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- Brand: Cordek®
- Model: 225mm (Grade 7/10)
- Dimensions: 2,400mm x 1,200mm x 225mm
- SKU: 7/10 max concrete depth 220mm
- Product code: P1-339
- MPN: 225mm HX S 7/10
What is 225mm Cellcore HX S Slab?
225mm Cellcore HX S Under Slab is a lightweight expanded polystyrene (EPS) block designed for use beneath reinforced concrete floor slabs to protect against the potential effects of ground heave.
How to understand the differences between grades?
Grades are specially calculated and calibrated for deformation of EPS under loading.
7/10 grade | 7 means 7 kN/m2 (safe load) | 10 means 10 kN/m2 (failure load)
9/13 grade | 9 means 9 kN/m2 (safe load) | 13 means 13 kN/m2 (failure load)
13/18 grade | 13 means 13 kN/m2 (safe load) | 18 means 18 kN/m2 (failure load)
18/24 grade | 18means 18 kN/m2 (safe load) | 24 means 24 kN/m2 (failure load)
24/32 grade | 24 means 24 kN/m2 (safe load) | 32 means 32 kN/m2 (failure load)
What HX S under slab safe load means?
HX S Safe Load simply means safe force that a HX S material offers without fear of breaking - Normal Working Load (NWL)
7 means 7 kN/m2 (safe load) – kilonewtons per m2
9 means 9 kN/m2 (safe load) – kilonewtons per m2
13 means 13 kN/m2 (safe load) – kilonewtons per m2
18 means 18 kN/m2 (safe load) – kilonewtons per m2
24 means 24 kN/m2 (safe load) – kilonewtons per m2
What HX S under slab failure load means?
It means the load at which the under slab will fail (permanent deformation).
10 means 10 kN/m2 (failure load) – kilonewtons per m2
13 means 13 kN/m2 (failure load) – kilonewtons per m2
18 means 18 kN/m2 (failure load) – kilonewtons per m2
24 means 24 kN/m2 (failure load) – kilonewtons per m2
32 means 32 kN/m2 (failure load) – kilonewtons per m2
Is it complicated is to work with 225mm HX S Under Slab?
NO, is not. One of great things about 225mm HX S Under Slab is its very simple to work with and doesn't have much dust off when cut on site.
What is the 225mm HX S Under Slab shrinkage category?
Shrinkage category of 225mm HX S is classified as HIGH
What is 225mm HX S Under Slab plasticity index?
225mm HX S Under Slab Plasticity index is 40-60.
What is the standard size of 225mm HX S Under Slab?
HX S Under Slab dimensions are:
2,400mm x 1,200mm (8’x4’)
What is the maximum depth of concrete dedicated for 225mm HX S Under Slab?
Grades are specially calculated to withstand the load of concrete as per below:
7/10 - from 0mm up to 220mm concrete thickness
9/13 - from 220mm up to 300mm concrete thickness
13/18 - from 300mm up to 460mm concrete thickness
18/24 - from 460mm up to 660mm concrete thickness
Why knowing Cellcore grades is so important?
Each grade has adequate strength to support a specified depth of wet concrete during construction and will collapse under its specified fail-load, limiting the upward presssures experienced periods od clay heave.
How to install 225mm HX S Under Slab?
The procedure for installing Cellcore panels is straightforward. Cellcore panels should be placed upon a suitable firm and level surface.
Typically a layer of concrete blinding beneath the panels is recommended.
Panels can be easily laid by one person.
How do cut 225mm HX S Under Slab?
Cut can be carried out using a fine tooth saw or hot wire cutter.
How can I joint Cellcore HX S Under Slab boards?
Individual panels should be butted together, with taping of the joints using the formwork tape to avoid any grout loss between the panels.
Formwork sealing tape, typically 50mm wide is used to seal the joints between adjacent panels. Tape should be used to tape the joints to stop the ingress of concrete slurry weeping down between the panels and cousing a dead spot.
Is Cellcore 225mm HX S Under Slab BBA Certified?
Yes, 225mm HX S Under Slab has BBA Certificate.
Do I need Damp Proof Membrane for Cellcore HX S?
Damp proof membrane should be used on top of the slap and underneath the screed.
Can I walk on 225mm HX S Under Slab ?
Yes, 225mm HX S is made of moulded collection cellular legs with 10mm twin fluted polypropylene top which is strong enough to actually walk on during placement of base spaces and reinforcement.
How to recognize grades on HX S boards?
It is very easy. Each grade has own color code.
They are labeled to easily find on site which grade goes in which area.
7/10 grade is colored RED 
9/13 grade is colored BROWN 
13/18 grade is colored YELLOW 
18/24 grade is colored BLACK 
24/32 grade is colored BLUE 
Can I use HX S Under Slab to insulate building?
No, if you are considering insulating your building then you should consider looking at this product which is cell called HX Plus.
