How to use SPD water-based foamed polyurea sound insulation insulation board

The SPD water-based foamed polyurea sound insulation insulation board takes full water foam polyurea foam as the core. The system stability is enhanced through composite fiberglass mortar cloth, and is suitable for scenes such as rough houses and finely decorated floor heating. The usage method can be summarized into the following key steps:

1. Preparation before construction

Grassroots processing:

Ensure that the base layer is flat, dry, free of cracks and depressions. If there are defects, it needs to be repaired and leveled in advance.

Clean up dust, oil and other impurities on the surface of the base layer to ensure the bonding effect.

Material inspection:

Check whether the size and specifications of the insulation board meet the design requirements. The diagonal error should be less than 3mm and the allowable dimension deviation is ±2mm.

Confirm that the auxiliary materials such as waterproof tape, vertical sound insulation sheet, wire mesh, etc. are of qualified quality and are not damaged.

Environmental requirements:

The construction ambient temperature should not be lower than 5℃ to ensure stable material performance.

Avoid construction in severe weather such as rainy days and strong winds to prevent moisture from invading and affecting the bonding effect.

2. Installation of insulation board

Positioning line:

According to the design requirements, the insulation board installation position line is popped up on the base layer to ensure that the installation is neat and beautiful.

Paste the insulation board:

The insulation board is pasted on the base layer using a special adhesive (such as full-staining method, strip sticking method or strip dot method), and the adhesive compaction thickness is about 3mm.

The insulation board should be laid flat and tightly, and the boards should be squeezed tightly, and there should be no joints. Because the gaps formed by not cutting straight, they need to be stuffed with adhesive and smoothed.

After each piece of the board is glued, the special adhesive for the extruded surface should be removed to keep the surface clean.

Seam handling:

Apply waterproof tape to the joints of the insulation board. The width of the tape on both sides of the seam should be the same (at least 4.8cm wide, equal on both sides, at least 2.4cm wide each).

When bonding, extrude the bubbles in the tape and smooth the tape. If it cannot be smoothed, you can paste the tape on the outside to strengthen the seal and prevent the cement slurry from leaking.

3. System enhancement and protection

Wire mesh laying:

Lay Φ4@100 wire mesh on the insulation board, and the wire mesh should be clean and without damage.

When laying, pad the pads below it to ensure that the wire mesh is about 10 to 15mm away from the top surface of the protective layer.

The overlapping of the wire mesh is tied with fine wire, and the overlapping width is ≥100mm. When tying, pay attention to the wire head facing upward to avoid puncture of the insulation sound insulation board and waterproof tape.

The wire mesh should be broken at the expansion joint to adapt to structural deformation.

Vertical sound insulation film installation:

The wall is continuously covered with sticky vertical sound insulation sheets at the foot of the wall, and the width of the joint should not be >1mm.

The vertical sound insulation sheet should be at least 10mm higher than the upper surface of the fine stone concrete surface layer (the heightened part should be cut off after the curing is completed) to prevent the cement slurry from leaking downward when the concrete vibrates.

Expansion joint settings:

When the local area is >30㎡ or the side length is >6m or the indoor door opening, expansion joints should be installed on the surface of the fine stone concrete.

The width of the expansion joint should not be <8mm and the depth should be controlled between 15 and 25mm to adapt to the thermal expansion, cooling and settlement deformation of the structure.

4. Construction of concrete protective layer

Concrete pouring:

Pour a protective layer of fine stone concrete on the insulation board, with a thickness of no less than 40mm.

When pouring, wooden boards should be laid to prevent the trolley from damaging the board. The wire mesh needs to be lifted to the upper and middle parts of the concrete layer and compacted with a flat vibrator to ensure the compactness and strength of the concrete layer.

When pouring concrete at the corners of the wall and at the floor pipes, be careful not to enter the vertical sound insulation sheet and the wall.

Surface treatment:

After vibrating and compacting the concrete protective layer with a flat vibrator, scrape it back and forth three times to ensure the surface is flat.

Use concrete to level the low-lying areas, and use an iron trowel to calender after the concrete is slightly harvested for 2 to 3 hours. The calendering process must be completed before the concrete is finalized.

5. Maintenance and finished product protection

Maintenance:

After calendering, cover the earthen cloth and sprinkle water for maintenance. The covering is required to be moist. Generally, the maintenance is 10 to 15 days, and water should be sprinkled 3 to 4 times a day.

When the average daily temperature is lower than 5℃, watering and maintenance are not allowed. Only when the compressive strength of the surface protective layer reaches 5MPa can you leave.

Finished product protection:

During the maintenance period, it is strictly forbidden to accumulate materials and large-scale construction equipment on the insulation panel surface to prevent damage to the insulation layer.

Heavy objects must not be stacked or carried within 15 days of winter to avoid affecting the insulation effect.