Prefabricated Housing Panels

Prefabricated housing panels primarily refer to prefabricated slabs, which were commonly used as floor slabs in early 20th-century construction. These are modules or panels used in engineering projects, produced and processed at prefabrication yards before being directly transported to construction sites for installation.

Production Process

When producing prefabricated slabs, a hollow mold is first made using wooden planks. Reinforcing bars are placed in the hollow part of the mold, which is then filled with cement. After drying, the wooden planks are knocked away to obtain the prefabricated slab. Prefabricated slabs come in two types: solid and hollow. The hollow structure achieves lightweighting by reducing the concrete in non-load-bearing parts. Hollow prefabricated slabs are made because the hollow positions in the slabs do not bear force, and leaving them hollow reduces weight and saves costs.

Architectural Applications

Prefabricated slabs have a wide range of architectural applications, such as cement slabs covering ditches beside highways and cement slabs used as insulation layers on rooftops. Prefabricated slab houses are structures built primarily with prefabricated slabs, a type of construction commonly used for residential buildings in China before 1985.

Existing Issues and Replacement Trends

Existing prefabricated slab houses generally have some issues, such as weak earthquake resistance, poor sound and thermal insulation, and a service life of approximately 30 to 50 years. With the development of construction technology, cast-in-place concrete and prefabricated buildings are gradually replacing traditional prefabricated slab houses. Prefabricated buildings use modular factory-prefabricated components. For example, CMC composite modular buildings enhance earthquake resistance through integrated steel-concrete pouring, reducing construction time by 30% compared to traditional methods.

Policy Orientation

Since 2022, China has implemented a policy of urban renewal, focusing on the renovation and improvement of prefabricated slab houses, with demolition only for buildings that meet the criteria for dangerous structures.

Pricing

The prices of prefabricated floor slabs vary depending on their type, specifications, and manufacturers. For example, the price of a hollow prefabricated floor slab, a concrete load-bearing slab used in housing construction, a concrete prestressed cover slab with round holes, is 36.0 yuan. The price of a reinforced concrete hollow slab, a prefabricated slab used for factory and residential building floors and roofs, a prefabricated hollow cement slab, is 24.0 yuan, among others.