Contribution
Influence of construction details on impact sound insulation of timber-concrete composite (TCC) floors
* Presenting author
Abstract:
Timber-concrete composite (TCC) floors are hybrid elements combining the advantages of the materials wood and concrete, resulting in an optimized floor system for multi-storey buildings. Besides the ecological advantages of TCC-floors, other benefits for the building sector are a high degree of prefabrication and the realisation of high spans. The connection between the cross laminated timber (CLT) and the concrete element above must withstand the resulting shear forces. To transfer them, different connections like bolts, screws, birdsmouths, metal sheets or a combination of these are realised. Currently, planners and builders of multi-storey buildings are facing research gaps regarding TCC-elements, especially when it comes to the acoustic performance of such elements. In this work, a variation study was conducted in the laboratory to evaluate the impact of sound insulation in accordance with EN ISO 10140-3. Additionally, the maximum sound pressure level achieved by excitation with the rubber ball was measured. The varied constructions include different screed floors, heights of filling and suspended ceilings. All measurements were performed down to 25 Hz. The differences in the low frequency range and the influence of different construction details on the impact sound insulation will be discussed in this article.