Practice has proved that cracks in EPS cement sandwich panels can be prevented by strictly checking product quality, improving unreasonable construction technology and doing well maintenance of later wall board.This is a prerequisite for the manufacture of prefabricated houses, allowing you to have a safer life.
1.Reduce dry shrinkage of EPS cement sandwich panels. In the production of wallboard, the manufacturer is required to guarantee the maintenance period of wallboard to reach 28 days according to the specifications. Secondly, after 28 days of maintenance, the wallboard is dried and the moisture content is controlled within 5%. After checking the actual data, the drying shrinkage of the drying wallboard is less than 0.4 mm/m, and the drying shrinkage of the wallboard before drying is about 0.8 mm/m.
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2.In view of the characteristics of EPS cement sandwich panels cracks mainly occurring around the joints of slabs and slabs, columns, beams and doors and windows, technical analysis shows that the main reason is that the gap between slabs and slabs, between slabs and columns, and between beams is caused by the insufficient mortar at the joints and the poor bonding between mortar and wall slabs. It is not enough to produce cracks when stress is greater than bond strength.
To prevent cracks in EPS cement sandwich panels, it is crucial to implement proper construction techniques and maintenance practices. Here are some key strategies for crack prevention:
Quality Materials:
Ensure the use of high-quality materials in the manufacturing of EPS cement sandwich panels. This includes selecting top-grade cement, quality Expanded Polystyrene (EPS) insulation, and appropriate additives to enhance the panel's durability.
Proper Mixing and Installation:
Follow manufacturer guidelines for mixing and installation. Adhere to recommended ratios and procedures to guarantee the uniform distribution of materials, preventing weak points that may lead to cracks.
Structural Design Considerations:
Design the structure with proper load-bearing capabilities to avoid undue stress on the panels. This includes accounting for factors such as wind load, thermal expansion, and settlement.
Expansion Joints:
Incorporate expansion joints in the construction design. These joints accommodate the natural expansion and contraction of materials due to temperature changes, reducing the likelihood of cracks.
Reinforcement Techniques:
Depending on the application, consider reinforcing the panels with additional materials or structures. This reinforcement can enhance the overall strength and resilience of the panels against cracking.
Professional Installation:
Hire experienced professionals for the installation of EPS cement sandwich panels. Proper installation ensures that panels are securely placed and minimizes the risk of structural issues leading to cracks.
Weather Protection:
Shield panels from harsh weather conditions during and after installation. Exposure to extreme temperatures and moisture can compromise the integrity of the panels, making them more susceptible to cracking.
Regular Inspection and Maintenance:
Conduct regular inspections to identify any signs of wear, stress, or potential issues. Promptly address and repair any damage to prevent further deterioration.
Sealant Application:
Apply appropriate sealants to vulnerable areas, especially joints and edges, to enhance water resistance and protect against moisture infiltration, a common cause of cracks.
By adopting these preventive measures, the risk of cracks in EPS cement sandwich panels can be significantly minimized, ensuring the longevity and performance of the construction material.