Concrete Composite Prefabricated Housing

Concrete composite prefabricated housing generally refers to prefabricated concrete houses, a type of prefabricated assembled building that is produced industrially with concrete components and assembled on-site. The following outlines its technical characteristics, advantages, application scenarios, and development history:

Technical Characteristics

1. Industrial Production: The main structural components of the house (such as beams, slabs, walls, and columns) are pre-cast in factories using standardized molds, steel bar tying, and concrete vibration processes. For example, factories assemble molds with bolt connectors, lay steel mesh and set connectors, and cover them with plastic greenhouses for heat curing after pouring to ensure stable component quality.
2. On-site Assembly: After being transported to the construction site, the components are assembled into an integral structure through bolt connections, welding, or cast-in-place connections. For instance, the Nanjing Jindi Yufang project adopts a prestressed prefabricated concrete assembled integral frame structure system; the Shenzhen “Huazhang Xinzhu” project combines a “concrete module + cast-in-place shear wall” structure, where the modules serve as both spatial units and permanent formwork.
3. Integration Level: Modular construction represents a higher level of integration within prefabricated assembly, with ceilings, floors, and utility pipelines all completed in the factory, requiring only assembly on-site. For example, the Guangdong Shenzhen affordable housing project was assembled from 6,028 concrete modules, reducing the construction period by over 60%.

Advantages

1. Efficiency Improvement: The combination of industrial production and on-site assembly significantly shortens the construction period. For example, a two-story reinforced concrete shell house can be completed in about two weeks; the completion and delivery period for the Shenzhen affordable housing project was reduced from 2.5-3 years to 1 year.
2. Environmental Protection and Energy Efficiency: Factory production reduces on-site wet operations, lowering noise, dust, and construction waste. For example, the Fujian Provincial Industrial Base achieved a reduction in construction waste of over 70%; the Shenzhen project reduced on-site labor by about 50%.
3. Quality Control: Components are produced in factories using high-precision equipment, with errors controlled in millimeters, avoiding quality fluctuations in traditional construction and enhancing the overall durability of the building.

Application Scenarios

1. Residential Construction: Including high-rise residential buildings and emergency affordable housing. For example, Shenzhen’s “Huazhang Xinzhu” is a concrete modular high-rise building; the Guangdong Shenzhen affordable housing project has housed over 2,000 residents.
2. Industrial and Municipal Engineering: Prefabricated concrete modules are used for constructing inspection wells, septic tanks, and other underground structures, characterized by high compressive strength and corrosion resistance.
3. Overseas Exports: China’s prefabricated housing technology is mature and in high demand overseas. For example, in the first four months of 2026, the Guangzhou Customs district exported movable houses worth 1.4 billion yuan, a year-on-year increase of 38.1%.

Development History
The concept of concrete modules dates back to Thomas Edison’s experiments in 1899, with Moshe Safdie’s “Habitat” project in 1967 driving technological advancement. Domestically, the 2001 ban on clay bricks in Beijing spurred research and development, the 2023 release of the “Technical Regulations for Concrete Modular Construction” in Shenzhen, the formulation of technical standards by Guangdong Province in 2025, and the adoption of prefabricated concrete module construction techniques by the Zhangzhou Nuclear Power Unit 4 in 2026, with the first hoisted module weighing 454.289 tons, marking the technology’s extension to large-scale projects.