Ali Firat Cabalar (Author), M. M. Khalaf (Author), Z. Karabash (Author)

Abstract

Bender-element (BE) tests were conducted on clay-sand mixtures to investigate the variation of small strain-shear modulus (Gmax) with the sand content and the physical characteristics (size, shape) of the sand grains in the mixtures. Three different gradations (0.6–0.3 mm, 1.0–0.6 mm and 2.0–1.0 mm) of sands having distinct shapes (rounded, angular) were added to a low-plasticity clay with mixture ratios of 0% (clean clay), 10%, 20%, 30%, 40%, and 50%. For the purposes of performing a correlation analysis, unconfined compression (UC) tests were also carried out on the same specimens. The tests indicated that both the Gmax and unconfined compressive strength (q u) values of the specimens with angular sand grains were measured to be lower than those with rounded sand grains, for all sizes and percentages. As the percentage of sand in the mixture increases, the Gmax values increase, while the qu values decrease. The results further suggested that the Gmaxvalues decrease as the q u values decreases as the size of the sand grains reduces.

Keywords

sand;clay;bender element;unconfined compressive strength;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UM FGPA - Faculty of Civil Engineering, Transportation Engineering and Architecture
UDC: 624.13.041.6
COBISS: 305145088 Link will open in a new window
ISSN: 1854-0171
Parent publication: Acta geotechnica Slovenica
Views: 1117
Downloads: 216
Average score: 0 (0 votes)
Metadata: JSON JSON-RDF JSON-LD TURTLE N-TRIPLES XML RDFA MICRODATA DC-XML DC-RDF RDF

Other data

Secondary language: Slovenian
Secondary title: Določitev strižnega modula glineno peščenih mešanic s preizkusom z benderjevim elementom
Secondary abstract: Na glineno peščenih mešanicah so bili izvedeni preizkusi z benderjevim elementom (BE). Z njimi se je raziskalo spreminjanje strižnega modula majhnih deformacij (Gmax) v odvisnosti od vsebnosti peska in fizikalnih karakteristik zrn peskov (velikosti, oblike) v preiskovanih mešanicah. Tri različne granulacije peskov (0.6-0.3 mm, 1.0-0.6 mm in 2.0-1.0 mm) s posebnimi oblikami (okrogle, oglate) so bile dodane malo stisljivi glini v deležih 0 % (čista glina), 10 %, 20 %, 30 %, 40 % in 50 %. Za korelacijsko analizo so bili na enakih vzorcih izvedeni tudi enoosni preizkusi tlačne trdnosti (UC). Preizkusi so pokazali, da so izmerjene vrednosti za G max in enoosno tlačno trdnost (qu) preizkušancev z oglatimi zrni peska nižje kot za okrogla zrna peska, in sicer za vse velikosti in razmerja mešanja. Z naraščanjem vsebnosti peska v mešanicah, narašča vrednost Gmax, medtem, ko vrednost qu upada. Rezultati nadalje kažejo, da tako vrednosti Gmax, kot tudi vrednosti q u upadajo z zmanjšanjem velikosti zrn peska.
Secondary keywords: geotehnika;pesek;glina;benderjev element;enoosna tlačna trdnost;
URN: URN:SI:UM:
Type (COBISS): Scientific work
Pages: str. 2-15
Volume: ǂVol. ǂ15
Issue: ǂ[no.] ǂ1
Chronology: 2018
DOI: 10.18690/actageotechslov.15.1.3-15.2018
ID: 10977271