RU1798661C - Flow meter - Google Patents

Abstract

The invention relates to devices for determining the rheological characteristics of building mixtures in complex stress-strain states. The creature is the embodiment of a rheometer. The rheometer contains a support frame and a working body of two horizontal rings. The lower ring is integral with the container for the test material and is mounted on rolling elements. The drive of the upper ring is made in the form of a rocker arm and is equipped with two loading platforms. The beam is connected to the rod of the upper ring by a normal deformation sensor and a recording device. The bottom ring is rigidly connected to a shear strain sensor and a second recording device. Loading of the test material is carried out by setting weights on platforms. By combining loading, a different direction of deformation of the material can be specified: compression, tension, alternating shear. 1 s.p. f-ly, 1 ill. ate

Description

The invention relates to devices for the study of materials by determining their physical and mechanical properties and can be used to determine the rheological characteristics of pasty media, for example building mixtures.

The purpose of the invention is to expand the range of research to the side in the viscous, elastic, relaxation and retardation properties of pasty building materials.

The drawing shows a rheometer, a General view.

The rheometer contains a support frame 1, a working body of two horizontal rings 2,3 with corrugations 4. The lower ring 3 is made integral with the container for the test material 5 and mounted on the rolling bodies 6. The drive of the upper ring 2 is made in the form of a rocker 7, equipped with two the sides by loading pads 8, 9. One arm of the rocker arm 7 is connected to the rod 10 of the upper organ (upper ring 2). The other arm of the rocker arm is connected with a non-contact sensor 11 of normal deformations and a recording device 12. The drive of the lower ring 3 is made in the form of a unit load system 13, equipped with two loading platforms 14, 15, and the lower ring itself is rigidly connected to the sensor 16 shear deformations and the second recording device 17. The rheometer may be provided with a shock or vibration plate 18 mounted under the rolling bodies 6.

The rheometer works as follows.

In the ring of the container 5 is placed the studied material, for example aerated concrete, a mixture on the surface of which

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using the rocker arm 7, the upper ring 2 is lowered. Then a load is placed on one of the loading platforms, for example 8, thereby loading the material with normal loads, while its deformation through the sensor 11 is detected by the device 12; at the same time, on one of the loading platforms, for example 15, another predetermined load is set, which, through the trunlock system 1.5 and the lower container ring 3, loads the material with shear loads, while its deformation through the sensor 16 is recorded by the device 17; I combine loading of material by installing weights on loading platforms 8, 9 and 14, 15, you can specify a different direction of deformation of materials (compression, by installing with a load on platform 8, or tension - by installing when loading on a platform 9, as well as double-sided ( alternating) shift by setting the load on the site 14 or 15). .-;.: h

In the case of studying the characteristics of the intumescent mixture, the beam 7 is balanced by setting the equilibrium weights on the platforms 8 and 9. In this case, the kinetics of the expansion of the mixture is recorded by the device 12, and the shear deformation is recorded by the device 17. In the case of studying the rheological behavior of the material under conditions of vibration or shock after loading the container ring of the mixture 5 and putting the working surface of the upper ring 2 into contact with the material, the vibrating plate (shock table) 18 is turned on, the necessary impact intensity is established, and further operations are carried out similarly .

The proposed design of the rheometer allows us to expand the range of research of experimental data that can be used to solve the problems of molding both conventional and intumescent building mixtures, for example, aerated concrete, transporting them through pipelines, and also to solve the problems of molding any building products by pressing methods and rolled, vibro or impact molded.

Formula Invention

Claims (2)

1. A rheometer containing a support frame, a working body of two horizontal rings with corrugations, the lower ring of which is made integral with the container for the test material and mounted on rolling bodies, the upper ring drive system along, and the lower ring around the vertical axis of the sensor and registering devices, from l and ch and y u and with the fact that. in order to expand the range of research to the side of the viscous, elastic, relaxation and retardation properties of pasty of building materials, the drive of the upper ring is made in the form of a beam equipped on both sides with loading platforms, one shoulder of which is connected to the rod of the working body, and the other with a normal deformation sensor and a recording device, while the lower ring is made in the form of a cable block system and the ring itself is rigidly connected to a shear strain sensor and a recording device. 2. The rheometer according to claim 1, excellent and with the fact that it is additionally equipped with shock or vibration pad mounted under rolling elements of the lower ring of the worker body. / C I.