METHOD FOR MEASURING THE VOLUME AND DETERMINING THE DENSITY OF POROUS MATERIALS Russian patent published in 2023 - IPC G01F17/00 G01N9/26 

FIELD: porous objects measurements.

SUBSTANCE: method for measuring volumes and determining the densities of porous bodies of arbitrary shape, different moisture content, as well as fractional composition, used in all areas of research or application of porous objects. After weighing, the test body is placed in a sample vessel, which is connected in series through valves to a measuring vessel of the same volume, equipped with an absolute pressure sensor, and a pump that creates a change in pressure of a given value in series, first in the measuring vessel with simultaneous measurement and fixation by the flow meter of the change in air volume, and then, after bypassing the air by opening the valve between the vessels, in both vessels simultaneously with the measurement and fixation by the flow meter of the change in air volume, while the volume of the body is determined by the formula

where V_T is desired volume of the body, P_atm is the value of atmospheric pressure, ΔP is the magnitude of the change in pressure, ΔV is the amount of change in the air volume in the sample vessel, ΔV₂ is the magnitude of the change in the air volume in the measuring vessel; and the density of the studied porous body is determined by the formula

The use of this method will improve the accuracy and reliability of measuring the volume and determining the density of porous bodies of arbitrary shape, different humidity and fractional composition.

EFFECT: increase in the accuracy of measuring the volume and determining the density of porous bodies of arbitrary shape, different humidity and fractional composition.

1 cl, 1 dwg