Use of waste and marginal materials for silent roads
* Presenting author
Inhabitants of the urban environment are exposed to high levels of traffic noise and increase in amounts of waste. One way to mitigate their exposure to noise is to take advantage of the existing public spaces between buildings and transform the available surfaces of pavements into elements that foster comfort and health for urban residents. This work aims to develop low noise pavements by using certain waste materials. Semi-dense asphalt (SDA) mixtures (Air Voids = 12-16%) will be used in this study due to their acoustic properties. Parts of the aggregate matrix will incorporate i) crumb rubber (CR) and ii) recycled concrete aggregates (RCA). The various mixtures produced will be compacted into 100mm dimeter specimens using the gyratory compactor which will be subject to texture measurements by 3D laser profilometry, porosity measure-ments and sound absorption measurements by the impedance tube method (EN 10534-2). This study will give us an understanding on how waste materials impact the texture and acoustic properties of roads and ultimately, to what degree they can be incorporated in low-noise asphalt mixtures.