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We are Part of the Thomas Armstrong Group

THOMAS ARMSTRONG

(CONCRETE BLOCKS)

LTD

GALLERY

DISCLAIMER

The block and texture images are intended for indicative purposes only and actual textures and shades may vary between manufacturing locations. Please contact your regional sales office for further information and sample blocks. We advise the construction of sample panels on site as masonry appearance cannot be appreciated from individual block.

Hollow 'Standard' or 'Paint-grade'

HOLLOW DENSE CONCRETE BLOCKS

Hollow Dense concrete blocks are ideal for applications where a durable, lower-weight and high strength wall is required, either above or below damp-proof course (DPC). They are available in ‘Standard’ or ‘Paint-grade’ finishes.

The hollow cores can be filled with poured concrete and reinforced with steel to form incredibly strong walls for applications such as agricultural sheds, commercial and industrial buildings, storage bunkers, pond and pool linings and retaining walls.

 

Our Hollow Blocks are manufactured from high quality class 2 aggregates and consist of up to 30% recycled raw materials.

 

Hollow Dense Blocks are manufactured to BS EN 771-3 and are ISO 9001 Quality Assured, ISO 14001 Environmentally Certified and hold BES 6001 ‘Excellent’ and most locations.

APPLICATIONS

  • Agricultural and commercial buildings where large, exposed external wall panels are required, e.g. sheds, bunkers and retaining walls.
  • Some or all of the cores can be filled with poured concrete and steel rebar to form extremely strong reinforced walls with high resistance to lateral loads. Ideal for lining swimming pools, ponds etc.
  • High strength reinforced walls.
  • Retaining walls.
  • ‘Standard’ texture finish provides an excellent surface for mortars, renders and plasters.
  • ‘Paint-grade’ close-textured finish available for internal decorative, fair-faced or paint-grade applications.

KEY ADVANTAGE

  • Half the equivalent weight of a solid block of the same thickness.

DOCUMENTS

  •  

    PROPERTY

    REFERENCE

    'STANDARD' & 'PAINT-GRADE' FINISH VALUES

    Face Size (L x H)

    Dimensional Tolerance

    Gross Dry Density

    Mean Compressive Strengths

    Manufacturing Category

    Thermal Conductivity (Protected Inner Leaf)

    Thermal Conductivity (Exposed Outer Leaf)

    Moisture Movement

    Fire Resistance

    Configuration

    Available Texture Finishes

    BS EN 771-3

    BS EN 772-16

    BS EN 772-13

    BS EN 772-1

    BS EN 771-3

    BS EN 1745

    BS EN 1745

    BS EN 772-14

    BS EN 13501-1

    BS EN 1996-1-1

     

    Available Widths

    440mm x 215mm

    Category D1

    1850 - 2100 kg/m³

    7.3 N/mm²

    Category II

    0.88 W/mK

    0.92 W/mK

    < 0.6 mm/m

    Class A1 Reaction to Fire

    Hollow - Group 2

    Standard or Paint-grade

     

    140mm, 190mm or 215mm

  •  

    PHYSICAL PROPERTY

    BLOCK WIDTH

    140mm

    190mm

    215mm

    ‘R’ Value

    0.16 m²k/W

    0.17 m²k/W

    0.24 m²k/W

    Walled Weight

    Sound Reduction

    Block Weight

    Fire Resistance

    210 kg/m²

    50 Rw, dB

    19.6 kg

    4 Hours

    282 kg/m²

    51 Rw, dB

    23.5 kg

    4 Hours

    285 kg/m²

    52 Rw, dB

    26 kg

    6 Hours

  •  

    BLOCK WIDTH

    BLOCKS PER PACK

    m² PER PACK

    140mm

    190mm

    215mm

    60

    40

    40

    6.0

    4.0

    4.0

    Pack details may vary slightly between manufacturing locations. Always check details with your nearest sales office.