FloorBlock - Ideal Infill for Beam and Block Aircrete Flooring Systems

Celcon’s new FloorBlock has a face size of 610mm x 350mm (rather than 440mm x 560mm) offering the ability to span widths of 610mm allowing fewer beams to be used in each floor.

Manufactured to a compressive strength of 3.5N/mm2, the new FloorBlock is produced using the very latest aircrete manufacturing technology at our plant in Pollington.

The blocks are 610 x 350 x 100mm thick and can be laid in either the 610mm or 350mm dimension or cut to the required opening, making them the ideal infill for beam and block flooring systems.

With their inherent thermal properties, these blocks provide a significant contribution to energy conservation. The Elemental Method outlined in Approved Document ‘L’ in support of the National Building Regulations requires a maximum U-value of 0.25W/m2K for ground floors.

Site Practice

After installation the FloorBlocks must first be grouted prior to any trafficking, loading or the application of screed. A 1:4 mix cement/sharp sand (by volume) should be used for the grout, with sufficient water to allow it to be brushed well into the joints between the FloorBlocks and the beams.

The floor should not be overloaded during construction, with planks laid across the beams for short term storage of lightweight materials. Any stacks should be placed as close as possible to the floor supporting walls.

Technical Data

Floor Block

Average density  (kg/m3)

600

Compressive strength (N/mm2)

3.5 (3.6*)

Thermal conductivity (W/m K)

0.15

Vapour resistivity

60MN s/gm

Co-efficient of linear expansion

8x10-6/K

Specific heat capacity

1.05kJ/kg K

Vapour diffusion resistance factor

12

BBA Certificate No

90/2467

Face size (mm)

610 x 350

Thickness (mm)

100

Block weight (kg)†

16.2

* When referencing the European Standard BS EN 771-4: 2003 the compressive strength values in brackets should be used.

†Weight is at typical block moisture content when laid. Some manufacturers may quote weights which have not allowed for this.

Beam and Block infill to achieve a 0.25 U-value with 65mm sand/cement screed finish plus added insulation (as noted below)

Ground floor P/A (perimeter/area)

0.6

0.5

0.45

Foundations (see notes below)

Aggregate

Celcon

Aggregate

Celcon

Aggregate

Celcon

Added Insulation required (mm)

Thermal conductivity (λ) = 0.023

60

50

55

45

55

45

Thermal conductivity (λ) =

75

60

70

55

70

55

Notes:
Aggregate = a lightweight aggregate concrete block (1400 kg/m3) both as infill for the beam and block flooring and in the foundations
Celcon = Celcon’s FloorBlock (610 x 350mm) as infill (610mm span) for the beam and block flooring and Celcon Foundation blocks below DPC (min 2 courses)

Pack Information

FloorBlocks (610mm x 350mm)

T = Block thickness (mm)

100

1200

1200

No. of blocks per pack

36

m2 per pack (depending on floor beams)

9.0 (approx)

Pack weight (excluing pallet) (kg)

583

This information has been sourced, reviewed and adapted from materials provided by H + H Celcon.

For more information on this source, please visit H + H Celcon.

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