The interface friction between geosynthetics has previously been extensively studied with reference to medium-high contact stresses. strength at low stress is a less investigated chapter whose importance, however, evident for the stability of geosynthetic landfill barriers during construction stage and covering systems. inclined plane most used laboratory test measuring normal stresses as 5 kPa...

This investigation was aimed at studying the effect of test methods on bond strength between concrete substrate and repair material. Four test methods with cementations or modified-cementations repair materials, and two surface roughnesses were studied. The methods used were pull-off, slant shear, splitting prism and a new direct shear named Bi-Surface shear test. While the coefficient of varia...

The hybrid failure is a coupled mechanism under the action of tensile and shear stresses. critical in cemented paste backfill (CPB) since there are no visible signs prior to failure. Few studies have been conducted on stress response CPB. This most likely due lack suitable laboratory equipment test procedures. paper presents new punching apparatus evaluate We harness two-dimensional finite elem...

The morphology of the joint interface is described using geostatistical parameters such as the sill, range and slope of the initiaI part of the variogram. The methodology is also used to identify the scale effect and to determine the appropriate cutoff length of the sample which is representative for a direct shear test. The anisotropy characteristics of the interface are described using the si...

BACKGROUND Recent studies have suggested that electroencephalogram (EEG) bispectral index (BIS) monitoring can improve recovery after anaesthesia and save money by shortening patients' postoperative stay. We wanted to evaluate the direct costs of BIS monitoring and to measure immediate recovery after anaesthesia in patients with or without BIS monitoring. METHODS Eighty patients undergoing gy...

A new simple shear apparatus is fabricated which is capable of applying monotonic and cyclic load on soil specimens. A series of tests was conducted to study the pore pressures (or suction), volume change, and shear behavior of the soil samples with anisotropic consolidation pressure. The simple shear apparatus is capable of controlling as well as measuring pore-air and pore-water pressure in t...