TYRE NOISE

Noise + Noise walls, - Possibly traffic - Possibly traffic ++ Local or temporal + Quiet engines, tyres... 

OGFCs may also be placed to reduce the tyre-pavement interface noise and may also be placed to reduce the occurrence and severity of reflective cracking. 

The pavement surface characteristics affect not only driving safety and comfort but also the environmental pollution (mainly noise) and the vehicle operating cost (maintenance cost, tyre replacement cost, wasted fuel cost). 

In the construction of vehicles, safety features include the provision of suitable braking systems burst-proof door latches and hinges material for fuel tanks types of lamps and reflectors the fitting of audible warnings, mirrors, safety glass windscreens, seat belts acceptable tyres, the driver s view of the road and the lighting of vehicles. Noise and smoke emissions are also topics related to safety and covered by the legislation. 

Tread. Tread is the wear resistance component of the tyre and is in direct contact with the road. It must provide traction, wet skid and good cornering characteristics with minimum noise generation and also low heat build-up. Tread components can consist of blends of NR, polybutadiene (BR) and SBR, compounded with carbon black, silica, oils and vulcanizing chemicals." Among recently reported formulations for tyre tread with economic and environmental merits is the work of Rattanasom, in which a blend of NR and tyre tread reclaimed rubber (RR) was prepared and mechanically characterized. Their results showed that the blends prepared with different curing systems, i.e. conventional vulcanization (CV) and efficient vulcanization (EV), exhibit an increase in their hardness and modulus with increasing RR content, while other mechanical properties were adversely affected. ... 

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