Manufacturer
Acosorb
Acosorb (Acosorb GmbH, Bocholt) develops and applies seamless acoustic spray and trowel plasters (acoustic plaster). The jointless wall and ceiling surfaces absorb sound and reduce reverberation while staying visually closed, with no visible joints, grids or cassettes. The spray plasters (Acospray range) are made of enriched, partly recycled cellulose fibres with a water-based binder and are applied in several cross-sprayed layers; Acoplaster F combines a non-combustible mineral-wool board with an acoustic-plaster top layer. Depending on layer thickness and build-up, absorption reaches up to the highest absorption class A. The materials are open to diffusion and hygroscopic (usable down to swimming pools and semi-outdoor areas), Cradle to Cradle Bronze certified and documented via an ISO 14025 EPD (MRPI) and Fraunhofer VOC verifications. Member of the DGNB. Reference projects in Germany and the Netherlands.
Documents
Acospray DC3
Acospray DC3
Description
Acospray DC3 is Acosorb's sustainable standard spray plaster with a coarse-grained, open-to-diffusion spray texture, made of enriched, recycled cellulose fibres and a binder. The recommended layer thickness is 10 to 50 mm; at 50 mm it reaches maximum absorption in the speech range. Tunable via layer thickness up to the highest absorption class A (αw 1.00 at 35 mm). Open to diffusion and hygroscopic, down to swimming pools and semi-outdoor areas. Weight around 1.3–1.8 kg/m² per 10 mm. Also available as a Green Line recyclate version (Billboard Grey, Apple Grey).
Technical data
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 6 variants
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.75 | 0.95 | 1.00 | 1.00 | 0.95 |
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| Compare | Value | |
|---|---|---|
| 1.4 in | NRC0.95 | |
| 1 in | NRC0.85 | |
| 1.2 in | NRC0.80 | |
| 0.8 in | NRC0.75 | |
| 0.6 in | NRC0.70 | |
| 0.4 in | NRC0.55 |
Test report: R031132aa.00001
NRC: 0.95 (derived from ISO 354 lab data)
Institute: LBP|SIGHT
Measurement date: 2011-09-13
Distance: Direct (no gap)
Measured values as a table (6 measurements)
| Build-up | NRC | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 10 mm · Direct (no gap) | 0.55 | – | 0.12 | – | – | 0.19 | – | – | 0.44 | – | – | 0.80 | – | – | 0.81 | – | – | 0.99 | – |
| 15 mm · Direct (no gap) | 0.70 | – | 0.14 | – | – | 0.25 | – | – | 0.60 | – | – | 0.95 | – | – | 0.97 | – | – | 1.01 | – |
| 20 mm · Direct (no gap) | 0.75 | – | 0.20 | – | – | 0.31 | – | – | 0.74 | – | – | 1.00 | – | – | 1.02 | – | – | 1.04 | – |
| 25 mm · Direct (no gap) | 0.85 | – | 0.23 | – | – | 0.49 | – | – | 0.92 | – | – | 1.06 | – | – | 1.02 | – | – | 1.01 | – |
| 35 mm · Direct (no gap) | 0.95 | – | 0.32 | – | – | 0.73 | – | – | 0.97 | – | – | 1.02 | – | – | 1.00 | – | – | 0.94 | – |
| 30 mm · Direct (no gap) | 0.80 | 0.18 | 0.36 | 0.37 | 0.47 | 0.54 | 0.56 | 0.68 | 0.75 | 0.83 | 0.93 | 0.95 | 1.02 | 1.01 | 1.01 | 0.99 | 0.99 | 0.99 | 1.00 |
Measured values as a table (6 measurements)
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