Examinando por Materia "PAVIMENTOS FLEXIBLES"

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  • Miniatura
    PublicaciónAcceso abierto
    Diseño de mezclas de suelo compactado para la construcción de terraplenes
    (2014-05-08) Aiassa, G. (Gonzalo); Arrúa, P. (Pedro)
    The highways or airfield pavement performance depends on the material behavior in different structural layers of embankment. Generally, economic limitations force to use of in situ available soil as material for pavement construction. The improvement of soil by compaction and mixture with granular or stabilizing material is an adequate strategy. In this work, a study of mechanical behavior of silty-sand soil has been made, and the aptitude of use it as sub-base material has been evaluated. The soil analyzed corresponds to superficial layers in the central region of Argentina (southern zone of Cordoba province). The mechanical characterization has been made in laboratory, with unconfined compression and CBR tests on compacted soil-cement and soil-granular material. The results has shown materials characterization and concluding of the use and performance on compacted soil sub-base pavements construction.
  • Miniatura
    PublicaciónAcceso abierto
    Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica
    (2013-11-27) Reyes-Ortiz, O. J. (Oscar Javier); Rincón, J. F. (John Fredy)
    The main objective of the research was to determine the effect in the indirect tension strength when replacing mineral filler by cement, lime, and ash at different percentages. Materials were first characterized (aggregates, asphalt, lime, cement and fly ash). Then, using the Marshall method, was determined the optimum percentage of asphalt. Gradation m10 and asphalt with penetration 60/70 was chosen for the study, similarly, mineral filler was replaced on the percentages of 0, 25, 50, 75, 100. Strength was increased 58 % by substituting 100 % of mineral filler for lime, from 22 % to replace 50 % filler by fly ash, and 5 % by 75 % replacing cement, were the main findings of this study. In addition, it was found in relation to the deformation test, for all percentages of replacement of lime and cement, the mixture supports higher deformation to the maximum load. Whereas that, for replacement of fly ash, only 100 % replacement of the deformation increased with the maximum load.