Question

what is porous rock​

Answer 1

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Porous stones are porous rock Most sandstone based rock and some carbonate based sedimentary rocks have the intrinsic characteristics of being internally structured with linked-porosity across the rock matrix. For flow to occur, the rock should be not only porous, but a level of linkage between the porosity spaces that connect the rock must be present. Thus in these rocks, water can seep / flow, depends on pressure difference and the degree to which the internal structure allows flow, known as the rock's permeability. Fluid flow in a given rock having both porosity & permeability varies according to the fluid considered for flow; For thin, low viscosity fluids the flow rate is greater than that for thick, high viscosity liquids. Fluid flow for gasses through the rock matrix is less restrictive than it is for liquids.

Metamorphic rocks and some igneous rocks (excluding pumice and scoria) are typically denser and have significantly less permeability, thus liquid flowability is often nil.

Gas is still available on the path of the rock matrix. Gas, specifically the hydrogen (the smallest atomic size) can penetrate all but very thick steel (> 8 to 15 cm thick). A condition known as hydrogen embrittlement will decrease and crack hard steel due to hydrogen diffusion in the metallic structure. A similar example of gas penetrating is impermeable material is the rise of radon gas from deep within the earth in home basement structures, where they can accumulate.

Answer 2

Porous stones are porous rock Most sandstone based rock and some carbonate based sedimentary rocks have the intrinsic characteristics of being internally structured with linked-porosity across the rock matrix. For flow to occur, the rock should be not only porous, but a level of linkage between the porosity spaces that connect the rock must be present. Thus in these rocks, water can seep / flow, depends on pressure difference and the degree to which the internal structure allows flow, known as the rock's permeability. Fluid flow in a given rock having both porosity & permeability varies according to the fluid considered for flow; For thin, low viscosity fluids the flow rate is greater than that for thick, high viscosity liquids. Fluid flow for gasses through the rock matrix is less restrictive than it is for liquids.

Metamorphic rocks and some igneous rocks (excluding pumice and scoria) are typically denser and have significantly less permeability, thus liquid flowability is often nil.

Gas is still available on the path of the rock matrix. Gas, specifically the hydrogen (the smallest atomic size) can penetrate all but very thick steel (> 8 to 15 cm thick). A condition known as hydrogen embrittlement will decrease and crack hard steel due to hydrogen diffusion in the metallic structure. A similar example of gas penetrating is impermeable material is the rise of radon gas from deep within the earth in home basement structures, where they can accumulate.