METHOD AND DEVICE FOR MEASURING THE VOLUME AND DETERMINING THE DENSITY OF POROUS MATERIALS Russian patent published in 2021 - IPC G01F17/00 G01N9/26 

FIELD: measuring techniques.

SUBSTANCE: invention relates to a technique for measuring volumes and determining the density of porous bodies of arbitrary shape, different moisture content, as well as fractional composition and can be used in all areas of research or application of porous objects. To implement the method, a device is used containing a pneumatic pump connected by means of a valve to a measuring container, which in turn is connected through a bypass valve to a container for samples of a similar volume, and for measuring and recording parameters, instead of a pressure gauge, a flow meter is additionally included in the system between the pneumatic pump and the measuring vessel, and the pneumatic pump can create both overpressure and vacuum in the measuring system. The volume of the body is calculated by the equation of a straight line , obtained by constructing a calibration graph, along the abscissa of which the ratio is counted, and along the ordinate - the volume corresponding to this ratio, wherein the straight line passes along two points with coordinates [1; 0], under the condition of equality of the volumes of the measuring vessel and the vessel for samples , and [;] - corresponding to the characteristics of the reference body, where is the desired body volume, is the coefficient of the equation of a straight line, is the amount of change in the volume of air in the vessel for samples, is the amount of change in the volume of air in the measuring vessel, , is the amount of change in the volume of air in the vessels during calibration, is the volume of the reference body, the density of the investigated porous body is determined by the formula .

EFFECT: elimination of the need to determine the volume of the vessel in which the porous body is located, when implementing the procedure for measuring the volume and determining the density of porous bodies of arbitrary shape, different moisture content and fractional composition, as well as simplifying the device used for this.

2 cl, 2 dwg