Prefabricated House Finished Products - Laminated Panels

The laminated panels in prefabricated house finished products are assembled integral floor slabs formed by the lamination of prefabricated panels and cast-in-place reinforced concrete layers, offering advantages in structural performance and construction efficiency, and are widely used in modern construction.

Structural Composition and Performance Characteristics

Laminated panels consist of both prefabricated and cast-in-place layers. The prefabricated panels serve as both structural components and permanent formwork, with their surfaces treated by roller indentation to enhance adhesion with the cast-in-place layer. The cast-in-place layer can accommodate piping and is formed into a box-shaped cross-section by filling with expanded polystyrene boards, achieving a dual effect of reducing self-weight and improving sound insulation. This structure combines prestressed thin panels with the cast-in-place layer, with the thickness of the cast-in-place layer determined by the span, typically not less than 90mm, and common spans ranging from 4 to 6 meters, suitable for high-rise buildings and large-span structures. Its core advantages include:

1. Strong overall continuity: The prefabricated and cast-in-place layers work together to form an integral load-bearing structure, enhancing floor slab stiffness and seismic performance.
2. Savings in formwork and construction time: The prefabricated panels replace traditional formwork, reducing on-site formwork erection procedures and shortening the construction cycle.
3. Ease of transportation and installation: The lightweight design of the prefabricated panels supports standardized production and mechanized lifting, reducing labor costs.

Manufacturing Process and Construction Requirements

The manufacturing process must strictly adhere to the following steps:

1. Mold fixation: Place the molds on the mold table according to the drawings and secure their shape and position with screws.
2. Reinforcement layout: Place the reinforcement in the width direction of the base plate, steel truss, and additional reinforcement at lifting points, ensuring that the reinforcement spacing and anchorage length comply with design specifications.
3. Concrete pouring: Utilize a numerically controlled布料 robot for precise pouring, reducing the production cycle to as short as 7 minutes and improving efficiency and quality stability.

During the construction phase, attention should be paid to:

• The surface of the prefabricated panels should be clean and moist to avoid affecting adhesion performance;
• The use of early-strength agents that may corrode the reinforcement is prohibited to ensure structural durability;
• The flatness of the prefabricated panels should be checked before pouring the cast-in-place layer to prevent local stress concentration.

Application Cases and Technological Development

Domestic high-performance laminated panels have gained recognition by optimizing thermal insulation performance and reducing construction waste, with projects such as the Beijing Changping Life Valley International Pharmaceutical Smart Manufacturing Park (Phase II) and the Quzhou Beihang Digital Economy Industrial Park adopting this technology. Innovative techniques, such as reserved slot connections, can reduce reinforcement usage and improve installation efficiency. Additionally, the application of intelligent mold-laying robots and numerically controlled布料 robots has promoted the automation and generalization of prefabricated component production, further shortening construction periods and reducing costs.