Weathered Granite Porosity

As an example riebe says saprolite is much like the weathered granite found on the flat areas surrounding the hard granite of vedauwoo.

Weathered granite porosity.

Cores of granite basement show a weathering rind of altered feldspars with the weathered surface displaying the smooth curve that forms. We used geochemical and geophysical measurements. Where volumetric strain dominates over chemical mass loss which was published today sept. Weathering in mountain landscapes creates porosity in rock saprolite and soil near earth s surface through a combination of volumetric strain and chemical mass loss.

The average total porosity determined by the grain density bulk density relation was 25 0. The dg sold as landscaping material is typically composed of fine three eighths inch or smaller particles. Article osti 6116963 title porosity permeability and their relationship in granite basalt and tuff author abstractnote this report discusses the porosity storage and permeability of fractured mainly crystalline rock types proposed as host rock for nuclear waste repositories. Riebe was corresponding author of a paper titled porosity production in weathered rock.

Once plagioclase weathering begins porosity increases significantly and the mass surface fractal typical for unweathered granite transforms to a surface fractal as infiltration of fluids continues. The hydraulic properties of weathered granite at other sites followed the trends observed at our sites implying wide applicability of the findings in this study to various types of weathered granite. Considering that the porosity of the weathered granite increases about four times with reference to the fresh granite the uptake of calcium and sulphate from joint mortars is possible through. Decomposed granite is like gravel but finer and generally more stable.

It s formed from the natural weathering and erosion of solid granite a tough hard igneous rock. Some may be no bigger than a grain of sand. Steinhoff and mell 1924 using 73 cubes of porous refractory material 2 em along the edges found that the bulk volume obtained by micrometer measurement was significantly greater than by mercury displacement. Weathering in the critical zone causes volumetric strain and mass loss thereby creating subsurface porosity that is vital to overlying ecosystems.

Porosity and permeability measurements from 8 8 cm diameter core cylinders can be organized to establish details of exploration and.