Standard internal wall block

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Formwork block HB 25/16

120

resistance to fire (REI)

Concrete thickness (cm)

56

Acoustic insulation (DB)

10

weight OF the single block (Kg)

Description

The Isotex HB 25/16 wood-cement formwork block is suitable for the construction of internal load-bearing walls. This particular block has a total thickness of 25 cm, maintaining a concrete thickness of 16 cm , as per technical standards. Thermal transmittance U=0.79 W/m²K, Acoustic insulation Rw = 56 dB, fire resistance REI120 and reaction to fire B,s1-d0.

All Isotex products are made using top-quality materials: 100% recycled fir wood, cement, iron oxide, and water, resulting in healthy products with no additives or chemical substances. The wood is mineralised with a natural mineral that makes it inert, therefore resistant to fire, parasites and atmospheric agents.

Sustainability certification:

Green building ANAB/ICEA
Environmental Declaration of Type III Products (EPD/FDES)
Indoor Air Comfort gold label for very low VOC emissions

Documents

Specifications

Indicative permissible flow rate (t/m) RcK - 30 N/mm2 interp. h = 3.00 m

Thermal transmittance U of the plastered wall including boundaries W/m2 K of wall. 3D method *

0,79

Thermal transmittance U of the plastered wall including boundaries W/m2 K of wall. 2D method **

Periodic thermal transmittance YIE [W/m2K] [W/m2K]

Acoustic insulation ** (dB)

[56*****]

Concrete volume requirement l/m2

126

Weight of the blocks Kg/m2

Weight of the single block (without concrete) Kg

Weight of the wall filled with non-plastered CONCRETE Kg/m2

382

Concrete thickness (cm)

Block wall thickness (cm)

4,5

Block size (cm)

50x25x25

REI Class fire resistance

120

Graphite thickness (cm)

* The calculation of thermal transmittance has been performed according to the criteria of standards UNI 10355 and UNI EN ISO 6946, using a three-dimensional finite element calculation application validated according to EN 10211/1 and on the basis of thermal conductivity data obtained from experimental evidence.
**Indicative two-dimensional calculation according to standards UNI-TS 13788, UNI 10355 and UNI 10351.
*** Note: The test certificates can be requested from ISOTEX or consulted on the WEBSITE. The tests were field tests in which the data was elaborated according to the indications provided by technical standards UNI EN ISO 140 and UNI EN ISO 717.
****Tests performed in the laboratory according to standards UNI EN ISO 140-3:2006 and UNI EN ISO 717-1:2007.
*****Tests performed in the laboratory according to standards UNI EN ISO 10140-2:2010 and UNI EN ISO 717-1:2007.

In reference to the type of material purchased, the company will provide EC Declaration of Performance (DOP).

Formwork block HB 25/16

56

10

Description

Documents

Specifications

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Isotex Academy – construction details

Video installation of blocks and floors

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