Sustainable Low-noise Pavements Built with Waste Tyre Rubber and Warm Mix Additives

The innovative sustainable low-noise pavements are built with waste tyre rubber, warm mix additives, conventional bitumen and small-sized aggregates. The mixture of gap-graded bituminous and small-sized aggregates is specially designed which can strengthen the structure of the pavement, enhance its durability and reduce noise pollution. The warm mixing additive can reduce the temperature required for material mixing and compaction, lowering energy consumption and emission during the paving process, thereby reducing the air pollution and nuisance caused to the environs. The tyre-road noise of sustainable low-noise pavements is 3 decibels (dB) lower than that of conventional asphalt pavements.