Inorganic Cement Prefabricated House
An inorganic cement prefabricated house is a type of dwelling where wall panels, floor slabs, and other components are prefabricated in a factory and then transported to the site for assembly. It offers advantages such as affordability, rapid construction, and environmental friendliness, but also has drawbacks including poor earthquake resistance, inadequate sound and thermal insulation, and susceptibility to water leakage.
Advantages:
Affordability is a significant advantage, with a price of approximately 300 yuan per square meter. A two-story small house can be built for around a hundred thousand yuan, saving half the cost compared to traditional brick houses. Prices vary slightly among manufacturers; for example, Jianwei Manufacturing in Baoding, Hebei, offers cement mobile homes at 300 yuan per square meter, while Haiyu Components in Weifang, Shandong, provides cement prefabricated houses at 280 yuan per square meter. Construction speed is extremely fast, with a single module taking only 7 days to produce in the factory, with an error margin controlled within 2 millimeters. During on-site hoisting, a 50-ton crane combined with an intelligent positioning system can complete the main installation of a single villa in 4 hours. A 100㎡ house can go from an empty lot to being ready for occupancy in just 5 days. In a construction site in Qixian, Henan, the main installation of a 200㎡ three-story villa was completed in 4 hours. Environmental performance is outstanding, with a 100㎡ house generating 98% less construction waste than traditional methods, amounting to only 0.5 tons per building.
Disadvantages:
Earthquake resistance is poor, making it unsuitable for earthquake-prone areas. Many houses that collapsed during the Wenchuan earthquake were of this type. Sound and thermal insulation are inadequate, resulting in stuffiness in summer and coldness in winter, with sneezes from the next room being clearly audible. The prefabricated panels are about 10 centimeters thick, with elongated circular holes in the middle, making the structure prone to sound transmission. Additionally, gaps exist at the joints, weakening thermal insulation. The susceptibility to water leakage is prominent, with long-term leakage at the joints leading to steel reinforcement corrosion and shortening the house's lifespan.
Technical Characteristics:
The structure adopts a full-frame shear wall design, such as C35 concrete with Φ14 threaded steel bars, achieving a reinforcement ratio of 1.2% per single module. The wall thickness is 200mm, with a compressive strength of 30MPa, allowing it to withstand 3000 tons per square meter. The connection method combines prestressed bolts (with a tensile strength of 25 tons) with mortise-and-tenon joints inspired by ancient architecture. In Wenchuan earthquake simulation tests, the overall displacement was only 3cm under a 9-degree intensity shake. In terms of intelligent integrated systems, the walls are embedded with EPS insulation layers (with a thermal conductivity of 0.03W/(m・K)), saving 50% on heating costs in winter. The roof is pre-fitted with photovoltaic panel interfaces, enabling a 200㎡ house to generate up to 3000 kWh of electricity annually, meeting household electricity needs.
Suitable Scenarios:
It is suitable for areas with tight budgets and outside earthquake zones. For long-term residence, cast-in-place or light steel houses are more reliable. If smart home installations or garage construction are required, cement prefabricated houses may not meet the needs.
