Geomembrane-geotextile interface shear properties as determined by inclined board and direct shear box tests

Date

2001-01-01

Author

Wasti, Y
Ozduzgun, ZB

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

88
views

0
downloads

Geomembrane-geotextile interface shear strength parameters were measured using inclined board (tilting table), standard size (60 mm x 60 mm) and large-scale (300 mm x 300 mm) direct shear box tests. Smooth and rough HDPE, PVC geomembranes and nonwoven needle-punched geotextiles were used in the experiments. Inclined board tests were conducted under a normal stress range of about 5-50 kPa on variable size interface areas. In direct shear tests the applied normal stresses were about 25-300 kPa and 110-400 kPa in the small and large size tests, respectively, The interface friction angle and adhesion intercept values obtained by fitting a straight line through the plots of interface shear strength versus the normal stress were compared for different tests. It has been found that inclined board test results produce envelopes with relatively small adhesion values for both smooth and rough HDPE geomembrane-geotextile interfaces. The size of the interface does not appear to be a significant factor. For smooth geomembranes direct shear and inclined board tests give comparable interface friction angle and adhesion values. For rough geomembranes, however, the direct sheer adhesion values are markedly higher and friction angle values are a few degrees higher when compared to the inclined board test results.

Subject Keywords

Geomembrane, Geotextile, Inclined board test, Shear box, Interface shear

URI

https://hdl.handle.net/11511/65854

Journal

GEOTEXTILES AND GEOMEMBRANES

DOI

https://doi.org/10.1016/s0266-1144(00)00002-9

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

Ultrahigh-Dynamic-Range Resonant MEMS Load Cells for Micromechanical Test Frames Azgın, Kıvanç; Akın, Tayfun (2012-12-01) This paper presents a resonant double-ended tuning fork (DETF) force sensor with an experimentally demonstrated resolution of 7 nN and a compressive load range of 0.08 N, exceeding a dynamic range of 140 dB (100 parts per billion). The resonator has a scale factor of 216 kHz/N, a Q-factor exceeding 60 000 at 3-mtorr ambient pressure, and a zero-load resonant frequency of 47.6 kHz. The resonator is kept at resonance via a phase-locked loop composed of discrete elements. The sensor is implemented with a silic...
Metric scale and angle estimation in monocular visual odometry with multiple distance sensors Ölmez, Burhan; Tuncer, Temel Engin (2021-10-01) In this paper, a novel approach is presented to estimate the metric scale (MSC) and roll and pitch angles of a platform by using distance sensors in a monocular visual odometry setup. A state-of-the-art visual odometry algorithm Semi-Direct Visual Odometry (SVO) [1] is used to obtain sparse three dimensional (3D) point cloud which is then matched with the measurements obtained from the distance sensors for the estimation process. Metric scale with Kalman (MSCwK) filter approach is presented where the metric...
Performance of solar cells fabricated on black multicrystalline Si by nanowire decoration Es, Fırat; Çiftpınar, Emine Hande; Demircioğlu, Olgu; Günöven, Mete; Kulakci, Mustafa; Turan, Raşit (2015-03-30) Vertically aligned Si nanowire (NW) arrays fabricated by metal-assisted etching technique were applied to industrial sized (156 mm x 156 mm) multicrystalline Si cells as an anti-reflective (AR) medium. The NW lengths (between 0.15 and 2.2 mu m) were controlled by etch duration from 5 to 50 min. A completely black surface could be observed, demonstrating excellent AR properties in the entire range of the solar spectrum, even without additional anti-reflective coating layer (e.g., SiNx:H). Standard Si solar c...
Circumferential Traveling Wave Slot Array on Cylindrical Substrate Integrated Waveguide (CSIW) Bayraktar, Omer; Aydın Çivi, Hatice Özlem (Institute of Electrical and Electronics Engineers (IEEE), 2014-07-01) Traveling wave slot array on cylindrical substrate integrated waveguide (CSIW) is designed, fabricated and measured at K-band. CSIW is formed by wrapping the substrate integrated waveguide (SIW) around the cylinder in the circumferential direction. 16 element longitudinal slot array on the broad wall of single CSIW is designed by the Elliot's design procedure. The spacings between the slot elements are determined to reduce the half power beam width (HPBW) and to obtain good matching at 25 GHz. A 4 x 16 slot...
Elliptical pin fins as an alternative to circular pin fins for gas turbine blade cooling applications part 1 endwall heat transfer and total pressure loss characteristics Uzol, Oğuz (null; 2001-06-07) Detailed experimental investigation of the wall heat transfer enhancement and total pressure loss characteristics for two alternative elliptical pin fin arrays is conducted and the results are compared to the conventional circular pin fin arrays. Two different elliptical pin fin geometries with different major axis lengths are tested, both having a minor axis length equal to the circular fin diameter and positioned at zero degrees angle of attack to the free stream flow. The major axis lengths for the two e...

Citation Formats

Y. Wasti and Z. Ozduzgun, “Geomembrane-geotextile interface shear properties as determined by inclined board and direct shear box tests,” GEOTEXTILES AND GEOMEMBRANES, pp. 45–57, 2001, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/65854.