How many bonding mortar does a square meter insulation board need?

One square meter of insulation board needs 4-9 kilograms of bonding mortar. ?

heated board

brief introduction

The popular term insulation board is the board used to keep the building warm. The insulation board is a rigid foam plastic board made of polystyrene resin, other auxiliary materials and polymer, which is heated and mixed, injected with catalyst at the same time, and then extruded. It has moisture-proof and waterproof performance, which can reduce the thickness of building envelope and increase the indoor use area.

Shared species

First, XPS insulation board

XPS insulation board is a rigid foam plastic board made of polystyrene resin as raw material, supplemented by other auxiliary materials and polymers, heated and mixed, then injected with catalyst, and extruded. Its scientific name is extruded polystyrene foam (XPS) for thermal insulation. XPS has a perfect closed-cell honeycomb structure, which makes XPS board have very low water absorption (almost no water absorption), low thermal conductivity, high pressure resistance and aging resistance (almost no aging decomposition phenomenon in normal use).

Second, polyurethane insulation board

1, hard polyurethane board has low thermal conductivity and good thermal performance. When the bulk density of rigid polyurethane is 35 ~ 40kg/m3, the thermal conductivity is only 0.018g ~ 0.023 w/(m k), which is about half of EPS and the lowest among all thermal insulation materials.

2. Hard polyurethane board is moisture-proof and waterproof. The closed-cell ratio of rigid polyurethane is above 90%, which is a hydrophobic material, and the thermal conductivity will not increase due to moisture absorption, and the wall will not leak.

3. Rigid polyurethane is fireproof, flame retardant and high temperature resistant. After adding flame retardant, polyurethane is a kind of flame retardant and self-extinguishing material, its softening point can reach above 250 degrees Celsius, and it will only decompose at higher temperature. In addition, when polyurethane burns, it will form ashes on its foam surface, which will help to isolate the foam below. Can effectively prevent the fire from spreading. Moreover, polyurethane will not produce harmful gas at high temperature.

4. polyurethane board has excellent thermal insulation performance, which can reduce the thickness of building envelope and increase the indoor usable area while meeting the same thermal insulation requirements.

5, the deformation resistance is strong, it is not easy to crack, and the facing is stable and safe.

6. The pore structure of polyurethane material is stable, and it is basically closed-cell structure, which not only has excellent thermal insulation performance, but also has good freeze-thaw resistance and sound absorption performance. Under normal use and maintenance conditions, the average life of rigid foam polyurethane thermal insulation structure can reach more than 30 years. It can be realized that the structure will not be damaged under normal use conditions during the service life, under the influence of external factors such as dryness, humidity or electrochemical corrosion, and under the growth of insects, fungi or algae or the destruction of rodents.

7. The comprehensive cost performance is high. Although the unit price of rigid polyurethane foam is higher than other traditional thermal insulation materials, the increased cost will be offset by the substantial reduction of heating and cooling costs.

building technology

First, install the heat shield.

1) The standard plate size is 300*300, and the diagonal error is less than 3 mm If cutting is needed, it can be cut with a small cutting saw, and the allowable deviation of the insulation board size is 2.

2) Grid cloth turnover: paste grid cloth at the openings of doors and windows and at both sides of deformation joints. The total width is about 200, and the turnover part is 80. The specific method is as follows: the cutting length of the grid cloth is 180 plus the plate thickness. First, apply a special glue with a length of 80 and a width of 2 to the turned-over part of the bag, then press in a grid cloth with a length of 80, and throw away the rest for later use.

3) Apply the prepared special glue on the back of the composite foamed cement board, and the compaction thickness of the glue is about 3. In order to ensure the firm bonding, it is best to use the total immersion method, or the strip bonding method and the strip point method.

4) Strip sticking method: use a toothed trowel to evenly spread the special adhesive on the foamed cement board horizontally, with a strip width of 10, a thickness of 10 and a middle distance of 50.

5) Stripping method: use a trowel to apply special glue around and in the middle of each board, and then apply ash cake with a diameter of 50 and a thickness of 10 to the partition area of the foamed cement board.

6) Use special adhesive to quickly paste the insulation board on the wall to prevent the surface from crusting and losing the bonding effect.

7) After the foamed cement insulation board is attached to the wall, flatten it with 2m feet to ensure its smoothness and firm paste. The board should be squeezed tightly without joints. Gaps caused by non-linear cutting should be plugged and smoothed with adhesive. After each board is pasted, the special glue on the extrusion surface should be removed.

8) Foamed cement slabs shall be laid horizontally in sections from bottom to top, with the length of each row of slabs staggered by12, and the local minimum staggered joint shall not be less than 100.

Second, the installation of fixed parts

1) The fixing device shall be installed within 8 hours after the insulation board is pasted, and shall be completed within 24 hours after the pasting. According to the design requirements, drill a hole with an impact drill, the aperture is 10, the depth of drilling into the foundation wall is about 60, and the depth of anchoring the fasteners into the foundation wall is about 50, so as to ensure firmness and reliability.

2) The number of fixing pieces shall be one for each board.

3) Self-tapping screws should be tightened, and the surface of engineering plastic expansion nail cap and composite foamed cement board should be screwed in neatly or slightly to ensure that the tail of expansion nail rotates and is fully anchored with the foundation wall.

Third, polishing

1) The uneven joints of the insulation board should be polished with coarse sandpaper, and gently circled, not along the direction parallel to the board joints.

2) Clean the floating ash with a brush in time after polishing.

Fourth, as the angle of decorative line.

1) According to the design requirements, use ink lines to pop up the position where the line angle needs to be made, and make horizontal and vertical correction.

2) The notch angle is cut into notches with a slotting machine, and the thinnest part of the notch shall not be less than 15.

3) After the protruding line angle is cut according to the design size, the interface agent should be brushed on both sides of the line angle and the corresponding insulation board, and then special glue should be applied to make it stick firmly.

Five, wipe the bottom polymer mortar

1) The configuration of polymer mortar is the same as that of special binder.

2) Spread the prepared polymer mortar evenly on the board with a thickness of 2mm.

Six, press into the grid cloth

1) The grid cloth should be cut according to the length and width requirements of the working face, and the lap width should be reserved. The cutting of grid cloth should be carried out along the warp and weft directions.

2) Turn over the grid cloth around the openings such as doors and windows, and reinforce the four corners with a layer of grid cloth. The entire grid cloth should be turned around the hole and above the additional grid cloth.

3) Apply polymer mortar to the holes on the front and side of the extruded board and the turnover part of the grid cloth (only polymer mortar can be applied to the end edge of the extruded board here). Turn the pre-cast grid cloth along the thickness of the plate and press it into polymer mortar.

4) Stretch the whole grid cloth horizontally, pay attention to the inner curved edge of the grid cloth, and smooth the grid cloth up and down from the middle with a trowel to make it tight. The horizontal lap width of grid cloth shall not be less than 100, and the vertical lap length shall not be less than 80. Use polymer mortar to supplement the gap of the bottom mortar at the lap joint, and the grid cloth shall not wrinkle, empty drum or warp.

5) At the corner of the concave-convex line, the narrow grid cloth should be buried in the underlying polymer mortar, and the whole grid cloth should be placed on the narrow grid cloth, with a lap width of 80.

6) At the corner of the wall, the grid cloth on both sides of the wall is lapped around the corner in two directions, and the lap width of each side is not less than 200.