Noise reducing pavements - State of the art in Denmark

摘要: Noise is one of the most serious environmental problems caused by road traffic.About 28 % all Danish homes are exposed to more than 55 dB, which official recommended noise limit for traffic noise.The government has a long-term goal reduce level that considered satisfactory health.Ac-cording national strategy, cost-effective means abatement use noise-reducing pavements.In this report, on-going research develop and test different types pavements presented discussed.Single-layer porous with high built-in air void small maximum aggregate size have been tested on highway speed-limit 80 km/h.Over structural lifetime, reduction was 3-4 dB relative dense asphalt concrete 12 mm.In order achieve same reduction, volume should be reduced 50 %.On an urban km/h, similar single-layer tested.Here, observed 3 disappeared within 2 years, because pores pavement were clogged.Three new two-layer now being speed km/h.These designed constructed avoid clogging improve durability.The cleaned special equipment using water under pressure twice year.After four reductions approximately measured compared 8 application, testing kinds thin surface layers started in framework EU project (SILVIA).