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Date of Publication:2022-10-06

Journal:武汉理工大学学报

Volume:33

Issue:6

Page Number:93-98

ISSN No.:1671-4431

Abstract:To verify the applicability of the theory of critical state on the fly
   ash material,a series of tests are carried out using GDS triaxial
   testing machine,which is equipped with the triaxial digital image
   deformation measurement system.CD triaxial compression tests are
   performed on two different types of specimens(drying and saturated).The
   stress-strain relationships of two types of specimens are
   analyzed,especially,the critical state characteristics and the
   influencing factors of critical state of the saturated fly ash are
   focused on.The evolutions of the surface deformation for specimen with
   different initial density over the process of reaching the critical void
   ratio are obtained.The influence of the relative density on the
   stress-strain behavior of the fly ash is discussed.The dense sand will
   show a strain softening behavior,while the loose sand will show a strain
   hardening behavior.

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