Dingzhou Prefabricated Concrete Slabs for Buildings
Dingzhou prefabricated concrete slabs for buildings are concrete prefabricated components produced by prefabricated component factories in the Dingzhou area for construction projects. They have characteristics such as uniform shape and stable structural performance. However, they are currently less used in building construction and are more commonly employed in specific scenarios.
Production Process and Characteristics: Dingzhou prefabricated slabs are manufactured through a systematic process. In terms of materials, they mainly use cement-based materials. During cement hydration, a gel is formed that encapsulates the aggregates and hardens. The particle size gradation of the aggregates affects the density, compressive strength, and durability. During the molding stage, the precision of the steel molds determines the dimensional accuracy of the components, and a smooth inner surface reduces demolding resistance. After concrete pouring, vibration compaction is used to remove air bubbles, and admixtures can adjust the flow characteristics or setting time. The curing stage is crucial. Steam curing accelerates early strength development by raising the temperature, and the curing period is set according to the component specifications and cement type. After demolding, quality inspections are required, including dimensional deviation measurements, strength tests (pressure tests on sample test blocks), and appearance inspections (for defects such as cracks and holes). Qualified components are marked with the production date and model specifications.
Dimensions and Specifications: For residential prefabricated slabs, the maximum span is 4.2 meters (custom-made for longer spans). The widths are mainly 500mm and 600mm, with common thicknesses of 120mm and 150mm. The lengths follow a 300mm modulus (e.g., 3000mm, 3300mm, etc.), with special specifications such as 3800mm and 4000mm also available. The maximum length for ordinary slabs is 4200mm.
Classification and Uses: Prefabricated slabs are divided into solid and hollow types. Hollow slabs reduce weight and save costs through their hollow design, but they are no longer recommended for building structures (as cast-in-place structures offer better integrity and strength). For hollow slabs (YKB), the slab ends require plugs. The regulations for slab joints are as follows: joints less than 30mm are unqualified, those between 30mm and 50mm are qualified, those between 50mm and 110mm require reinforcement, and those greater than 110mm but less than 500mm can have additional slabs added or be made into slab strips. Prefabricated slabs were once widely used for floor slabs, ditch covers, and roof insulation layers. Nowadays, building construction mostly adopts frame structures and reinforced concrete structures, and prefabricated slabs are more commonly used in specific scenarios.
Price Information: Prices vary significantly across different regions and manufacturers. For example, custom anti-folding composite slabs in Diqing, Yunnan, cost 28.00 yuan per square meter, round-hole prestressed floor slabs in Jining, Shandong, cost 20.00 yuan per meter, and plain concrete prefabricated slabs in Taiyuan, Shanxi, cost 12.00 yuan per square meter. For prices in Dingzhou, it is necessary to consult local manufacturers specifically.
