What Does a Prefabricated House Slab Look Like

Prefabricated house slabs are cement components prefabricated in factories, with diverse appearances and internal structures, as detailed below:

Appearance and Shape

The size and shape of prefabricated house slabs can be flexibly customized according to construction needs. Common types include regular shapes such as rectangles and circles, and special-shaped components can also be made according to specific design requirements. There are two typical manufacturing processes:

1. Traditional Hollow Slab Process: First, a hollow mold is made using wooden planks. After arranging a steel reinforcement framework inside the mold, the hollow part is filled with cement slurry. Once the cement solidifies, the wooden planks are knocked off, forming a hollow slab structure. Slabs made with this process are usually thinner and are suitable for floors or partition walls with lower load-bearing requirements.
2. Modern Composite Process: A large mold is formed using steel plates. First, a layer of steel reinforcement framework and thin concrete is laid, and then a large foam board (up to 15 centimeters thick) is embedded as a lightweight core material, with its position fixed by iron hooks. Subsequently, a second layer of steel reinforcement framework is laid and steel strands are threaded through, and finally, concrete is poured to cover it. After steam curing, about half of the volume of the finished prefabricated slab is foam core material, significantly reducing its self-weight while maintaining structural strength.

Internal Structure

Prefabricated slabs are divided into two types based on functional requirements: solid and hollow:

1. Hollow Structure: Lightweight is achieved by reducing the concrete in non-load-bearing parts. The internal hollow area reduces material usage while maintaining sufficient load-bearing capacity. The core load-bearing material is cold-drawn wire (high-strength steel wire), which is usually evenly arranged along the length of the slab to form the main load-bearing framework. Some high-end products also embed steel reinforcement frameworks and steel strands, enhancing crack resistance and overall stiffness through prestressing technology.
2. Solid Structure: It is entirely poured with concrete, with evenly distributed steel reinforcement inside, suitable for scenarios with high load-bearing requirements (such as foundation slabs). Although solid slabs are heavier, they offer better impact resistance and durability.

Key Design Logic: The lightweight and load-bearing performance of prefabricated slabs need to be balanced. The hollow structure optimizes the distribution of concrete, concentrating the material in key load-bearing areas (such as the bottom of the slab and around the steel reinforcement), meeting strength requirements while reducing self-weight. The solid structure, on the other hand, achieves higher stability through uniform material distribution. In modern processes, the introduction of foam core materials further pushes the lightweight limits of traditional hollow slabs, while the use of steel strand prestressing technology compensates for the strength loss caused by the core material, reflecting the极致 pursuit (ultimate pursuit) of material efficiency in building industrialization.