Amélioration de la durabilité des SDA phonoabsorbants grâce à une optimisation multi-échelle

• Unité de recherche: OFROU RPT
• Numéro de projet: TRU_20_01D_01
• Titre du projet anglais: Improving the durability of low-noise SDA through a multi-scale optimization

Mots-clé (Allemand)

Noise; Pavements; Acoustic Durability; Mechanical Durability

Mots-clé (Anglais)

Noise; Pavements; Acoustic Durability; Mechanical Durability

Description succincte (Allemand)

The unique multi-scale optimization approach proposed herewith utilizes the advantages of laboratory testing at different scales and connects the improved durability characteristics of low-noise SDA to their performance on real roads. In a first step, SDA 4, SDA 6 and SDA 8 are characterized regarding their multi-scale properties in the lab as well as their long-term performance on roads as a reference. The former is done using a range of multi scale laboratory tests (e.g. electron microscopy, computed tomography (CT), fatigue testing) as well as  unique large-scale durability testing capability (e.g. traffic simulator MMLS3). The latter is done using acoustic measurements of the around 500 SDA pavements installed in Switzerland. The core of this proposal constitutes two sequential optimization cycles that are undertaken at the material and mixture property level before the optimized samples are subjected to largescale durability testing using the traffic load simulator MMLS3 amongst other stress tests. Both optimization cycles involve substantial acoustical and mechanical performance testing undertaken by the three partners. The optimizations will be translated into expected improvements regarding the acoustic and mechanical durability of low-noise SDA on real roads, if applied. The outcome of the proposed project will provide the basis for an improved durability of low-noise SDA which can be directly applied by the industry and incorporated in nation-al standards.

Description succincte (Anglais)

The unique multi-scale optimization approach proposed herewith utilizes the advantages of laboratory testing at different scales and connects the improved durability characteristics of low-noise SDA to their performance on real roads. In a first step, SDA 4, SDA 6 and SDA 8 are characterized regarding their multi-scale properties in the lab as well as their long-term performance on roads as a reference. The former is done using a range of multi scale laboratory tests (e.g. electron microscopy, computed tomography (CT), fatigue testing) as well as  unique large-scale durability testing capability (e.g. traffic simulator MMLS3). The latter is done using acoustic measurements of the around 500 SDA pavements installed in Switzerland. The core of this proposal constitutes two sequential optimization cycles that are undertaken at the material and mixture property level before the optimized samples are subjected to largescale durability testing using the traffic load simulator MMLS3 amongst other stress tests. Both optimization cycles involve substantial acoustical and mechanical performance testing undertaken by the three partners. The optimizations will be translated into expected improvements regarding the acoustic and mechanical durability of low-noise SDA on real roads, if applied. The outcome of the proposed project will provide the basis for an improved durability of low-noise SDA which can be directly applied by the industry and incorporated in nation-al standards.

Objectifs du projet (Allemand)

Semi Dense Asphalt pavements have been one of the most effective noise abatement measures. However, there is an urgent need to optimize their mechanical and acoustic durability in order to make such solutions cost effective in their life cycle. The research objectives of the project are to improve the acoustic and mechanical durability of SDA 8, SDA 6 and SDA 4 by optimizing and adapting the mixtures to different traffic and climatic conditions present on the Swiss national and main road network using a multi scale approach. A unique multi-scale optimization approach is proposed that utilizes the advantages of laboratory testing at different scales from microstructure to durability under the traffic simulator and connects the improved durability characteristics of low-noise SDA to their performance on real roads obtained through an extensive data bank containing acoustic performance of 500 Swiss test sections.

Objectifs du projet (Anglais)

Semi Dense Asphalt pavements have been one of the most effective noise abatement measures. However, there is an urgent need to optimize their mechanical and acoustic durability in order to make such solutions cost effective in their life cycle. The research objectives of the project are to improve the acoustic and mechanical durability of SDA 8, SDA 6 and SDA 4 by optimizing and adapting the mixtures to different traffic and climatic conditions present on the Swiss national and main road network using a multi scale approach. A unique multi-scale optimization approach is proposed that utilizes the advantages of laboratory testing at different scales from microstructure to durability under the traffic simulator and connects the improved durability characteristics of low-noise SDA to their performance on real roads obtained through an extensive data bank containing acoustic performance of 500 Swiss test sections.

No du rapport (Allemand)

1788

Documents annexés

• TRU_20_01D_01 (Schlussbericht Nr 1788) [PDF] 8'063 kB