Weathered Granite Porosity

18 in science advances an offspring publication of science.

Weathered granite porosity. Weathering in the critical zone causes volumetric strain and mass loss thereby creating subsurface porosity that is vital to overlying ecosystems. The average total porosity determined by the grain density bulk density relation was 25 0. 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. As an example riebe says saprolite is much like the weathered granite found on the flat areas surrounding the hard granite of vedauwoo.

The dg sold as landscaping material is typically composed of fine three eighths inch or smaller particles. 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. 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. Cores of granite basement show a weathering rind of altered feldspars with the weathered surface displaying the smooth curve that forms.

The c m class bedrock cores had almost no effective porosity i e the amount of porosity that effectively contributes to water flow. Where volumetric strain dominates over chemical mass loss which was published today sept. Riebe was corresponding author of a paper titled porosity production in weathered rock. Porosity and permeability measurements from 8 8 cm diameter core cylinders can be organized to establish details of exploration and.

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. 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 mountain landscapes creates porosity in rock saprolite and soil near earth s surface through a combination of volumetric strain and chemical mass loss. Some may be no bigger than a grain of sand.

It s formed from the natural weathering and erosion of solid granite a tough hard igneous rock.