Study on Heavy Weight Impact Sound Insulation of CLT Floor Slab and Reduction Performance with Floor Structure

Strategies and challenge for carbon neutrality by 2050 had become important issues all over the world. In South Korea, as a move toward carbon neutrality, interest in wooden buildings is growing continuously. In order to spread the wooden buildings, especially wooden multi-residential buildings, high floor impact sound insulation performance is required. In this study, we investigated the floor impact sound insulation performance of floor slabs with cross laminated timber (CLT) panels produced in South Korea. Moreover, laboratory measurements were conducted to grasp the reduction effect by floor covering. As a result, the heavy-weight impact sound insulation performance of CLT bare slab of its thickness of 150 mm is almost 17 dB lower than that of RC slab according to ISO717-2. Concrete topping and damping material are found to be effective to both heavy and light weight floor impact sound insulation.