چكيده لاتين :
ABSTRACT: The cyclic resistance along with pre and postliquefaction
behavior of mixtures of a saturated sand with varying
amounts of a nonplastic silt are evaluated by cyclic triaxial tests,
performed on undisturbed samples retrievedfrom calibration chamber
and reconstituted samples prepared in laboratory utilizing dry pluviation
method. Test results exhibit a clear trend between cyclic resistance and
fines content in undisturbed specimens. The same trend is found in
reconstituted specimens but with more scattering. Regardless offines
content, dilative behavior is observed in both types ofspecimens prior
to liquefaction. Monotonic tests on reconstituted specimens also reveal
the existence of dilative behavior. Indeed, increasing fines content
would increase the post-liquefaction volumetric strain. The results of
laboratory tests are also compared with cone penetration test (CPT)
results. It is shown that strength reduction in CPT is much more than
triaxial tests, when silt content is raised. Hence, fines tend to increase
cyclic resistance ratio for the same normalized cone penetration
resistance.
