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AB One - Precast concrete interlocking blocks

Third party certifications:
  • BBA Agrément Certificate

    Certificate type

Colinwell Masonry

Dry stack retaining wall system (1° setback).

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+44 (0)28 9061 8145 www.colinwell.com
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.

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.

Description

Allan Block is a hollow-core, dry-stacking concrete block for the construction of retaining walls. Designed with a 1° 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.
  • 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.

Applications:

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.

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.

General information
Color

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

Features

Anti-climb edge

Finish

Split Face Finish

Material

Concrete

Size

450 x 300 x 200 mm

Uniclass 2015
Aggregate concrete blocks (Pr_20_93_52_01)Primary
Specification data - Aggregate concrete blocks
Product Reference

AB One (1° Setback)

Colour

Abbey blend

Cinder blend

Limestone blend

Pewter blend

Slate blend

Yorkstone blend

Accessories/ Other requirements

Not required

AB Corner Block

200 x 400 x 200 mm (h x w x d), 26 kg (available left- or right-handed; insert requirements).

AB Wall Caps

100 x 450 x 300 mm (h x w x d), 27 kg (to be fixed with a high-grade, waterproof, flexible masonry adhesive).

Geogrid

For use when the block weight and setback do not provide enough structural support. For taller walls. Consult manufacturer for information.

No-Fines Concrete Backfill

Will allow taller walls to be constructed with less excavation. For taller walls. Consult manufacturer for information.

Standard product features

Size (h x w x d):

200 x 450 x 300 mm.

Finish:

Split-face texture.

Weight:

35 kg.

Technical characteristics:

  • Mean compressive strength: 30 N/mm².
  • Density: 2100 kg/m³.
  • Absorption rate: 3–6%.
  • Face coverage: 11.11 m² (approximately).

Product Options

Accessories/ Other requirements:

- Geogrid:

Typical Geogrid reinforced walls will require an excavation depth of 70% or more of the wall height to accommodate geogrid tails.

- No-Fines Concrete:

Will require an excavation depth of around 40% of the wall height.

Digital objects
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Revit
Revit 2016 2 2.0
IFC
- 1 1.3
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Third party certifications
  • 09/R147 : Certificate: Roads and Bridges Accredited
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