SU756274A1 - Device for determining rheological properties of concrete mixture - Google Patents

Description

The invention relates to devices for determining the rheological properties of highly viscous media, such as concrete mixtures. $

Known viscometer for highly viscous media such as cement mass.

The device is equipped with an electric motor, the rotor of which carries a blade immersed in the test medium at the end of the extended axis. The frame of the motor rotates on the bearings and is exposed to the opposite torque. The pneumatic system connected to the frame of the motor using a nozzle-flap assembly and bellows converts the torque into a pneumatic signal proportional to the viscosity of the medium under study.

Also known instrument for measuring the viscosity of concrete. As a __ immersion body, a spring made of round steel wire or two or more rods are used, which are fixed evenly around the circumference of the __ disk around the central rod.

Known viscometers are structurally complex and not suitable for rapid analysis. an

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Closest to the invention is a device for measuring glass by pressing in, comprising a housing with a stem with a spring and guides located in it, a sensitive element in the form of a rod tip and a stopwatch. It measures the time of penetration of the tip into the mass under investigation to a fixed depth for a given load. To regulate the load system, a spring compression control mechanism is provided.

The purpose of the invention is to improve the accuracy of measurements.

To achieve this goal, the sensing element is designed in the form of sliding blades hinged with a system of levers on the rod.

The drawing shows a device for determining the rheological properties of a concrete mix.

The device consists of a housing 1, a stem 2 with a handle 3, guides 4, a system of levers 5, replaceable blades 6. The rod is equipped with a spring 7 with a nut adjusting its rigidity 8. The stop watch 9 and the device are turned on simultaneously by pressing the start lever 3

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ka 10 ". To install the device ny. the surface of the concrete mix it is equipped with a handle 11 and a diskbm 12, and to return the start lever to its original position, a spring 13. To stop the stopwatch and reset the readings, the device is equipped with a lever 14 and a pin 15.

The device works as follows.

Using the handle 11, the device is installed disk 12 on the surface of the concrete mix. By pressing the start button 10, the device and the stopwatch 9 are turned on. The rod 2 under the action of the spring 7 moves in the guides 4 and through the system of levers 5 pushes the blades 6. The stopwatch 9, which is switched on simultaneously with the device, counts the time of the blade vanes. The stopwatch 9 is turned off in the lowest position by pressing the pin 15 on the lever 14, which in turn presses the stopwatch head. Taking readings from the stopwatch, platoon device

5 carry out the handle 3.

Claims (1)

Claim | 0 Device for determining the rheological properties of a concrete mix, comprising a housing with springs located in it with a spring and guides, a sensing element located . - at the lower end of the stem, and a stopwatch, '^ characterized in that, with In order to increase the accuracy of measurements, the sensitive element is designed as sliding blades hinged with a system of levers on the rod. I