Cracks and water leakage may occur in the use of lightweight insulating brick, but these problems can be effectively prevented and solved by the following methods:

I. Measures to prevent cracks

(1) control the quality of materials

Select high-quality lightweight insulating brick to ensure its strength and crack resistance. For example, the lightweight thermal insulation waterproof block developed by the Green Building Materials Research Office of Hainan University has high strength and good crack resistance.

Use low water absorption materials to reduce drying shrinkage cracks caused by moisture change.

(2) Optimization of construction technology

In the process of construction, ensure the close connection between bricks and between bricks and structures. For example, polymer cement mortar or elastic sealing material is used in the splicing of light insulating brick to enhance the integrity.

When installing lightweight insulating brick, avoid slotting or opening holes on both sides of the brick at the same position to prevent stress concentration from causing cracks.

For pipeline installation, reasonable planning should be made to avoid secondary grooving and reduce the damage to the brick body.

(3) surface treatment

The interfacial agent is coated on the surface of light insulating brick to isolate air and reduce hygroscopicity, thus reducing the risk of drying shrinkage cracks.

Use anti-crack covering materials, such as anti-crack paper tape, adhesive tape or glued glass fiber mesh cloth, to enhance anti-crack performance.

II. Measures to prevent water leakage

(1) the waterproof performance of the material is improved

Choose a lightweight insulating brick with waterproof function. For example, the composite lightweight waterproof thermal insulation insulating brick enhances its waterproof performance by treating the surface of the thermal insulation layer with an efficient waterproof interfacial agent.

Use thermal insulation materials with low water absorption, such as XPS high-density polystyrene extruded board, to further improve the waterproof effect.

(2) Handling of construction details

When dealing with brick joints, waterproof caulking agent is used to caulk the joints to ensure the waterproof performance of brick joints. For example, in the construction of JQK composite lightweight thermal insulation insulating brick, the brick joints should be treated with polymer waterproof caulking agent, and the joints should be compacted and calendered to ensure waterproof effect.

In roof construction, dry paving method is used to pave the insulation insulating brick, and waterproof ointment is used for caulking in brick joints and frame joints to ensure the overall waterproofing of the roof.

(3) system design optimization

In the roof thermal insulation system, the waterproof layer is placed under the thermal insulation layer to form double waterproof protection. For example, the high-strength thermal insulation and decoration integrated brick system puts the waterproof layer under the thermal insulation layer, which makes the waterproof performance more durable and reliable.

For the building wall, the lightweight thermal insulation waterproof block is used, which has excellent waterproof performance, and the 10 cm thick board can achieve no leakage for 3 months.

Through the above measures, the problems of cracks and water leakage in the use of light insulating brick can be effectively reduced, and its service life and effect can be improved.