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Cement Bonded Particleboard CETRIS® AKUSTIC
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Catalog excerpts

Cement Bonded Particleboard CETRIS® AKUSTIC - 1

ICETRIS 1 CEMENT BONDED PARTICLEBOARD The CETRIS® AKUSTIC cement bonded particleboard is made by working (drilling the regular holes) the basic type of CETRIS® BASIC board. Aside from the existing high mechanical parameters, this treatment also improves the product's acoustic properties. While the solid - base board of CETRIS® stands out predominantly with its high value of sound transmission loss, the drilled board is used as a sound absorbing cladding. As compared to other acoustic cladding materials when the CETRIS® AKUSTIC cement bonded particleboard is used, an extra high mechanical breakthrough resistance (for example, impact of a ball) and moisture resistance are secured - all of this with a high reaction-to-fire class (A2 -s1,d0) maintained. These parameters predestinate this new type of CETRIS® board mainly for the sports facilities, the areas with fluctuating temperatures and moistures and the structures with specific requirements. By building the CETRIS® AKUSTIC cement bound particle-board into the wall cladding system or the soffit (below the floor or roof structure) together with the bearing structure, the acoustically effective textile and inserted rock wool produce not only aesthetically interesting but also functional cladding that improves the architectural acoustics. Acoustics is also one of the important criteria in designing and implementing the civil engineering projects. It is the requirements for the impact transmission loss and the airborne sound transmission loss that are mainly put to the engineering structures - predominantly in cases when the structures (walls, ceilings...) separate the premises with different source of sound. In the situation when both noise source and users are present in the same room it is necessary to deal with the architectural acoustics. The lining of CETRIS® AKUSTIC board participates favourably in the improvement of architectural acoustics and sound absorption in inner premises. CETRIS® AKUSTIC Limit size deviations of CETRIS® AKUSTIC board

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Cement Bonded Particleboard CETRIS® AKUSTIC - 2

The sound absorption rate indicates the ratio of the unreflected sound energy and the reflected sound energy. a = 0 by complete reflection while a = 1 by complete absorption. The course of sound absorption factor in dependence on frequency in the various composition options with the CETRIS® AKUSTIC board is determined as follows (see Table): STRUCTURE DESCRIPTION CETRIS® AKUSTIC 8 mm mineral wool 40 mm air gap 50 mm CETRIS® AKUSTIC 10 mm mineral wool 40 mm air gap 50 mm CETRIS® AKUSTIC 8 mm mineral wool 40 mm air gap 300 mm CETRIS® AKUSTIC 10 mm mineral wool 40 mm air gap 300 mm

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Cement Bonded Particleboard CETRIS® AKUSTIC - 3

The basic data on packaging the CETRIS® AKUSTIC boards (applicable for a standard size of 1,250 x 625 mm) Storage, Handling, Packaging The drilled CETRIS® AKUSTIC cement bound particle-boards are stacked on the transport sole pieces that allow for handling. The particle-boards are fixed by wrapping them to the sole piece crosswise. The CETRIS® AKUSTIC boards are protected against climatic influences by the PE foil. However, this type of packaging is not intended for long-term protection against climatic influences. When stored, the top board may suffer deflection due to irregular drying of...

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Cement Bonded Particleboard CETRIS® AKUSTIC - 4

Assembly The system of soffits of CETRIS® AKUSTIC is fixed to a metal grate of CD profiles that are crossed either in one plane (using the cross connectors) or at two levels (connectors). As alternative, the substructure of wooden laths and scantlings can be used. Then, the CETRIS® AKUSTIC boards are mounted in one layer to the auxiliary structure using the screws. The following rules must be observed during assembly: We recommend to secure the KNAUF cross connectors for CD 60 x 27 profiles with M 6 x 40 screw with nut and washer as minimum. The connection of the carrying grid of 80 x 40 mm...

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Cement Bonded Particleboard CETRIS® AKUSTIC - 5

Bearing structure (CD profile or whole timber) Other Applications of CETRIS® Boards Soffit edge detail – full strip CETRIS® AKUSTIC board Screw 4.2 × 25 (35) mm with plastic front cap Cross connector Mounting CD profile (or a whole timber) Carrying CD profile (or a whole timber) Absorption fleece Mineral wool Strip – CETRIS® BASIC board

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Cement Bonded Particleboard CETRIS® AKUSTIC - 6

Soffit edge detail - rim Joint between the boards The CETRIS® AKUSTIC boards must not bind directly from the wall or soffit sheathing to the surrounding structures. They must not be anchored to the perimeter profile. The contraction joint in a structure must also be considered in the sheathing of CETRIS® AKUSTIC boards. Before anchoring the boards, the hole row linkage must be verified - not only in a crosswise and longitudinal directions but in a diagonal direction as well. Using self-drilling screws the acoustic boards shall be fastened to the sub-structure of either wooden laths or CD...

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Cement Bonded Particleboard CETRIS® AKUSTIC - 7

Other Applications of CETRIS® Boards spacing of mounting profiles spacing of mounting profiles Additional load of the soffit Burdens can be attached to the very sheathing of the CETRIS® AKUSTIC board (e.g., lights, air-conditioning, etc.) of a max. weight of 1.5 kg. Max. one burden is permitted to be mounted in one pane as delimited by the bearing structure (CD profiles or wooden laths). With burdens (suspended objects) of a weight up to 10 kg, these burdens must be anchored to the structural elements (of the bearing structure). Maximum permitted additional load of the bearing structure is...

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Cement Bonded Particleboard CETRIS® AKUSTIC - 8

CIDEM Hranice, a.s., division CETRIS Nova ulice 223 CZ-753 01 Hranice Czech Republic phone: +420 581 676 281 fax: +420 581 601 623 e-mail: cetris@cetris.cz www.cetris.cz Grammar school Wil, Switzerland

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