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The performance of aggregates in a single surface dressing, subjected to wear by studded tyres

Comportement de granulats en enduits superficiels soumis a l'action de pneus a crampons

  • International Symposium on Aggregates
  • Theme IV Aggregates for Pavements
  • Published:
Bulletin of the International Association of Engineering Geology - Bulletin de l'Association Internationale de Géologie de l'Ingénieur Aims and scope Submit manuscript

Abstract

In Sweden, studded tyres cause considerable wear on road surfacings. The properties of aggregates are known to be of importance, but lack of experience with road conditions has prevented relevant specifications.

The performance of nine aggregates—in a single surface dressing—has been studied by means of small test surfacings in road E4. The flakiness of two of the aggregates was varied, too. The change of the texture depth was determined with the aid of a laser profilometer and sand-patch measurements. The former is considered to give more reliable results. After two years in service, the test surfaces have been rated by an expert panel and aggregate samples have been removed from the road after heating the binder. The changes in grading and flakiness have been analyzed.

The macrosurface depths after two years and the changes of that property, not considering the first summers change, because of particle orientation and embedment going on, correlates well with the Swedish aggregate abrasion value. Also, the flakiness of the worn aggregates and reduction of that property in the road, due to traffic wear, correlate. The aggregate impact value does not correlate. However, a fair relationship exists with the aggregate crushing in the road. Obviously, most of these particles, that have been crushed by traffic stresses, can go on functioning in the surface dressing. The condition is, however, that a proper aggregate-binder adhesion exists. The aggregate flakiness is also of importance mainly as it determines the “particle layer height” of the road surfacing. A lack in the abrasion property of an aggregate can partly be compensated by improving the flakiness.

Résumé

En Suède, les pneus à crampons usent fortement la surface des chaussées.

On a étudié l'évolution de 9 granulats utilisés en enduits superficiels sur de petites planches expérimentales. Des mesures ont été faites: profilomètre à laser et hauteur au sable. Après 2 ans de trafic on a extrait les gravillons pour mesurer l'évolution de la forme et de la granularité.

L'essai suédois d'abrasion se corrèle bien avec les résultats de ces constatations, ce qui n'est pas le cas de la fragmentation dynamique.

La forme des gravillons joue un rôle important et une faible résistance à l'abrasion peut être en partie compensée par des gravillons plus cubiques.

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References

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Authors and Affiliations

  1. Skånska Cementgjuteriet, Box 49, S-123 51, Farsta

    Backman Christer

  2. Swedish Road and Trafic Research Institute (VTI), Fack, 58101, Linköping, Sweden

    Höbeda Peet

Authors
  1. Backman Christer
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  2. Höbeda Peet
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Christer, B., Peet, H. The performance of aggregates in a single surface dressing, subjected to wear by studded tyres. Bulletin of the International Association of Engineering Geology 30, 11–16 (1984). https://doi.org/10.1007/BF02594270

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  • DOI: https://doi.org/10.1007/BF02594270

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