Prefabricated Concrete Reinforced Housing

Prefabricated concrete reinforced housing is an industrialized building form that uses factory-prefabricated core components assembled on-site, offering significant advantages in efficiency, environmental protection, cost-effectiveness, and safety.

Core Processes and Types

Prefabricated concrete reinforced housing involves the use of high-precision molds to prefabricate core components such as walls, floors, beams, and columns in factories. Each module integrates a steel reinforcement framework, insulation layers, waterproofing layers, and pre-embedded pipelines, forming standardized 'building blocks'. The main types include panel-assembled, box-assembled, and frame-assembled structures, with technologies covering prefabricated concrete and steel structures. Components include prefabricated beams, slabs, walls, and columns. For example, using C30-C40 grade concrete and Φ8-Φ12 steel reinforcement mesh, the compressive strength reaches 25-30MPa, 1.5 times that of traditional brick-and-mortar structures. Walls are designed with EPS insulation layer slots, improving thermal insulation by 40%. Modules are connected using prestressed bolts and welded steel plates, achieving a wind resistance rating of Level 10 and a seismic fortification intensity of 7 degrees (equivalent to the destructive force of the Wenchuan earthquake).

Core Advantages

1. Reduced Construction Time: The factory-prefabrication and on-site hoisting model significantly enhances efficiency. A single 30㎡ module can be prefabricated in the factory in just 7 days, and on-site installation by three workers with a crane can complete a single module in 4 hours, with a 100㎡ house taking only 2 days for overall assembly. New box-type structures in Sichuan can even be completed in a single day.
2. Reduced Pollution: Factory production achieves a 95% recycling rate for offcuts, with no dust or sewage emissions on-site and construction waste reduced to just 10% of traditional methods. Environmentally friendly concrete and water-based paints are used, with formaldehyde emissions ≤0.05mg/m³, well below the national standard (0.1mg/m³), enabling 'immediate occupancy' upon completion.
3. Cost Savings: For a 120㎡ rural self-built house, the cost of a traditional brick-and-mortar structure is approximately 180,000-220,000 yuan, while the main module cost of a prefabricated house is only 120,000-150,000 yuan, reducing overall costs by 30%. If a leasing model is chosen, annual rent can be as low as 5,000 yuan per unit, further lowering the barrier to entry.
4. Improved Quality: These houses offer excellent seismic performance, strong integrity, and high durability. Steel reinforcement is encased in concrete to prevent corrosion, and special processes can be used to create corrosion-resistant concrete under erosive conditions. As a poor heat conductor, concrete delays the softening of steel in fires, preventing sudden structural failure.

Development History and Applications

China's prefabricated concrete technology originated in the 1950s, initially applied in factory and residential construction. It experienced a resurgence in the 21st century due to its production efficiency and environmental advantages, with companies like Vanke Group developing prefabricated shear wall residential structural systems. By 2026, Chinese-made prefabricated houses were in high demand overseas. That same year, in the post-earthquake reconstruction of Xiala Su Village, Xiqin Township, Lazi County, Shigatse City, Tibet, 171 new reinforced concrete houses were built with an 8-degree seismic resistance capability, demonstrating the maturity of the technology.