Prefabricated House Pouring

Prefabricated house pouring involves the pouring of prefabricated concrete components and a combination of prefabricated and cast-in-place solutions. The specific key points are as follows:

Pouring of Prefabricated Concrete Components

1. Pre-pouring Preparation

   • Mold and Formwork Inspection: Thoroughly clean any residual concrete fragments and hardened laitance inside the mold, paying special attention to dead zones such as joints and corners. Check the tightness of the joints; if the gap exceeds 1 millimeter, apply sponge strips or sealant, and ensure that the fixing bolts are tightened. Apply a release agent evenly, avoiding missed or excessive applications, and use a dry cotton cloth to wipe off any excess release agent near the reinforcement.
   • Reinforcement and Embedded Parts Inspection: Reinforcement and embedded parts should be placed in the mold in advance. Before pouring, recheck their positions and whether the reinforcement cage and the thickness of the protective layer meet the design requirements.

2. Pouring Process and Curing

   • The reference information does not explicitly mention details about pouring process control and curing. However, it is generally necessary to ensure that the concrete is vibrated densely to avoid segregation and layering. After pouring, cover it for moisture retention curing (such as covering with plastic film or sprinkling water). The curing time should be determined based on the concrete strength grade and environmental conditions, generally not less than 7 days.

Combination of Prefabricated and Cast-in-Place Solutions

1. Selection of Prefabricated Panels

   • Type: Preferentially select "prestressed hollow panels" with a central circular hole, which have strong load-bearing capacity and are lightweight, facilitating easy handling and installation. Avoid using solid panels (which are prone to cracking and are heavy).
   • Grade: It is essential to choose products marked as "national standard qualified products" and be vigilant about the quality hazards of non-standard panels.
   • Appearance: Check for cracks, chipped corners, and whether the concrete at both ends is dense to ensure structural integrity.

2. Cast-in-Place Strip Construction

   • Position: The cast-in-place strip should be placed directly above the load-bearing wall and cover all joints of the prefabricated panels, with a general width of 15-20 centimeters to enhance overall connectivity.
   • Function: By using a cast-in-place concrete strip, the scattered prefabricated panels are "locked" into a whole, improving the structural seismic resistance and load-bearing capacity.

Price and Supplier References

The prices of prefabricated poured concrete houses vary by region and supplier. For example, the price of a cement wall steel formwork prefabricated house mold (integrally poured and formed) from Anhui Huaibei Zhongzhu Housing Technology Co., Ltd. is 1000 yuan per set; the price of a concrete prefabricated house from Tangshan Fengnan Cijin Cement Products Co., Ltd. in Tangshan, Hebei, is 323 yuan per square meter. The specific choice should be comprehensively evaluated based on project requirements, budget, and supplier qualifications.