A new isotropic specimen preparation method from slurry for both saturated and unsaturated triaxial testing of a low-plasticity silt
2019 (English) In: ASTM geotechnical testing journal, ISSN 0149-6115, E-ISSN 1945-7545, Vol. 42, no 4, p. 854-879Article in journal (Refereed) Published
Abstract [en]
A new procedure for the preparation of low-plasticity silt specimens that are isotropically reconstituted from slurry is developed for use in both saturated and unsaturated soil testing. Spatial variations of the water content and grain size distribution were examined to confirm the uniformity of the specimens (regarding void radio and segregation). The new preparation method results in a homogeneous specimen, which has a simple stress history. The repeatability of the proposed method in preparing identical specimens was verified for both saturated and unsaturated soil testing. The strength and volumetric behavior of specimens prepared by the introduced method are compared with those of moist-tamped compacted specimens and one-dimensionally reconstituted slurry specimens by performing consolidated drained triaxial tests. The microstructure of the specimens prepared with different methods was examined using Scanning Electron Microscopy and Mercury Intrusion Porosimetry. The test results indicate that silt specimens could exhibit either dilative or contractive behavior at normal consolidated conditions, depending on the microstructure.
Place, publisher, year, edition, pages ASTM International, 2019. Vol. 42, no 4, p. 854-879
Keywords [en]
Mercury intrusion porosimetry, Scanning electron microscope, Silt, Slurry, Specimen preparation, Triaxial test, Unsaturated soil, Grain size and shape, Microstructure, Plasticity, Scanning electron microscopy, Slurries, Soil testing, Unsaturated polymers, Consolidated drained, Grain size distribution, Saturated and unsaturated soils, Specimen preparation method, Unsaturated triaxial testing, Volumetric behavior, Plasticity testing, numerical method, size distribution, soil test
National Category
Geotechnical Engineering and Engineering Geology
Identifiers URN: urn:nbn:se:hj:diva-56116 DOI: 10.1520/GTJ20170269 ISI: 000483194500002 Scopus ID: 2-s2.0-85064563942 OAI: oai:DiVA.org:hj-56116 DiVA, id: diva2:1648099
2022-03-292022-03-292025-02-07 Bibliographically approved