Images Highlighting the Disadvantages of Cement Prefabricated Houses

Cement prefabricated houses have multiple drawbacks. Although images cannot be directly provided, the following is a detailed description of these disadvantages:

Poor Seismic Performance: The construction process of prefabricated panel buildings is relatively simple. They are mostly assembled from cement components and lack effective reinforcement with steel bars, resulting in poor overall integrity. During an earthquake, they are unable to withstand the powerful impact forces generated, making them prone to sudden collapse. For example, in the Wenchuan earthquake, almost all prefabricated panel buildings in the disaster area were affected, causing severe casualties and property damage.

Prone to Water Seepage: The building components of prefabricated panel buildings are mainly poured from cement and lack reinforcement with steel bars. Over time, these components are prone to cracking. Additionally, the gaps at the joints between components are relatively large. Once water leakage occurs, seepage to the lower floors is almost inevitable, causing damage to the interior decoration and living environment of the house.

Poor Sound Insulation and Thermal Insulation: The walls of prefabricated panel houses are usually thin and unable to effectively block external noise and temperature. In summer, the interior becomes unbearably hot, while in winter, it becomes extremely cold, greatly affecting the comfort of living.

Difficult to Modify the Structure: Prefabricated panels are built one by one, and most of the interior walls serve load-bearing functions. The floor plan designs of houses built in the early days differ significantly from current popular standards. During renovation, since load-bearing walls cannot be removed, it is basically impossible to change the structure of the house. Moreover, the floor plan designs are often not user-friendly, such as kitchens or bathrooms that may lack windows.

Short Service Life: Most prefabricated panel houses were built in the 1970s and 1980s, with a typical service life of only 30 - 40 years. Nowadays, many prefabricated panel houses have exceeded their service life, with the main structure showing signs of aging and unable to meet the living requirements of modern people.

Weak Connection Points: There is only simple overlapping between prefabricated panels and walls, and the gaps between panels are simply filled without the installation of ring beams or structural columns. The entire house lacks a rigid framework. When foundation settlement or wall cracking occurs, the panels may become misaligned and loose. Over time, the connection points are prone to weathering, steel bar rusting, and a decrease in strength.

Substandard Materials: Regular prefabricated panels use relatively thin steel bars, but some small workshops, in order to make more profit, use thin steel wires instead of steel bars. At the same time, the concrete grade does not meet the standards and the thickness is insufficient, resulting in high brittleness and easy fracture of the prefabricated panels. When overloaded, they may break instantly without any warning.