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US 4,179,916 AGranted
Method of and a device for measuring the pressure and abrasion sensitivity of granular material (grain lots) due to mechanical stress
OwnerWilhelm Konnerthinventor
Life of this patent
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Abstract
A method of measuring the pressure and abrasion sensitivity of granular material is disclosed wherein the mechanical stress is produced by an abrupt exposure of the grains of a representative sample, in a closed mortar, to a gas-pressure wave of high kinetic energy.
Claims28
A method of measuring the pressure and abrasion sensitivity of granular material in a closed mortar comprising exposing said material to a mechanical stress;
- and,
- comparing the variation of the weight proportions of the individual grain-size fractions of said granular material due to said stress in comparison to corresponding initial values of a representative sample of granular material, by screening analyses, including producing said mechanical stress by an abrupt exposure of the grains of said representative sample in said closed mortar to a gas-pressure wave of high kinetic energy.
A device for measuring pressure and abrasion sensitivity of granular material which comprises:
- means for applying stress to said material;
- screening analysis means for comparing the variation of the weight proportions of individual grain-size fractions of said material due to said stress in comparison to corresponding initial values of a representative sample;
- and
- a mortar including a main body and one or more cavities, wherein the inner surface of said one or more cavities differs from the remaining material of said mortar body with respect to surface structure, material composition and physical and chemical properties thereof.
1 more element
A method of measuring the pressure and abrasion sensitivity of granular material in a closed mortar comprising:
- exposing said material to mechanical stress;
- and,
- comparing the variation of the permeability to gas of the material exposed to mechanical stress to that of corresponding initial values of a representative sample as a standard of pressure sensitivity and abrasion sensitivity including producing said mechanical stress by an abrupt exposure of the grains of said representative sample in said closed mortar to a gas-pressure wave of high kinetic energy.
Dependencies are inferred from the claim text.