Kegu Cement Prefabricated House

Although there is no direct information on 'Kegu Cement Prefabricated House', cement prefabricated houses are characterized by high efficiency and advanced technology, but also have issues such as safety, sound insulation, and water leakage.

Cement prefabricated houses have significant advantages in construction speed. The entire prefabrication process in the factory is mechanized, with a single module production cycle of only 7 days and an error margin controlled within 2 millimeters. During on-site hoisting, a 50-ton crane combined with an intelligent positioning system can complete the installation of the main structure of a single villa in 4 hours, and a 100㎡ house can be ready for occupancy in just 5 days from an empty lot. Compared to traditional house construction, the construction period for a 300㎡ house is shortened from 6 months to 1 day, with an efficiency increase of 180 times; the labor cost for a 100㎡ house is reduced from 60,000 yuan to 24,000 yuan, a decrease of 60%; and construction waste is reduced from 30 tons per house to 0.5 tons per house, a reduction of 98%.

In terms of technology, a full-frame shear wall structure is adopted, using C35 concrete and Φ14 threaded steel bars, with a single module reinforcement ratio of 1.2%. The wall thickness is 200mm, and the compressive strength reaches 30MPa, equivalent to being able to withstand 3000 tons per square meter. Modules are connected through prestressed bolts (with a tensile strength of 25 tons) and mortise-and-tenon joints similar to those in ancient architecture. In a simulated Wenchuan earthquake test, the overall displacement was only 3cm under a 9-degree intensity shake. 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-installed with photovoltaic panel interfaces, and a 200㎡ house can generate up to 3000 kWh of electricity annually, meeting household electricity needs. In a real-world typhoon test in Yangjiang, Guangdong, it withstood a Category 12 typhoon (wind speed of 37m/s), with no脱落 (falling off) of exterior wall tiles and a deformation of less than 1mm in doors and windows.

However, cement prefabricated houses also have some problems. In terms of safety, even a minor earthquake can cause the house to collapse. There are many low-quality prefabricated cement panels with a short service life, and the edges of the prefabricated panels have gaps, making them less safe compared to cast-in-place panels. Regarding sound insulation, there is insufficient quantity of prefabricated panels, and sound has strong penetrating power. The general thickness is around 10 centimeters, with long circular holes in the middle, making the structure like a natural sound transmitter, resulting in poor sound insulation. In terms of water leakage, since the prefabricated panels are composed of panel units, there are gaps between the units. During the rainy season, rainwater can seep in and corrode the steel bars. If the gaps are not properly treated during construction, large cracks can form, affecting the normal life of the homeowners.