How To Avoid The Most Common Problem Of Hollowing in The Construction Of Terrazzo Prefabricated Panels?

The problem of "hollowing" in the construction of terrazzo prefabricated panels can be effectively avoided through the following five measures: grassroots treatment, material selection, construction technology, environmental control, and maintenance management:

1, Grassroots treatment: Ensure that the grassroots is flat, clean, and moist
Cleaning the base layer: Thoroughly remove dust, oil stains, loose particles, and other impurities from the surface of the base layer to ensure that it is clean and free of floating dust. If there are unevenness or roughness on the surface of the base layer, it should be chiseled or leveled with cement mortar to ensure that the flatness error of the base layer is within the allowable range.
Wet base layer: After the base layer treatment is completed, it needs to be moistened with water, but there should be no visible water. Moistening the base layer can enhance the adhesion between the base layer and the terrazzo prefabricated board, reducing the risk of hollowing.
Moisture proof treatment: When construction is carried out in a humid environment, the base layer needs to be treated with moisture proof measures, such as applying waterproof coating or laying a moisture-proof layer, to prevent moisture from penetrating and causing hollowing.
2, Material selection: Select high-quality materials to ensure material quality
Terrazzo prefabricated panels: Select qualified terrazzo prefabricated panels with uniform thickness and minimal deformation, and avoid using materials of poor quality. High quality terrazzo prefabricated panels have higher strength and uniformity, which can reduce hollowing caused by material deformation.
Bonding material: Use high-quality cement mortar or specialized adhesive as the bonding material to ensure the strength and bonding strength of the bonding material. The proportion of bonding materials should be strictly in accordance with the design requirements to avoid excessive shrinkage and deformation of mortar caused by high sand content or insufficient cement dosage.
3, Construction process: Strictly control the construction process to ensure construction quality
Trial laying adjustment: Before formal laying, conduct a trial laying adjustment to ensure that the gaps between the panels are uniform and the height difference meets the requirements. Trial paving can promptly detect and adjust any unevenness between the panels, avoiding hollowing caused by height differences.
Adhesive fixation: When pasting terrazzo prefabricated panels, appropriate mortar or glue should be used, and the levelness and verticality of the terrazzo prefabricated panels should be maintained. When pasting, the bonding material should be evenly applied to ensure full contact between the bonding material and the base layer and the terrazzo prefabricated board. When fixing, steel plates, bolts and other materials can be used for reinforcement to ensure construction quality and stability.
Reserve shrinkage joints: During the laying process, sufficient shrinkage joints should be reserved to prevent hollowing caused by shrinkage. The width and spacing of the shrinkage joint should be set according to the design requirements to ensure that there is sufficient space for deformation of the terrazzo prefabricated panel during the shrinkage process.

4, Environmental control: Pay attention to the construction environment and avoid adverse factors affecting it
Temperature control: Avoid working in environments with low temperatures or high humidity. Low temperature can affect the setting and bonding strength of cement mortar, while high humidity may cause water infiltration and hollowing. Construction under suitable temperature and humidity conditions can ensure the normal setting and bonding of cement mortar.
Avoid disturbance: During a period of time after the laying is completed, avoid walking, transporting items, or engaging in other activities on the ground to avoid affecting the bonding effect. After construction is completed, warning signs or fences should be set up to prevent personnel or objects from disturbing the ground.
5, Maintenance management: Strengthen maintenance management to ensure construction quality
Watering and maintenance: After the laying is completed, appropriate watering and maintenance should be carried out. Watering and curing should be carried out within 24-48 hours after laying to maintain the humidity and temperature of the cement mortar and avoid hollowing caused by premature drying. The frequency and amount of watering and maintenance should be adjusted according to the environmental temperature and humidity to ensure that the cement mortar is fully set and hardened.

Avoid heavy object pressure: During maintenance, avoid placing heavy objects on the ground or engaging in other activities that may cause pressure on the ground. The compression of heavy objects may cause deformation or hollowing of the ground, affecting the quality of construction.
Regular inspection: During the maintenance period, the bonding of the ground should be checked regularly to promptly detect and address any hollowing issues. For the discovered hollow drum problem, timely repair and treatment should be carried out to prevent the problem from expanding and affecting the overall construction quality.