layer.

(2) When the roof slope is less than 3%, the coiled material should be laid parallel to the ridge; when the roof slope is ≥ 3%, the coiled material can be parallel or perpendicular to the roof ridge. If two or more layers of membranes form a composite waterproof layer, the upper and lower layers must not be laid perpendicular to each other.

(3) The lap joints of the webs laid in the vertical flow direction must overlap in the direction of the flowing water, and the webs laid in the direction of the parallel flow, if there is no rigid protective layer, the lap joints should be consistent with the annual maximum wind direction.

(4) The width of the long and short edges of the coil is 80mm.

(5) The lap joints of the short sides of two adjacent webs should be staggered by more than 300 mm.

(6) The lap joints of the coil should be not less than 300mm away from the yin and yang angles, and the position of the gutter should be avoided.

3、Additional reinforcement layer construction for nodes (angle of yin and yang, water falling out, out of the roof pipeline, equipment foundation and embedded parts on the roof, etc.)

4. Construction of Additional Reinforcement Layers at Yin-Yang Angle

(1) The 1m wide web is cut to an average of 1/3 width, and the center-to-center shop is attached to the yin and yang corners as an additional reinforcing layer web.

(2) press the ink line trial positioning.

(3) Heat the coil melt with a short spray gun and apply a suitable pressure with a roller or a cotton swab to wipe off the edge of the coil immediately after the melt.

5. Construction of water-proof layer of water fall nozzle (such as the drawing).

(1) After installation of the downspout, use UGM non-shrinkage high-strength grouting material (or micro-expanded stone grouting material) to block the reserved holes twice. Before the next blockage, place BW along the wall and hole wall in the middle of the board. Water strips.

(2) When the screed layer is under construction, a 20-mm wide groove is reserved along the circumference of the nozzle and it is full. Embedded polymer modified asphalt waterproof grease

(3) Waterproof layer Coiled to 250mm around the pipe, and then use a polymer modified bitumen waterproof coating to form a film with a thickness of 4mm around the mouth of the pipe and lap joint with the coil 300mm.

(4) During the construction of the protective layer, a 20-mm wide groove is reserved around the nozzle, and a polymer-modified bitumen-based waterproof ointment is filled in the reserved groove.

6, out of the roof pipe node waterproof layer construction

(1) When the screed layer is in construction, a 20mm groove is reserved along the periphery of the pipeline, and a polymer modified bitumen waterproof ointment is embedded.

(2) Waterproof layer Coiled to 250mm around the pipe.

(3) Brushing the outer wall of the pipe with a polymer cement-based composite waterproof coating is not less than 250mm high and 1.3-1.4mm thick, and is overlapped with the waterproof layer coil, and the lap width is 300mm.

(4) The polymer cement-based composite waterproof coating is covered with a protective layer of cement mortar and sealed with a polymer-modified asphalt waterproof ointment at the head of the waterproof layer and the protective layer.

What are the waterproof membrane

1, asphalt waterproof sheet

Asphalt is the oldest and most widely used waterproof material, and we often see the various licenses of Anhui licenses on the street as the trapping tricycle. The asphalt is dip-coated on the carcass material, such as base paper and fiber felt, and turned into a waterproof membrane that can be curled. In fact, even if the asbestos cloth is not used as the carcass, the rubber powder is doped into the bituminous material, and after the pressing, the bituminous waterproofing membrane can be made. Compared with traditional asphalt, the use of more convenient and environmentally friendly.

2, high polymer modified asphalt membrane

However, asphalt itself also has many disadvantages, such as low-temperature brittleness, high temperature flow resistance, poor aging properties, and there have been many modified asphalt membranes, such as SB asphalt membranes. It incorporates SBS rubber in the asphalt, which has taken a step forward in terms of ductility and toughness, as well as oxidation modified asphalt incorporating polyethylene. Bituminous coils generally use hot construction methods, which will be mentioned later.

3, synthetic polymer waterproofing membrane

Synthetic polymer waterproofing membranes are based on synthetic rubber, synthetic resin or a blend of the two, with appropriate amounts of chemical additives and fillers added. After being kneaded, rolled or extruded, it can be curled sheet-like waterproof material. Compared to traditional asphalt membranes, it is more environmentally friendly, has no pungent odor, and is more excellent in terms of aging resistance, extensibility, and low temperature resistance, and can be cold-worked in cold construction.

Editor's summary: The waterproof construction technology for coiled materials was introduced here, and we hope to help everyone. If you want to know more related information, you can pay attention to this website information.

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