METHOD FOR DETERMINING SWELLING PARAMETERS OF SAPONITE-CONTAINING MATERIAL AND DEVICE FOR TESTING MACHINE FOR ITS IMPLEMENTATION Russian patent published in 2024 - IPC G01N3/08 

FIELD: measuring.

SUBSTANCE: invention relates to the field of analysis of swelling parameters of saponite-containing material and can be used to determine content of swelling clay mineral saponite, including in complex assessment of suitability of saponite-containing material for production of engineering barriers, catalysts, cation exchangers, sorbents, filters, membranes, ceramics, etc. Device comprises a housing with a working volume of a cylindrical shape in the form of a thick-walled ring made of stainless steel, in which there is a sample, lower and upper nozzles, a container with water, pump and movable element – piston, which is tightly inserted into the housing from above, which transfers the load from the press plates of the testing machine to the sample and the growing pressure from the swelling sample back. Sample is a mixture of quartz powder, dried to a constant weight, with a solid residue of a saponite-containing material ground into a powder, which is pre-dried to a constant weight until complete removal of free and most of the bound water at temperature of 200 °C. Essence of the method consists in pumping water through a sample and monitoring swelling processes. For this, saponite-containing material is dried to constant weight until complete removal of free and most of bound water at temperature of 200 °C, after which the solid residue is crushed into powder and mixed with quartz powder dried to constant weight. Obtained mixture is poured into the device to the testing machine. Mixture is compacted to obtain a compact sample with a given density, after which water is pumped through the sample and the corresponding swelling parameters of the compact samples are recorded – swelling pressure or relative volumetric swelling, which are then substituted into corresponding formulas for recalculation of these parameters for saponite-containing material not diluted with quartz powder. Content of saponite in the saponite-containing material is found by substituting the swelling pressure of the compact sample into a linear mathematical expression of the previously constructed calibration straight line with subsequent multiplication of the result by the dilution factor of the saponite-containing material with sand.

EFFECT: faster acquisition of data on swelling pressure of saponite-containing material, expanded functionality in terms of the possibility of determining the value of relative swelling and calculating the content of saponite in the saponite-containing material, as well as the possibility of using the device in combination with various testing machines.

2 cl, 1 tbl, 10 dwg