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AB Classic - Precast concrete interlocking blocks

Verified by manufacturer 15 days ago

Colinwell Masonry Third party certifications:
  • BBA Agrément Certificate

    BBA Agrément Certificate

    Certificate type

  • NSAI Agrément Certificate

    NSAI Agrément Certificate

    Certificate type

Mortarless Retaining Wall Blocks, which allow for the construction of mortarless retaining walls with a six degree setback.

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+44 (0)28 9061 8145 Website

Application

Suitable for:

  • All types of road and rail infrastructure projects that require approval by the Highways Agency (as the product holds a BBA Roads and Bridges certificate).
  • Large commercial and residential walls.
  • Low gravity (unreinforced) walls.

Description

Allan Block is a hollow-core, dry-stacking concrete block for the construction of retaining walls. Designed with a six degree raised front lip, which automatically establishes the setback from vertical.

Manufactured from a mixture of aggregates (65% recycled secondary aggregate content) and cement.


Features and benefits:

  • Cost-effective and versatile.
  • Offers high performance, quality, and lasting value.
  • Expected lifespan of 120 years (if designed and built in accordance with its British Board of Agrément (BBA), Roads and Bridges certificate).
  • Includes a hollow-core design which makes blocks easy to handle, promotes drainage and becomes solid when filled with stone.
  • Anti-climb edge.
  • Depending on site conditions, walls can be constructed up to 1.2 m in height, using the blocks and granular fill only.
  • Taller walls will require reinforcement, most often through the use of Geogrid, No-Fines Concrete or building a double-width gravity wall.
  • CE-marked and manufactured in accordance with BS EN 771-3, ISO 9001 and ISO 14001.
  • No need for pins, clips or mortar.
  • Can be constructed regardless of weather conditions.
  • Built-in drainage.
  • Durable and maintenance-free.
  • Freeze-thaw resistance.
  • High strength, durable block.
  • Efflorescence-free.

General information

Color

Abbey Blend, Cinder Blend, Limestone Blend, Pewter Blend, Slate Blend, Yorkstone Blend.

Grey

Red

Finish

Split-face finish.

-

Material

Concrete

Shape

Rectangle

Length

450 mm

Width

300 mm

Height

200 mm

Uniclass

Pr_20_93_52_01 Aggregate concrete blocksPrimary

CAWS

D41/310 Drystack interlocking masonry

F10/18 Concrete facing blockwork

F10/255 Concrete facing blockwork

Product range

Blocks

Specification data - Aggregate concrete blocks

Standard

To BS EN 771-3.

Block description

Split-face texture, hollow-core, dry-stacking, precast interlocking concrete blocks.

Raised front lip: 6° (automatically establishes the setback from vertical).

Compressive strength

-

Mean value

30 N/mm².

Freeze/ thaw resistance

Has freeze-thaw resistance.

-

Recycled content

65%.

Secondary aggregate content.

Work sizes (length x width x height)

450 x 300 x 200 mm.

Accessory and special shape types

Not required.

AB Corner Block.

  • H x W x D: 200 x 400 x 200 mm.
  • Available left or right-handed, 26 kg.
  • Insert requirements.

AB Junior.

  • H x W x D: 200 x 225 x 240 mm.
  • Weight: 18 kg.

AB Junior Lite.

  • H x W x D: 100 x 225 x 240 mm.
  • Weight: 9 kg.

AB Lite.

  • H x W x D: 100 x 450 x 300 mm.
  • Weight: 18 kg.

AB Wall Caps.

  • H x W x D: 100 x 450 x 300 mm.
  • To be fixed with a high-grade, waterproof, flexible masonry adhesive, 27 kg.

Geogrid.

  • For use when the block weight and setback do not provide enough structural support.
  • For taller walls.
  • Typical Geogrid reinforced walls will require an excavation depth of 70% or more of the wall height, to accommodate geogrid tails.
  • Consult manufacturer for information.

No-Fines Concrete Backfill.

  • Will allow taller walls to be constructed with less excavation.
  • For taller walls.
  • Will require an excavation depth of approximately 40% of the wall height.
  • Consult manufacturer for information.

Colour

Abbey blend.

Cinder blend.

Limestone blend.

Pewter blend.

Slate blend.

Show more

Angle

Setback: 6°.

Weight

35 kg.

Material/ Finish

Concrete mixture of aggregates and cement, split-face texture.

Average density

2100 kg/m³.

Water absorption

3–6%.

Efflorescence

None.

Life expectancy

120 year.

If designed and built in accordance with its British Board of Agrément (BBA), Roads and Bridges certificate.

Sustainability data

Country of material origin

United Kingdom

Country of product manufacture

United Kingdom

Recycled content

65 %

Secondary aggregate content.

BIM objects

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NBS BIM object standard

This BIM object has been authored to meet the requirements of the NBS BIM object standard.

Find out more about the NBS BIM object standard.

Platform Compatible Version
Revit

Revit 2016

2

IFC
-

1

Third party certifications

BBA Agrément Certificate

BBA Agrément Certificate

BS EN ISO 9001 Quality Management Systems

BBA Agrément Certificate

BBA Agrément Certificate

EN ISO 14001 Environmental Management Systems

NSAI Agrément Certificate

NSAI Agrément Certificate

NSAI Certificate of Conformity

Case studies

Millmount Village, Dundonald, Belfast

Millmount Village, Dundonald, Belfast

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