Communication Dans Un Congrès Année : 2020

Accelerated pavement testing for the evaluations of structural design and safety performance of an innovative road coating

Résumé

Pervious concrete use has increased since more than a decade thanks to its main feature of high water permeability. However the use of this material is still limited to light traffic areas, like car parks or walkways in urban areas. Recently LafargeHolcim Research Center has developed an innovative concept of concrete pavement structure using this type of material for heavy traffic highways. An ultrathin innovative pervious concrete layer is laid directly (wet on wet) on top of an optimized concrete layer just after its placement. This innovative solution allows ensuring both structural performance and surface characteristics for road users in terms of safety, riding comfort and aesthetic. In order to evaluate the actual performance of this innovative pavement structure, an accelerated pavement test (APT) was carried out using the FABAC heavy traffic simulator of IFSTTAR in Nantes. A total of five million cycles of 6.5 tons half-axle load were applied. Structural performance and lifetime of the pavement were evaluated by comparison with a design process using the French-standard-design-software called Alizé-LCPC. The evaluation of the bonding strength at the interface between the pervious wearing course and the structural concrete bottom layer showed good durability throughout the entire test, which could allow possible consideration of the surface layer in the whole pavement design process. Finally, dynamic friction tests conducted on the innovative wearing course during the APT allowed to evaluate and predict the evolution of its skid resistance throughout the pavement lifetime.

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Dates et versions

hal-04373356 , version 1 (05-01-2024)

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Mai Lan Nguyen, Pierre Hornych, Minh Tan Do, Thierry Sedran, Duc Tung Dao. Accelerated pavement testing for the evaluations of structural design and safety performance of an innovative road coating. 6th International Conference on Accelerated Pavement Testing, Apr 2022, Nantes, France. pp.186-195, ⟨10.1007/978-3-030-55236-7_20⟩. ⟨hal-04373356⟩
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