Cement Prefabricated Slab House Floor

The cement prefabricated slab house floor is a floor structure constructed primarily with prefabricated slabs, featuring a specific construction, historical background, and existing issues.

Construction and Types

Cement prefabricated slabs are factory-made cement components. To produce them, wooden models are first nailed together, steel bars are arranged inside the models, and cement is poured in. After curing and hardening, the slabs are formed. Based on differences in internal structure, prefabricated slabs are divided into two types: solid and hollow:

• Solid prefabricated slabs: These have a uniform cement core inside, with a simple structure and strong load-bearing capacity. However, they are relatively heavy, imposing higher requirements on the overall building load.
• Hollow prefabricated slabs: By creating regularly arranged holes (such as circular or square ones) inside the slabs, the amount of non-load-bearing concrete is reduced, achieving lightweight construction. They are lighter in weight, which can lower building foundation costs, but their sound insulation and thermal insulation performance are relatively weaker.

Historical Background and Applications

Prefabricated slab houses originated in the early 20th century. Initially, due to advantages such as high industrial production efficiency and short construction periods, they were widely used in scenarios like floor slabs and roof insulation layers. In China, residential buildings constructed before 1985 often adopted this structure, especially prevalent in multi-story residential buildings, becoming a typical representative of building industrialization during a specific historical period.

Existing Issues

Currently, prefabricated slab houses generally have the following defects:

• Weak earthquake resistance: Prefabricated slabs are simply connected to the main structure (such as through welding or bolt fixation), resulting in poor integrity. Under earthquake action, they are prone to displacement or detachment, leading to structural damage.
• Poor sound insulation and thermal insulation: The hollow structure or single-layer cement construction has limited ability to block sound and heat, resulting in lower living comfort.
• Limited service life: The design service life of prefabricated slabs is usually 30 - 50 years. Affected by material aging, environmental erosion, and other factors, potential safety hazards may exist after exceeding the service life.

Improvement Suggestions

To address the existing issues, the performance of prefabricated slab houses can be enhanced through the following methods:

• Earthquake reinforcement for old prefabricated slab houses, such as adding structural columns, ring beams, or using carbon fiber cloth reinforcement technology.
• Laying sound insulation and thermal insulation materials (such as extruded polystyrene boards and rubber pads) on the floor surface to improve the living environment.
• Regularly inspecting cracks in the prefabricated slabs and rusting of steel bars, and promptly repairing or replacing damaged components.