Volume Change Measurement in Triaxial Tests by Monitoring Cell Fluid Volume Based on Viscoelastic Behavior of the Test Setup
Artikel i vetenskaplig tidskrift, 2017

A novel procedure was developed to measure the total volume change of the unsaturated soils in triaxial testing. The principle of the proposed method was based on cell fluid volume measurements corrected by the assumption of viscoelastic behavior for the triaxial setup. Calibration and parameter determination procedures of the model are devised, and the presented model is implemented into a MATLAB code. The proposed method was validated through a series of consolidated drained triaxial tests on saturated specimens, by comparing the changes in volume measurement of proposed method and conventional measurement (pore fluid). The accuracy in volume measurement during consolidation and shear stages of these tests was between 0.09 and 0.32 cm3, which is on par with or better than more complex and expensive alternatives found in the literature. Repeatability of the proposed technique in measurement of the volume change was also investigated through a series of suction controlled unsaturated soil tests.

Burgers model

unsaturated soil

volume change measurement

triaxial test

viscoelasticity

Författare

Reza Ahmadi-Naghadeh

Chalmers, Bygg- och miljöteknik, Geologi och geoteknik

Geotechnical Testing Journal

0149-6115 (ISSN)

Vol. 40 4 683-697

Ämneskategorier

Geoteknik

Styrkeområden

Materialvetenskap

DOI

10.1520/GTJ20160093

Mer information

Skapat

2018-09-29