NBS Source
I'm a manufacturer

Compare variants

Hollow Dense Concrete Block
Hollow Dense Concrete Block

Verified 3 months ago

Thomas Armstrong (Concrete Blocks) Ltd

Hollow Dense Concrete Block 215 mm

Verified 3 months ago

Thomas Armstrong (Concrete Blocks) Ltd

Hollow Dense Concrete Block 140 mm

Summary
Hollow dense concrete blocks suitable for agricultural and commercial applications.
Hollow dense concrete blocks suitable for agricultural and commercial applications.
Application

Suitable for use in the following walls:

  • Large, external wall panels are required, e.g. sheds, bunkers, retaining walls.
  • Some or all of the cores can be filled with concrete and steel rebar to form extremely strong, reinforced walls with high resistance to lateral loads, ideal for lining swimming pools, ponds etc.
  • Inner and outer leaf of cavity walls over three storeys, internal partition walls, Part E and robust details acoustic separating walls, block and beam floor infill, foundation walls below DPC, decorative facing walls.

Suitable for use in the following walls:

  • Large, external wall panels are required, e.g. sheds, bunkers, retaining walls.
  • Some or all of the cores can be filled with concrete and steel rebar to form extremely strong, reinforced walls with high resistance to lateral loads, ideal for lining swimming pools, ponds etc.
  • Inner and outer leaf of cavity walls over three storeys, internal partition walls, Part E and robust details acoustic separating walls, block and beam floor infill, foundation walls below DPC, decorative facing walls.
Description

Hollow dense concrete blocks suitable for agricultural and commercial applications.


Features and benefits:

  • Manufactured to BS EN 771-3.
  • Strong, reinforced walls can be constructed quickly and economically.
  • Manufactured from Class 2 aggregates and consist of up to 20% recycled raw material.
  • Standard texture finish provides an excellent surface for mortars, renders and plasters.

Hollow dense concrete blocks suitable for agricultural and commercial applications.


Features and benefits:

  • Manufactured to BS EN 771-3.
  • Strong, reinforced walls can be constructed quickly and economically.
  • Manufactured from Class 2 aggregates and consist of up to 20% recycled raw material.
  • Standard texture finish provides an excellent surface for mortars, renders and plasters.
Digital objects
Color
Grey
Grey
Finish
Textured
Textured
Material
Concrete
Concrete
Shape
Rectangle
Rectangle
Length
440 mm
440 mm
Width
140 mm, 215 mm
140 mm, 215 mm
Height
215 mm
215 mm
Warranty description
Lifetime
Lifetime

Specification

Standard
To BS EN 771-3.
To BS EN 771-3.
Block description
Standard common block.
Standard common block.
Configuration
Group 2.
Group 2.
Compressive strength
-
-
Mean value
7.3 N/mm².
7.3 N/mm².
Characteristic value
4.7 N/mm².
5.1 N/mm².
Category
II.
II.
Freeze/ thaw resistance
Freeze thaw resistant.
Freeze thaw resistant.
Thermal conductivity
0.88 W/mK (inner leaf). 0.92 W/mK (outer leaf).
0.88 W/mK (inner leaf). 0.92 W/mK (outer leaf).
Recycled content
20%.
20%.
Work sizes (length x width x height)
440 x 215 x 215 mm.
440 x 215 x 140 mm.
Tolerance category
D1.
D1.
Density
-
-
Gross dry density
1850-2100 kg/m³.
1850-2100 kg/m³.
Net dry density
2000 kg/m³.
2000 kg/m³.
Reaction to fire
Class A1 to BS EN 13501-1.
Class A1 to BS EN 13501-1.
Water absorption by capillarity
90 g/(m2 x s-0.5).
90 g/(m2 x s-0.5).
Water vapour permeability
5/15 µ.
5/15 µ.

Additional properties

Thickness
215 mm.
140 mm.
Weight
257 kg/m²: walled weight.
26.0 kg: block weight.
193 kg/m²: walled weight.
19.6 kg: block weight.
Moisture movement
0.6 mm/m.
0.6 mm/m.
Environmental Product Declaration (EPD)
ISO 14001.
ISO 14001.
R-Value
0.24 m² K/W.
0.16 m² K/W.
Sound reduction
51 dB (Rw).
48 dB (Rw).

Sustainability data

Contains Red List materials
No
No
Country of material origin
United Kingdom
United Kingdom
Country of product manufacture
United Kingdom
United Kingdom
Material
Concrete
Concrete
A1–A3 ('Production stage')

Embodied carbon as defined in BS EN 15804

Lower emissions

Lower emissions

Normalized unit
-
-
Declared unit
8.98 kg CO₂ eq/m²
8.98 kg CO₂ eq/m²
Recyclability
100%
100%
Recycled content
20 %
20 %
Expected Life
Lifetime
Lifetime