How to Make Prefabricated House Slabs

The production of prefabricated house slabs mainly includes steps such as mold making and reinforcement, release agent spraying, steel bar erection, steel bar processing, concrete processing and pouring, curing, and shaping.

Mold Making and Reinforcement: When making prefabricated slabs, first, use steel or wooden plates to nail a hollow mold. Place the side steel formwork at the preset points for reinforcement, then lift the transverse steel formwork together, and operate the pneumatic wrench to tighten all the nuts around to ensure the stability of the mold, providing a reliable foundation for subsequent construction.

Release Agent Spraying: After the mold is reinforced, start spraying the release agent. The role of the release agent is crucial. It can prevent the concrete from adhering to the mold, making the subsequent mold removal process easier and ensuring the surface quality of the prefabricated slabs.

Steel Bar Erection: This step is key to enhancing the strength of the prefabricated slabs. First, bring in the key component, distribution bars. Distribution bars are stirrup structures made of steel bars, mainly aimed at improving the crack resistance and overall compressive strength of the concrete. Workers lift the steel strands and thread them through from one end to the other. Steel strands are collectively referred to as tension bars. The combination of tension bars and distribution bars makes the prefabricated components more sturdy. At the same time, install anchor pieces one by one and place the pouring steel formwork. The function of the anchor pieces is to create a hollow effect, and they will be removed during later mold removal.

Steel Bar Processing: According to different process requirements, use the pre-tensioning method or post-tensioning method to process the steel bars. When using the pre-tensioning method, a machine similar to a hydraulic cylinder is used to apply pressure to make the machine contract, and the steel strands inside become straighter. There is also the post-tensioning method, which is the opposite of the pre-tensioning process, involving pouring first and then stretching the steel bars. To make the steel bars more centered, workers also need to install small plastic blocks at the bottom.

Concrete Processing and Pouring: In the control room, sand, gravel, and water are automatically processed by machines to prepare concrete that meets the requirements. Then, workers operate the equipment to automatically transport the concrete forward and pour it into the mold. First, pour the bottom layer of concrete, that is, the base layer, to ensure uniform distribution of the concrete.

Curing and Shaping: After the concrete is cured and shaped, if a steel plate is used to make the mold, it can be directly transported to the construction site for installation; if a wooden plate is used to nail a hollow mold, knock off the wooden plate after it dries, and what remains is the prefabricated slab.