Prefabricated Slab House Floor Construction
The construction of floor slabs in prefabricated slab houses primarily involves the production and installation processes of prefabricated slabs, with core steps divided into two stages: production and installation. Modern technology has gradually driven upgrades in construction methods.
Production Process of Prefabricated Slabs
To produce prefabricated slabs, a hollow mold must first be constructed, typically using wooden planks nailed together to form a hollow structure. The mold dimensions must be precisely controlled according to design requirements. Arranging a steel reinforcement skeleton inside the mold is a crucial step; the specifications and spacing of the steel bars must comply with building codes to enhance the load-bearing capacity of the prefabricated slabs. Subsequently, cement concrete is poured into the mold, ensuring that the concrete fully fills the hollow section and is vibrated and compacted to eliminate air bubbles. After the concrete reaches the designed strength (usually requiring curing for 7-14 days), the external wooden formwork is knocked off, resulting in a prefabricated slab with a smooth surface and internal steel reinforcement. This process requires strict control over the concrete mix ratio and curing conditions to avoid quality issues such as insufficient strength or shrinkage cracks.
Key Points for Installation of Prefabricated Slabs
During installation, professional lifting equipment, such as lifting steel beams as composite slab lifting devices, must be used to ensure uniform stress distribution at the lifting points and prevent cracks or distortions in the components due to localized stress concentrations. Before lifting, it is necessary to check whether the prefabricated slab numbers match the installation positions and to clean debris from the base surface. During installation, temporary supports are used to fix the prefabricated slabs, adjusting their levelness and elevation to ensure alignment of the slab joints. Joint treatment requires filling with high-strength mortar or special grouting materials to prevent leakage and structural loosening. Additionally, finished product protection is necessary after installation to avoid damage to the prefabricated slabs from subsequent construction activities.
Upgrades in Modern Construction Methods
With the development of construction technology, traditional prefabricated slab construction is gradually being replaced by cast-in-place concrete and prefabricated buildings. Cast-in-place concrete involves integrated construction through on-site formwork erection, steel bar binding, and concrete pouring, offering strong overall integrity but with a longer construction period. Prefabricated buildings, on the other hand, use factory-prefabricated components (such as composite slabs and hollow slabs) and modular installation to shorten the construction period by more than 30%. Moreover, the quality of the components is controlled by the factory environment, ensuring higher precision. For example, in prefabricated buildings, the joints between prefabricated floor slabs and beam-column connections are made using post-poured concrete, retaining the advantages of prefabrication while enhancing overall structural integrity, making it the current mainstream trend.
Prefabricated slab construction must strictly adhere to specifications, with attention to detail from production to installation. The introduction of modern technology has further improved construction efficiency and building quality.
