Home > Companies > Acheson & Glover > Alphacrete® Acoustic Masonry Blocks

Achieving the right reverberation characteristics is critical to the acoustic performance of an interior space. Alphacrete Acoustic has been specially developed to offer higher levels of sound absorption than standard masonry block – providing a simple and cost-effective solution to reducing airborne noise and excess reverberation that reduces speech intelligibility and acoustic performance in conventional constructions.

Alphacrete Acoustic is the only independently-tested masonry block available that meets both the acoustic performance standards for the Department of Education’s Priority School Building Programme (PSBP) and Class D sound absorption levels to BS EN ISO354:2003 ‘The Laboratory Measurement of Random Incidence Sound Absorption’.

Alphacrete Acoustic is produced with a special hollow core geometry and profile, but with the standard faces (215 x 440 mm) of AG’s Alphacrete Athena and Corinthian architectural masonry ranges – providing the same high quality, pre-finished low maintenance appearance. All faces are designed to be exposed except the top and bottom of the unit.

Specifiers and contractors can choose from an extensive choice of colours and special detailing shapes to flexibly create projects with visual impact. There are also a wide choice of block sizes, finishes and colours within the standard range of Alphacrete concrete architectural masonry blocks that complement the Alphacrete Acoustic blocks.

Typical applications:

Sports halls, swimming pools, classrooms, multi-purpose halls, fitness suites, atria, commercial and domestic circulation spaces (stairwells), libraries, cinemas and environmental noise barriers.

Please consult Acheson & Glover technical literature for further details.

Standard product features

Standard:

Manufactured to BS EN 771-3.

Sound absorption (independently tested to BS EN ISO 354:2003):

Class D sound absorber as defined by BS EN ISO 11654.

  • Ernestone Buff/ Classico Blanco 215 mm: 0.35 NRC (ASTM C423)/ 0.40 αW (BS EN ISO 11654).
  • Ernestone Buff/ Classico Blanco 140 mm: 0.40 NRC (ASTM C423)/ 0.40 αW (BS EN ISO 11654).
  • Other colours 215 mm: 0.25 NRC (ASTM C423)/ 0.30 αW (BS EN ISO 11654).
  • Other colours 140 mm: 0.25 NRC (ASTM C423)/ 0.30 αW (BS EN ISO 11654).

Sound insulation (Rw values):

43–47 dB.

Light reflectance values (daylight/ fluorescent light):

  • Baroque Terracotta - 20.
  • Classico Blanco - 68.
  • Ernestone Buff - 53.
  • Francesco Ash - 30.
  • Minerva Basalt - 13.
  • Palazzo Sepia - 21.
  • Pantheon Amber -14.
  • Sporting Green -48.
  • Verona Sand - 28.

Compressive strength:

10 N/mm².

Density:

2000 kg/m².

Drying shrinkage:

0.034% Mean.

Moisture movement:

<0.5 mm/m.

Bond strength:

0.15 N/mm².

Thermal conductivity:

Protected: 1.46 W/mk.

Air tightness:

Generally air leakage at 50 Pascals less than 3.1 CM/hr/ m².

Sustainability:

  • Energy use: 100% renewable energy.
  • Water used: 100% rain water harvesting.
  • Recyclability: 100% of this product can be recycled.
  • Manufacturing location: Produced in the UK with locally sourced materials.
  • Waste wood and plastic: 100% recycled.
  • Carbon footprint: A308 (hollow 440 x 215 x 140 mm): 30.5 kg CO2/m², A208 (hollow 440 x 215 x 215 mm): 20.4 kg CO2/m².
  • BREEAM rating: A, in accordance with the Green Guide to specification.

CE marking:

CE marked; Certificate 06/1-7-13, attestation Level 4 CPR (2011) Annex V.

Options

Special shapes:

There are a wide choice of block sizes, finishes and colours within the standard range of Alphacrete concrete architectural masonry blocks that complement the Alphacrete Acoustic blocks including a comprehensive selection of special shapes for detailing purposes. Consult Acheson & Glover technical literature for further details.

NBS Specification

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This product is associated with the following NBS Create clause:
45-80-50/300 Aggregate concrete blocks

NBS Specification

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This product is associated with the following NBS clauses:

Product specification

An important note about specifying

Manufacturer

Name:

Acheson & Glover

Tel:

+44 (0) 28 8778 8112

Product reference

Alphacrete® Acoustic Masonry Blocks

Size

[215 x 440 x 140 mm]
[215 x 440 x 215 mm]

Colour

[Baroque Terracotta]
[Classico Blanco]
[Ernestone Buff]
[Francesco Ash]
[Minerva Basalt]
[Palazzo Sepia]
[Pantheon Amber]
[Sienna Veronese]
[Venetian Red]
[Verona Sand]
[Sporting Green]

Finish

[Athena]
-
Fine surface finish and sharp, straight arise.
[Corinthian]
-
Dimpled texture giving a weathered appearance of naturally dressed coarse textured stone.

Special shapes

[ ______ ]

Manufacturer details

64 Old Moy Road,
Dungannon ,
Co Tyrone, BT71 6PU
Tel +44 (0) 28 8778 8112
Fax +44 (0)28 8952 1866
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