Influence of Suction on the Properties of two Granular Road Materials

Authors

  • O. Coronado Ecole Centrale Paris, Châtenay-Malabry, France
  • Jean-Marie Fleureau Ecole Centrale Paris, Châtenay-Malabry, France
  • A.G. Correia Universidade do Minho, Guimarães, Portugal
  • B. Caicedo Universidad de los Andes, Bógota, Colombia

Keywords:

Roads, Unsaturated unbound materials, Modulus

Abstract

The results of an experimental work on two road granular materials are presented, including small strains precision triaxial tests under cyclic loading, large strains triaxial tests with measurement of the negative pore water pressure (suction) and wetting tests. The influence of different initial conditions of density, water content and fines content was studied. The two materials differ by their fine contents (7 % for MHC and 10% for HFC). The specimens are compacted at different water content and at a density corresponding to 97% of the Modified Proctor
maximum density. The interpretation of the results, in the quasi-elastic domain, is based on an effective stress analysis that allows to take into account both the effects of total stresses and negative pressure, in the perspective of a more rational design of pavement layers.

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Published

2019-08-01

Issue

2005: Proceedings Seventh International Conference on the Bearing Capacity of Roads, Railways and Airfields

Section

Articles