REFLEX CRACKING IN ASPHALT COURSES

LA FISURACION REFLEJA EN LAS CAPAS ASFALTICAS

This type of local cracking received its name because it occurs in every discontinuity of a generally rigid base concrete, cemented granular mixture etc. Its importance is emphasized because of the number of bituminous pavements laid on existing older pavements. This paper shows the inconveniences produced by these types of surface failure; among their causes, special importance is assigned to horizontal contractor of the base in response to temperature changes; the stresses are transferred to the bituminous layer because of adhesion, subjecting it to periodic critical stretching. A theoretical study is made of the rheological behavior of asphaltic mixtures and binders for varied temperature states and loading times, relating them to the above mentioned stresses and analyzing deformation distribution in the thickness of an elastic plate subjected to stress from its lower part. Samples are subjected to transverse compression tests during which strains and their corresponding deformations, introducing changes in standard concretes steel reinforcement included are recorded and their effect assessed. Adherence tests between concrete and an asphaltic granular base were also carried out, under different contact area conditions. The results were used for a quantitative evaluation and to assess the importance of the concurrent causes. Conclusions on the prevention or alleviation of this type of cracking and on its effect on road efficiency are stated; the author suggests a broad economical and technical revision to select the best design for rigid pavement reconstruction. For the covering abstract of the conference, see IRRD Abstract No. 207931. /TRRL/

  • Authors:
    • Francesio, C
  • Publication Date: 1971

Language

  • Spanish

Media Info

Subject/Index Terms

Filing Info

  • Accession Number: 00082766
  • Record Type: Publication
  • Source Agency: Transport and Road Research Laboratory (TRRL)
  • Report/Paper Numbers: Conf Paper
  • Files: ITRD, TRIS
  • Created Date: Jul 15 1975 12:00AM