Characteristics & benefits

  Excellent Lower Surface Finish
The Lower surface of element is smooth having been casting bed. Generally this surface can be left as seen or be simply painted. In residential applications only final smoothing is required greatly reducing costs.
  Quick and Easy Installation
With only 7-8 workers it is possible to install more than 500-600m2 600sq.mtrs.of floor per day.
  Completely Self- Supporting
For all loads and spans there is no need for supports during installations. It is possible to load the floor immediately after installation, even without any in-situ concrete casting.
  Easy Project Implementation
Hollow Core Slabs have a wide range of applications; they can be installed up-to 15m long and are very common in the traditional building sector, in pre-fabricated building construction and also in seismic zones. For this specific purpose the floor elements can be connected to each other using steel reinforcement during construction in order to create floor continuity even without the concrete topping. This gives the floor the correct static characteristics required for seismic zones. Through the design of the lower part of the element, floors can be produced with high fire resistance from 60 to 180 minutes. It is possible to manufacture elements with end opening which are then filled on-site in an orthogonal direction to the floor to obtain resistant ribs creating solid ends to increase capacity.
  High Element Rigidity
The Hollow Core Slabs have minimal deformation due to transversal load distribution even with high slenderness ratio or without any concrete topping. The produced elements have high load resistances thanks to a low water/cement ratio of concrete from 0.32 to 0.38. In fact to produce the same profiles using traditional methods would require higher water/cement ratios and need expensive formworks.
  Large Cost Saving
Large production volumes with uniform cross sections even with different cable reinforcement configurations. Once the concrete elements have been produced they can be removed from casting beds after just 6-8 hours. The use of high tensile strength pre-stressed strands, wires or single wire means that the pre-stressed elements have lower reaction sections using concrete more efficiently and thus achieving elements of high quality. Reduced sections mean lower weight, so lower transport and construction costs and allow trouble free handling and storage in the stock yard.
  Assured Quality
This is achieved by using specific equipment for manufactured of the concrete elements combined with a high end quality control system.
  Production Flexibility
The dimensions of the concrete elements and the pre-stressed steel wire configuration can be changed according to the element technical specifications required . It is quick simple operation to change the necessary parts of the forming inserts of the casting machine to vary the eight and thickness of the concrete elements. For the most demanding applications or in cases where high elements are required, the lower part of the element and vertical ribs are reinforced with steel mesh and connection bars.
  Minimum Element Height with Load Capacity
The presence of voids means a reduction is slab weight. This results in a lighter floor with a solid/void part ratio of less
than 0.6
  High Durability and Load Resistance
The presence of voids means a reduction is slab weight. This results in a lighter floor with a solid/void part ratio of less than 0.6. High Durability and Load Resistance. The Slip former technologies produce elements with guaranteed fire resistance which are further enhanced by the ability of the machines to work a concrete mix with low water/cement ratio. The Quality of the casting machines ensures a high compaction level and impermeability combined with high mechanical resistance.
  PCI has three different certification programs
1. Plant Certification – First introduced in 1967, covers the overall management of the quality system within
    precast/pre-stressed plants.
2. Personnel Training and Certification – First introduced in 1985, covers the qualification and certifications of
    the people doing the product inspections and managing the Quality Assurance departments within
    precast/pre-stressed plants.
3. Erectors Qualification/Certification – First introduced in 1999, covers the training and qualification of field services
    personnel.
4. For more information on the PCI Certification program, refer to PCI Manuals for Quality Control – MNL116 or 117
    that can be found on the PCI website at www.pci.org.

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