Abstract Conventional hydraulic fracturing techniques are often found problematic for extracting geothermal energy in hot dry rock (HDR). As an alternative, employing the less viscous gas to replace water as fluid showed great potential more effective of HDR. In this work, failure behavior and mechanism granite during under different confining pressures injection rates comprehensively examined....

mixed clayey soils occur as mixtures of sand (or gravel) and clay in widely varying proportions. their engineering behavior has not been comprehensively studied yet. an experimental program, comprising monotonic, cyclic, and post-cyclic triaxial tests was undertaken on compacted clay-granular material mixtures, having different proportions of clay and sand or gravel. this paper presents the res...

Concrete made with large-size recycled aggregates is a new kind of concrete, where the size aggregate used 25–80 mm, which generally three times that conventional aggregate. Thus, its composition and mechanical properties are different from concrete can be applied in large-volume structures. In this study, generated two stages randomly distributed gravels mortar was to replace model, observe in...

Stress transmission in realistic granular media often occurs under external load and the presence of boundary slip. We demonstrate how shear strain is localized a split-bottom Couette cell with smooth walls subject to confining pressure.

The disjoining pressure of charged parallel interfaces confining an electrolyte solution is to a large extent determined by the screening clouds of the surface charges. We evaluate the pressure in terms of the number density sigma of discrete charges and film thickness d and find, at sigmad(2) approximately 1, a crossover from the well-known law P approximately sigma(2) to a linear behavior P a...

In geotechnical engineering, the mechanical behavior of rocks under various In-situ conditions (stress state including axial stress, confining pressure, pore water pressure) have always been an important topic. Therefore, pressure effect on permeability and different size sandstone samples a certain condition was studied. The sizes shows roughly same exponential de-creasing law with increase pr...