Prefabricated Blocks for House Construction

Prefabricated blocks for house construction are a core component of modular or prefabricated buildings. They are manufactured in factories through standardized production and then assembled on-site, offering advantages such as shortened construction periods, improved quality, and environmental protection and energy conservation.

Definition and Production Methods

Prefabricated blocks break down buildings into independent modules (such as beams, slabs, walls, columns, and water and electricity pipelines), which are manufactured in factories through industrial production lines. For example, reinforced concrete prefabricated components use double-layer concrete slabs connected with welded wire mesh to form lightweight yet sturdy structures. The Shenzhen affordable housing project used 6,028 concrete modules to achieve rapid assembly through standardized design. Each prefabricated component comes with an 'ID card' indicating project information to ensure traceability of production.

Technical Advantages

1. Shortened Construction Period: Parallel operations and automated production in factories reduce the construction period by 50%-60% compared to traditional buildings. The Shenzhen affordable housing project compressed the completion time from 2.5-3 years to 1 year. Box-type prefabricated technology combines prefabricated functional units (such as bathrooms and kitchens), increasing construction speed by 50%-70%.
2. Quality Control: Module production controls errors with millimeter-level precision, reducing quality issues caused by human factors. For example, prefabricated wall panels are formed using high-precision molds to ensure structural stability.
3. Environmental Protection and Energy Conservation: On-site wet operations are reduced by approximately 80%, significantly decreasing construction waste, noise, and dust pollution. The Beijing Haidian District Dinghui Temple North Plot affordable rental housing project adopted this technology, alleviating traffic congestion in the surrounding area.

Application Scenarios

1. Residential Sector: Affordable housing projects widely apply this technology, such as concrete modular technology cases in Shenzhen and Beijing, balancing efficiency and cost.
2. Public Buildings: Schools, hospitals, and other scenarios use box-type prefabricated technology to quickly build functional units, meeting urgent needs.
3. Overseas Export: China's prefabricated housing technology is mature. In the first four months of 2026, Guangzhou Customs saw a 38.1% year-on-year increase in the export of movable houses, primarily to Southeast Asian and Middle Eastern markets.

Technical Classifications and Challenges

1. Panel-type Prefabrication: Focusing on prefabricated wall panels and floor slabs, this method has limited design flexibility and is suitable for standardized residential buildings.
2. Box-type Prefabrication: This method requires high-standard transportation and lifting equipment, resulting in higher costs, but is suitable for public buildings with complex functions.
3. Reinforced Concrete Prefabricated Components: On-site assembly requires the cooperation of light cranes. After filling with concrete, they form integral walls with excellent seismic performance.

Development History and Prospects

China's prefabricated concrete technology began in the 1950s. After experiencing policy-driven promotion and market decline, it revived in the 21st century due to environmental protection demands. Companies like Vanke have developed prefabricated shear wall residential structural systems, promoting technology popularization. It is predicted that the global modular building market size will exceed $142.8 billion by 2030. With cost and technological advantages, China is expected to become a major exporter.