Silent. Groundbreaking innovation in structure-borne sound and impact noise insulation. Extended and tested Silent product range

Transcription

1 Extended and tested Silent product range Silent Groundbreaking innovation in structure-borne sound and impact noise insulation RINO SILENT ORSO DURA CRET RIBA ARBO More performance. More value. 1

2 Silent the tested product range that sets new standards in acoustics We live in a loud world. Noise makes people ill, wears on their nerves, spoils their concentration. The need for greater peace and quiet in our private and professional lives is a legitimate aspiration. With it come higher expectations on noise insulation in buildings. The Aschwanden range of innovative Silent products already allows this factor to be taken into account when planning concrete structures. 2

3 Silent Scientifically verified and tested at the EMPA and the Fraunhofer Institute IBP In structural engineering, the demands on noise insulation are increasing steadily on one hand through legislation and codes, and on the other hand from owners and principals themselves. In response, our innovative and qualitatively superior load transmission elements are being consistently optimised. Consequently, in close collaboration with institutes of the University of Applied Sciences and Arts Northwestern Switzerland FHNW and the Hochschule für Technik Rapperswil HSR, noise insulating Silent variants of our CRET shear load connectors, ARBO shear load elements, RIBA anchors and NELL supports have been developed. These products are the result of extensive studies of building acoustics. The acoustical properties of these new Silent elements have been analysed in over 50 test series. In the course of testing, a variety of insulation materials were investigated at a wide range of excitation frequencies to determine their vibration and structure-borne noise damping properties with particular regard to extended service life of the materials used. Subsequently, the acoustical properties of the elements were verified at the EMPA / Fraunhofer Institute IBP. The resulting productspecific impact noise reduction factors ( L w ) are based on measurements made in realistic testing conditions. The significantly improved impact noise reduction of the Silent elements is equivalent to an audibility that is several times lower. Outstanding quality In addition to their superb structural properties, the new Silent load transmission elements exhibit enhanced noise reduction characteristics. Outstanding features are the use of new, select-grade materials (PUR) and their completely innovative design. As a result, they allow straightforward and acoustically efficient insulation of structural elements. Our quality assurance system covers materials testing, design and technical documentation of the individual products, including conformance with codes and protection provisions. In production, our quality management is based on a tightly woven network of controls incorporating seamless monitoring of both raw materials and semi-finished products, as well as the manufacturing processes themselves. Customer benefits at a glance Excellent structural and acoustically enhanced properties Significant impact sound reduction ( L w ) Several times lower audibility EMPA / Fraunhofer Institute IBP tested No arbitrary selection of data Extensive scientific, building acoustics studies Sound reduction quantified in one-third octave bands Experimental verification of strength and deflection capacity of the acoustic elements Minimum outlay for planning and construction work 3

4 Silent optimal products for every application RIBA Silent-915, -917, (-912, -914) Sound damping tensile and compression anchors ARBO Silent-700 Sound damping shear load elements NELL Silent-Isolmat Noise insulation supports NELL Silent Sound damping deformation supports CRET Silent-945 APG Sound damping shear load connectors CRET Silent-984, -985, -986, (-980, -981) Heavy-duty sound damping shear load connectors CRET Silent-960, -970 Heavy-duty sound damping shear load connectors 4

5 Silent Contents CRET Silent shear load connectors Movement joints prevent uncontrolled crack formation and resulting damage such as leakage and corrosion. CRET Silent connectors not only facilitate shear load transmission and deflection compatibility between adjacent building elements, but also the acoustic isolation of building and/or structural elements such as stairways, landings, balconies, pathways etc. ARBO Silent shear load elements Exhibit excellent impact sound reduction and optimal thermal insulation properties. ARBO Silent shear load elements facilitate the transmission of normal and shear loads between reinforced concrete building components that are separated by sound damping joints of 60 to 200 mm width. RIBA Silent tensile and compression anchors Free-standing structures such as self-supporting access balconies need horizontal stabilisation. RIBA Silent anchors not only allow normal load transmission in movement joints, but also the acoustic decoupling of impact sound bridges that are created in static load-bearing joints. NELL Silent stairway supports These new sound damping deformation supports with PUR and PE joint foam inlays are designed to support prefabricated stairs and reduce impact sound transmission between landings. NELL Silent-Isolmat noise insulation support Noise insulation supports for placement under structural and non-structural walls. Strips of permanently elastic and polyurethane bonded rubber granulate. Supplied in rolls. Page Product Application 4 Silent Ideal, all-round product for any application 6 Silent Increased needs of modern society 8 Silent Production overview 10 CRET Silent-945 APG Connectors for uniaxial Sound damping shear load transmission shear load connectors with sound damping effect, height adjustable 12 CRET Silent-960, -960P Connectors for uniaxial Sound damping heavy-duty shear load transmission and shear load connectors sound damping of cast in-situ or prefabricated building elements 14 CRET Silent-970, -970P Connectors for uniaxial Sound damping heavy-duty shear load transmission and shear load connectors sound damping of cast in-situ or prefabricated building elements 16 CRET Silent-984, -985, -986, Connectors for uniaxial (980, -981) shear load transmission and Sound damping heavy-duty sound damping of cast shear load connectors in-situ or prefabricated building elements 18 ARBO Silent-700 High-quality sound and Sound damping thermally insulating reinforceshear load elements ment elements for the support of reinforced concrete elements that are separated by wide thermal insulation joints 20 RIBA Silent-915, -917, Sound damping elements for (-912, -914) the uniaxial transmission of Sound damping tension tension and compression forces, and compression anchors e.g. in parapets, double-walls 22 NELL Silent Deformation supports with Sound damping elevated sound damping for deformation supports the transmission of normal load, e.g. in prefabricated staircases 24 NELL Silent-Isolmat Sound damping supports Sound damping supports for structural and non-structural walls 26 Impact noise principles Principles of the measurement and evaluation process for Silent products 28 Silent installation Installation configuration for impact noise elements 34 Aschwanden product range and services 5

6 Silent increased needs of modern society Thanks to ongoing advances in technology, there are a steadily increasing number of products on offer that reduce noise emission levels. At the same time, however, people are exposed to a greater diversity of sources of noise. Moreover, our modern society longs for peace and quiet. Consequently, inhabitants owning or renting property are ever less willing to simply accept the in trusion of noise, and are demanding better levels of protection against noise. Building owners and principals are relaying this demand to planners. This greater need for quiet, including the more stringent requirements of building codes, is leading increasingly to improved insulation against external noise. However, with lower external noise levels comes a heightened perception of unwelcome internal noise. For this reason, not only the transmission of airborne noise from one internal room to another, but also the transmission of structure-borne and impact noise is of considerable significance. Impact noise is generated by people walking, whereby the floor is deformed locally. Sound waves are created that propagate through the building structure and cause other structural elements to oscillate. These oscillations radiate sound waves that are audible as impact noise (see illustration of sound propagation in buildings). Laying carpets can significantly reduce impact noise at its source. In contemporary interior design, however, carpets are not fashionable far more popular are parquet, tiled and natural stone floors. Here, the vibration decoupling of building elements is extremely important. It allows the propagation of structure-borne and impact noise to be reduced and depending on the acoustic quality of the isolation the radiated structure-borne noise to be significantly lowered or even eliminated completely. In addition to the selection of high quality products, the professional installation and application of these products are crucial. Unlike other physical processes such as heat transmission, even the smallest structure-borne sound bridge can significantly reduce the impact noise insulation effect, or at worst, cancel it entirely. This is because even a modest amount of energy is sufficient to acoustically excite building elements. There is no need for extensive transmission points; the existence of a small, rigid bridge is enough to trigger the effect. To avoid creating structure-borne sound bridges during construction work, installation instructions are available for every type of Silent element. Original German text by Prof. Dr. Ing. Urs Bopp SIA/VDI and Prof. Dr. sc. math. Marcel Steiner, School of Engineering at the University of Applied Sciences and Arts Northwestern Switzerland FHNW 6

7 Silent Internal noise Impact sound External noise Sound propagation in buildings 7

8 Production overview CRET Silent for cast in-situ concrete Type Joint gap Load (F Rd ) L w Impact sound reduction Standard Special* [mm] [kn] [db] CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent * Special products: made to order CRET Silent for prefabrications Type Joint gap Load (F Rd ) L w Impact sound reduction Standard [mm] [kn] [db] CRET Silent-960 P CRET Silent-970 P CRET Silent-945 APG ARBO Silent Type Joint gap L w Impact sound reduction Standard [mm] [db] CRET Silent-960 P RIBA Silent Type Max. Load under Load area under Load area under L w Impact Standard Special* joint gap tension compression (ele- compression (ele- sound (F Rd ) ment restrained ment restrained reduction in transverse not in transverse direction) (F Rd ) direction (F Rd ) [mm] [kn] [kn] [kn] [db] RIBA Silent RIBA Silent RIBA Silent RIBA Silent * Special products: made to order 8

9 Silent NELL Silent Type Standard Load (F Rd ) L w Impact sound reduction Standard support length [mm] [kn] [db] NELL Silent-Z NELL Silent-Z NELL Silent-Z NELL Silent-L NELL Silent-L NELL Silent-L NELL Silent-F NELL Silent-F NELL Silent-F NELL Silent-W 2000 Designed 39 as spacer NELL Silent-Isolmat Type Load Support width Support width Support width Support width L w Impact Standard 125 mm 150 mm 175 mm 200 mm sound reduction [N/mm 2 ] F adm [kn/m 1 ] F adm [kn/m 1 ] F adm [kn/m 1 ] F adm [kn/m 1 ] [db] NELL Silent-Isolmat Customised models made to order. See specific product documentation for details, or check our website 9

10 Sleeve Dowel APG Sound damping shear load connector CRET Silent-945 APG Function Uniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of prefabricated building elements such as stairways, landings, balconies, access pathways etc. The thread is height adjustable over a range of approximately 0 to 12 mm. This allows adjustment of prefabricated elements. From the EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for CRET Silent-945 APG connectors: L w = 35 db 10

11 Measurement results of impact sound reduction (one-third octave bands) The results of the EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the configuration with the CRET Silent-945 APG connector, based on a rigid landing. 60 Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-945 APG Load table Concrete C20/25 Joint v [mm] Load F Rd [kn] e 50 mm e 50 mm Validity of strength figures according to GTC System diagram F h h e = f + f f f h min = 160 mm a D a R e a D,min = 350 mm a R, min = a D, min 2 11

12 CRET Silent-960 CRET Silent-960P Heavy-duty shear load connectors with sound insulation CRET Silent-960, -960P CRET Silent-960P CRET Silent-960 Function Uniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in-situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc. From the EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for CRET Silent-960 and -960P connectors: CRET Silent-960 for cast in-situ building elements L w = 22 db CRET Silent-960P for prefabricated building elements Load table F e = f + f Concrete C20/25 Joint ( f e) F Rd [kn] Joint ( f 45 mm) F Rd [kn] e 20 mm 30.9 e 45 mm 26.6 f f e Standard dowel length: 420 mm FRd = Design value of dowel strength e 25 mm 29.9 e 50 mm 25.9 e 30 mm 29.1 e 55 mm 25.1 e 35 mm 28.2 e 60 mm 24.4 e 40 mm 27.4 Validity of strength figures according to GTC 12

13 Measurement results of impact sound reduction (one-third octave bands) The results of the EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the configuration with CRET Silent-960 and -960P elements, based on a rigid landing. Minimal structural element dimensions With centric installation of the dowel, minimum slab thickness is 180 mm. 50 Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-960 Distance between connectors h a R, min = a D, min 2 a R a D In slabs, distance to edge a R and distance between connectors a D should not fall below the following minimum values: a D, min for slabs without shear reinforcement Concrete C20/25 Joint Slab h [mm] a D, min minimum distance between connectors [mm] e 20 mm e 40 mm e 60 mm

14 CRET Silent-970 CRET Silent-970P Heavy-duty shear load connectors with sound insulation CRET Silent-970, -970P CRET Silent-970P CRET Silent-970 Function Uniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in-situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc. From the EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for CRET Silent-970 and -970P connectors: CRET Silent-970 for cast in-situ building elements L w = 28 db CRET Silent-970P for prefabricated building elements Load table F e = f + f Concrete C20/25 Joint ( f e) F Rd [kn] Joint ( f 45 mm) F Rd [kn] e 20 mm 26.1 e 45 mm 22.0 f f e Standard dowel length: 420 mm F Rd = Design value of dowel strength e 25 mm 25.2 e 50 mm 21.3 e 30 mm 24.3 e 55 mm 20.6 e 35 mm 23.5 e 60 mm 19.9 e 40 mm 22.7 Validity of strength figures according to GTC 14

15 Measurement results of impact sound reduction (one-third octave bands) The results of the EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the configuration with CRET Silent-970 and -970P elements, based on a rigid landing. Minimal structural element dimensions With centric installation of the dowel, minimum slab thickness is 180 mm. 50 Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-970 Distance between connectors h a R, min = a D, min 2 a R a D In slabs, distance to edge a R and distance between connectors a D should not fall below the following minimum values: a D, min for slabs without shear reinforcement Concrete C20/25 Joint Slab h [mm] a D, min minimum distance between connectors [mm] e 20 mm e 40 mm e 60 mm

16 CRET Silent-984 CRET Silent-985 CRET Silent-986 CRET Silent-980 CRET Silent-981 Heavy-duty shear load connectors with sound insulation CRET Silent-984, -985, -986, (-980, -981) Function Uniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced support of cast in-situ or prefabricated building elements such as stairways, landings, balconies, access pathways etc. From the Fraunhofer Institute IBP / EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for CRET Silent connectors: CRET Silent-984 L w = 30 db CRET Silent-985 L w = 30 db CRET Silent-986 L w = 23 db CRET Silent-980 L w = 39 db CRET Silent-981 L w = 39 db System diagram F h f f e = f + f e a D a R 16

17 Measurement results of impact sound reduction (one-third octave bands) The results of the Fraunhofer Institute IBP / EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the configuration with CRET Silent-984, -985, -986, (-980, -981) elements, based on a rigid landing. 60 Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-984, -985, -986, (-980, -981) The individual one-third octave band results are shown in the product documentation CRET Silent-984, -985, -986, (-980, -981) available in German and French. CRET Silent-984, -985 CRET Silent-986 CRET Silent-980, -981 Load table Type e F Rd [mm] [kn] CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent Type e F Rd [mm] [kn] CRET Silent * CRET Silent * CRET Silent * CRET Silent * CRET Silent * CRET Silent * CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent * CRET Silent * CRET Silent * CRET Silent * CRET Silent * CRET Silent * * Special products: made to order CRET Silent CRET Silent CRET Silent CRET Silent CRET Silent Validity of strength figures according to GTC 17

18 ARBO Silent-700 Sound and thermally insulating shear load element ARBO Silent-700 Function High-quality sound and thermally insulating console element for the support of reinforced concrete components that are separated by wide thermal insulation joints. From the EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for ARBO Silent-700 console elements: L w = 16 db Fire protection The 30 mm concrete underside covering meets the requirements of fire resistance class R90 to SIA 262. A mineral wool thermal insulation panel is inserted in the underside of the insulation element for the fire protection range up to 750 C. Behaviour under load ARBO Silent-700 series elements transfer normal and shear loads between reinforced concrete building components that are separated by insulation gaps of 60 to 160 mm width. e Q Q H v n (Tensile or compression) 18

19 Measurement results of impact sound reduction (one-third octave bands) The results of the EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the con figuration with ARBO Silent-700 console elements, based on a rigid landing. Length related thermal transmission coefficient of ARBO Silent-700 elements data sheet Numerical values for can either be read off the two tables, or within the illustrated ranges of a and e calculated using the formula. Impact sound reduction L [db] One-third octave frequency [Hz] [W/(m K)] e [mm] 1 a = 250 m 3 a = 500 m 5 a = 1000 m 7 a = 2000 m 2 a = 350 m 4 a = 750 m 6 a = 1500 m Impact sound reduction ARBO Silent-700 Curves for identical distance between centrelines (a) Results of thermal transmission The illustrations show the significantly more favour able surface temperatures of the ARBO Silent element. Also discernible is the critical zone on the inner edge (slab underside), whereby in the case of the ARBO Silent element, this can be localised, but the deviations are in a magnitude of only 0.1 C. Continuous slab 1 1 ARBO Silent-700 with centreline distance a = 450 mm 1 R int = 0.35 m 2 K / W T int = +20 C R int = 0.25 m 2 K / W T int = +20 C 3 R ext = 0.04 m 2 K / W T ext = 10 C Formula for calculating thermal transmission (a, e) = + exp ( e) (e ) 2 a 0.96 [W/(m K)] e [mm] a [mm] 19

20 Box Model A Model B Model C Bolted tension and compression anchors with sound insulation RIBA Silent-915, -917, (-912, -914) Function Uniaxial shear load transmission; sound insulation effect. Typical applications: sound reduced anchorage of building elements such as parapets, double walls, stabilisation of free-standing balconies and access pathways etc. From the Fraunhofer Institute IBP / EMPA measurements for evaluation of impact sound reduction L w compared to a rigid landing, the following value was derived for RIBA Silent: RIBA Silent-915 L w = 33 db RIBA Silent-917 L w = 33 db RIBA Silent-912 L w = 39 db RIBA Silent-914 L w = 39 db 20

21 Measurement results of impact sound reduction (one-third octave bands) The results of the Fraunhof IBP / EMPA measurements are shown in the graph below as one-third octave values for impact sound reduction L = L n,r,0 L n,r of the configuration with RIBA Silent elements, based on a rigid landing Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction RIBA Silent-915, -917, (-912, -914) The individual one-third octave band results are shown in the product documentation RIBA Silent-915, -917, (-912, -914) available in German and French. RIBA Silent-915 RIBA Silent-917 RIBA Silent-912, -914 Load table Type Tensile and Max. Tensile force Compression force Compression force compression Joint gap (F Rd ) (Building element (Building element anchors restrained in not restrained in the transverse the transverse direction (F Rd ) direction) (F Rd ) [mm] [mm] [kn] [kn] [kn] RIBA Silent RIBA Silent RIBA Silent RIBA Silent RIBA Silent RIBA Silent RIBA Silent * RIBA Silent * Validity of strength figures according to GTC * Special products: made to order 21

22 NELL Silent-Z NELL Silent-L NELL Silent-F NELL Silent-W Stairway support with sound insulation NELL Silent Function Transmission of normal forces; sound reduced effect. Typical applications: sound insulating support of prefabricated stairs. From the results of the EMPA measurements for the evaluated impact sound reduction L w, the following value was derived for CRET Silent-980, based on a rigid landing: As the materials used for the NELL Silent stairway supports are the same as those of the CRET Silent-980 shear load connectors, the same impact sound reduction L w = 39 db can be assumed, particularly as the insulation elements of the stairway supports are not enclosed in sleeves in the way that the shear load dowels are. L w = 39 db 22

23 Measurement results of impact sound reduction (one-third octave bands) Results of EMPA measurements: impact sound reduction of a CRET Silent-980 shear load connector, comparable with a NELL Silent stairway support. 60 Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-980 Load table Model Standard support length [mm] Permissible load F adm [kn] Load F Rd [kn] Deflection v [mm] NELL Silent-Z E E = 150 mm L E NELL Silent-L NELL Silent-F NELL Silent-W 2000 Load: structural spacer Model Standard support length [mm] Permissible load F adm [kn] Load F Rd [kn] Deflection v [mm] NELL Silent-Z E L E NELL Silent-L E = 150 mm NELL Silent-F NELL Silent-W 2000 Load: structural spacer Model Standard support length [mm] Permissible load F adm [kn] Load F Rd [kn] Deflection v [mm] NELL Silent-Z E E = 150 mm L E NELL Silent-L NELL Silent-F NELL Silent-W 2000 Load: structural spacer Validity of strength figures according to GTC 23

24 NELL Silent-Isolmat Noise insulation support NELL Silent-Isolmat Function NELL Silent-Isolmat is a noise insulation support placed under structural and non-structural walls, made of permanently elastic, polyurethane-bonded rubber granulate with adequate ageing properties, temperature resistant between -20 C and +80 C, water resistant. The evaluated impact sound reduction is comparable to that of the CRET Silent-970 shear load connector, i.e.: NELL Silent-Isolmat L w = 28 db Using structure-borne sound and vibration measurements undertaken in the laboratory of the FHNW, insulation properties were determined for NELL Silent-Isolmat noise insulation supports that are similar to the insulation material used in the CRET Silent-970 shear load connectors. For this reason, comparable sound reduction levels may be assumed. 24

25 Measurement results of impact sound reduction (one-third octave bands) The impact sound reduction levels achieved with NELL Silent-Isolmat are comparable with those shown in the graphic for CRET Silent Impact sound reduction L [db] One-third octave frequency [Hz] Impact sound reduction CRET Silent-970 Thickness h = 5 mm: Load [N/mm 2 ] Support widths: 125 mm F adm [kn/m 1 ] 150 mm F adm [kn/m 1 ] 175 mm F adm [kn/m 1 ] 200 mm F adm [kn/m 1 ] Deflection (short-term value): % in von h mm % % % 1.20 Validity of strength figures according to GTC 25

26 Measurement and evaluation procedure for Silent products Realistic tests at the Fraunhofer Institute for Buildings Physics IBP and the EMPA The test rig concept allows original Silent elements to be tested realistically in the installed condition. The test chamber is isolated from the rest of the building so that bypass paths can be excluded. This test set-up comes very close to a true installed situation. The concrete slab in the transmission chamber is excited using a standard tapping machine. The reference installation is a rigidly built in landing slab. EMPA Reports on Findings: CRET Silent-945 APG Nr CRET Silent-960, -970 Nr /2 CRET Silent-980, -981 Nr ARBO Silent-700 Nr RIBA Silent-912 Nr Fraunhofer Institute IBP Reports on Findings: CRET Silent-985 P-BA 9/2014 CRET Silent-986 P-BA 11/2014 RIBA Silent-915 P-BA 12/2014 RIBA Silent-917 P-BA 13/2014 Measurement and evaluation procedure For testing purposes at the EMPA / Fraunhofer Institute IBP, a measurement procedure based on the standard for ceiling constructions (SN EN ISO 140-8:1997 (SIA ) or DIN EN ISO 10140) was used because currently, there is no international test procedure for landing or stair supports. This standards regulate impact sound measurement, for example with floating floor treatment. Evaluated impact sound reduction L w For simplified characterisation of sound insulating ele- ments a single value is often required rather than the impact sound reduction of all 16 one-third octave bands. Because there is currently no international test procedure for landing and stairway supports, this single figure for the Silent elements has been stated in the form of an evaluated impact sound reduction L w to EN ISO This procedure can be readily applied to the case under review. It has also be confirmed by other investigations (E. Taskan, et al. Proposal for a Mathematical Model for Predicting Impact Sound Transmission in Decoupled Solid Stairways. Symposium documents, DAGA 2010, Berlin). According to EN ISO the impact sound L n,r, or L n,r,0 curve plotted from the above measurements in the 100 Hz to 3150 Hz frequency bandwidth is compared against a reference curve (see Evaluated Normal Impact Sound Pressure Level). The reference curve is vertically offset in increments of 1 db until the sum of the differences between the impact sound pressure level and the reference curve in the one-third octaves in which the impact sound pressure levels are higher than the reference curve is less than 32 db. The level value of the offset reference curve at 500 Hz is then equivalent to the evaluated standard impact sound level L n,r,w or L n,r,0,w of the reference measurement. The evaluated impact sound reduction is then given by: L w = L n,r,o,w L n,r,w One-third octave band measurements were conducted in the reception area for: (a) Impact sound pressure level L n,r,0 of the structure with a rigid slab (= reference measurement). (b) The corresponding value L n,r of the slab connected by a Silent series product (= measurement with sound damping measure). The sound damping effect in the individual one-third octave bands is given by the resultant difference: L = L n,r,0 - L n,r 26

27 Silent Evaluated standard impact sound level Evaluated standard impact sound level L n,r [db] Measured impact sound level L n,r Reference curve Offset reference curve Evaluated standard impact sound level One-third octave frequency [Hz] Measurement configuration at the EMPA / Fraunhofer Institute IBP Transmission chamber Acoustic chamber (acoustically isolated from main building) Tapping machine Load Elastic support Acoustic insulation 27

28 Installation of impact sound elements CRET Silent-984, -985, -986, (-980, -981) 1. Nail CRET sleeve to the shuttering. 2. Remove shuttering and nails, apply max. 100 kg/m 3 mineral wool filler material. 3. Insert the CRET dowel. 4. Mask the dowel plate and filler material joints. 28

29 Silent CRET Silent-960, Nail CRET sleeve to the shuttering. 2. Remove shuttering and nails, apply max. 100 kg/m 3 mineral wool filler material. 3. Insert the CRET dowel. 4. Mask the dowel plate and filler material joints. 29

30 Installation of impact sound elements CRET Silent-945 APG 1. Nail CRET sleeve to the shuttering. 2. Remove shuttering and nails, apply max. 100 kg/m 3 mineral wool filler material, insert the CRET dowel. 3. Mask the dowel plate and filler material joints. No need for masking if precast concrete elements are used. 4. Install the precast element and use the dowel plate for fine adjustment. 30

31 Silent RIBA Silent-915, -917, (-912, -914) 1. Nail RIBA sleeve to the shuttering. 2. Remove shuttering and nails, apply max. 100 kg/m 3 mineral wool filler material. 3. Screw in the anchor. 4. Mask the anchor and filler material joints. 31

32 Installation of impact sound elements ARBO Silent Place the ARBO Silent element on the shuttering. 2. Join up insulation material max. 100 kg/m 3 mineral wool and mask it against the first casting phase. 3. Cast the first slab and mask it against the second casting phase. 4. Cast the second slab. 32

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34 Aschwanden product range and services Cret Shear load connectors for the design of high-quality shear load transmission and anchorage of movement joints. Arbo Cantilever slab connectors with excellent thermal insulation of thermally isolated concrete slabs. RIBA Anchors made of stainless steel provide optimal safety in the transmission of tensile and compression forces between two separate reinforced concrete elements; also for anchoring balustrades, piles etc. Silent Sound damping elements available from four proven product lines: CRET Silent shear load elements, ARBO Silent cantilever slab elements, RIBA Silent tensile and compression anchors, and NELL Silent supports. dura dura Punching shear and shear reinforcement for significantly enhanced design strength in areas subject to punching shear and shear conditions. Steel shear heads system for assimilating shear and flexural load in slab support zones. 34

35 ORSO ORSO-V Steel / Concrete composite columns and ORSO-B concrete columns meeting the highest static and aesthetic requirements. Nell Movement and deformation supports for linear and localised support conditions. RINO Exo Externally fitted, prestressed steel shear head for retroactive enhancement of punching shear strength in existing slabs. RINO Carbo-S Prestressed carbon fibre reinforced straps for retroactive enhancement of punching shear strength in existing slabs. RINO Flex Carbon fibre reinforced laminate for retroactive enhancement of flexural strength in existing slabs. Engineering Services Our engineers will help you with static tasks and support you in generating customised solutions using proven static design tools. They are thoroughly familiar with our technical products and services, and will be glad to assist you with your specific design situations. Our design programs are based on current SIA codes, greatly simplifying the use of Aschwanden engineering product range. 35

36 For details of individual products please refer to the specific product documentation. Remarks on this document As a result of updated standards and ongoing development of our product range, Aschwanden documentation is subject to change without notice. The currently valid version of this printed document can be found on our website Copyright by F.J. Aschwanden AG CH-3250 Lyss Switzerland Phone Fax info@aschwanden.com EN ISO 9001 zertifiziert/certified More performance. More value.