Cement Prefabricated Block House

A cement prefabricated block house is a low-rise building constructed with prefabricated components as its core, produced in factories and assembled on-site. It features modularity, efficiency, and low cost, but has potential issues such as connection safety and water leakage, making it suitable for scenarios like rural self-built houses.

Technical Characteristics

The core components of a cement prefabricated block house (such as walls, floors, and beams) are cast using high-precision molds in factories, integrating steel reinforcement skeletons, insulation layers, waterproof layers, and pre-installed piping to form standardized 'building blocks'. Modules are connected using prestressed bolts, welded steel plates, or integral welding techniques to form an overall frame structure, capable of withstanding seismic intensity up to 7 degrees and wind resistance up to level 10. The materials used include C30-C40 grade concrete with built-in Φ8-Φ12 steel reinforcement mesh, providing 1.5 times the compressive strength of traditional brick-and-mortar structures; walls are designed with EPS insulation layer slots, improving thermal insulation by 40%.

Advantages

1. High Efficiency: A single 30㎡ module can be prefabricated in the factory in just 7 days and installed on-site in 4 hours, with the overall construction of a 100㎡ house taking only 2 days.
2. Low Cost: Taking a 120㎡ rural self-built house as an example, the overall cost is 30% lower than that of a traditional brick-and-mortar structure, with total expenses controllable within 200,000 yuan.
3. Good Environmental Performance: Construction waste is reduced by 90%, and the formaldehyde emission of materials is ≤0.05mg/m³, far below the national standard of 0.1mg/m³, enabling 'immediate occupancy'.
4. High Flexibility: Standard module dimensions are 6m×3m×3m, allowing for free combination of house types through horizontal splicing or vertical stacking (up to 3 floors).

Potential Issues and Limitations

1. Connection Safety: If the connection techniques (such as bolts or welding) are not properly executed, modules may come apart during earthquakes, leading to house collapse.
2. Water Leakage Risk: Gaps between spliced modules are prone to water leakage, which can corrode internal steel reinforcement and affect structural stability over time.
3. Poor Sound Insulation: The thickness of prefabricated panels is usually insufficient (around 10 cm), and they often have long circular holes, resulting in poor sound insulation as noise can easily propagate through the voids.
4. Floor Limitation: As the number of floors increases, the weight borne by lower prefabricated components multiplies, and the probability of water leakage in spliced structures rises, necessitating caution when building high-rise structures.

Application Scenarios

Currently mainly used for low-rise buildings (generally not exceeding 3 floors) such as rural self-built houses, commercial spaces, and cultural tourism projects. For high-rise buildings or structures with high safety requirements, techniques such as cast-in-place concrete should be combined to enhance overall integrity.