Various modes of Brinell viscometer, Brinell rotational viscosity temperature

Brinell rotational viscometer to determine the performance viscosity of road asphalt in the temperature range of more than 45, **Shanghebei Dahong Experimental Instrument****, based on Pascal (Pa S). The viscosity curves of different temperatures determined by this method are used to determine the construction temperature of various asphalt mixtures.

Brinell rotational viscometer operating procedures:

1. According to the requirements of T0625 "Asphalt Brinell Rotational Viscosity Test (Brockfield Viscometer Method)", prepare asphalt samples, pack them in sample containers, and heat them in the oven to about 100 above the softening point, keep warm for 30min 60 min for standby, and pay special attention to removing bubbles for modified asphalt.

2. The level of the instrument should be carefully adjusted during installation, and the bubble of the level of the instrument should be checked before use to ensure that the instrument is in a horizontal working state.

3. There are two power switches on the auxiliary control box panel, the upper "power supply" is the main power source, and the lower "heating" is in charge of heating. Turn on the two buttons on the instrument panel successively, and set the temperature to the required test temperature.

4. Select the appropriate rotor and speed according to the asphalt viscosity (see Table 2 for details).

5. Take out the asphalt sample container from the oven, stir it properly, and add the asphalt sample (can be converted into mass according to the density of the sample) to the sample cylinder of the viscometer according to the volume of the sample required by the rotor model (see Table 1 for details), so as to avoid asphalt overflow or insufficient dosage. Rotor type Sample volume 21 8ml 27 28 29 13ml

6. Adjust the control temperature of the oven to the temperature required for the sample test, and place the rotor and the sample cylinder together in the oven for heat preservation for hours. If the test temperature is low, the sample container can be properly cooled to lower than the test temperature and then placed in an oven to keep warm.

7. Take out the rotor and the sample cylinder, and install them on the viscometer respectively: at first, the sample cylinder is placed in the inner hole of the heater with special pliers, and then the selected rotor, the connecting hook and the transition screw are connected in order, the rotor is put into the sample cylinder, and the transition screw of its upper part is screwed on the connecting screw under the protective sleeve (see Figure 4). Note:

**Shanghebei Dahong Experimental Instrument**** When loading and unloading the rotor, the connecting screw must be held up slightly by hand. Since the connecting thread is a left-handed thread (reverse thread), it should be screwed in and installed counterclockwise during installation (screwed out and removed clockwise); It is necessary to use special pliers to take out the sample slide cylinder from the inner hole of the heater.

8. Rotate the lifting knob to make the instrument slowly descend, and the rotor is completely immersed in the measured liquid until the rotor liquid level mark is level with the test cup lid, and at the same time move the heater slightly to make the rotor in the middle of the sample cylinder to ensure that the rotor will not rub the wall.

9. Carefully adjust the level of the instrument again.

cps what unit of Brinell viscosity or rotational viscosity?

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User 2795758418663

Concern. cps] is a Brinell viscosity unit, measured by a Brinell slag viscometer, in Pa·second, sometimes also in Poise or centipoise (1 Poise = 10 (-1) Pa·s, 1 centiPoise = 10 (-2) Poise).

The measurement method of viscosity is divided into two categories: absolute viscosity and relative viscosity, and absolute viscosity is divided into two types: dynamic viscosity and kinematic viscosity, in which the unit of dynamic viscosity is Pa s (Pa second), 1 Pa s = 1kcps. 【Brinell Viscometer】The rotational viscosity measurement method pioneered by the Brookfield family in the United States has created a new viscosity value based on the unique relationship between the shear and the inhibition force generated between the rotor and the fluid, and officially created a precedent for dynamic viscosity measurement. The Brookfield family designed the world's first dynamic viscometer, the rotational viscometer, which is known today as a Brinell viscometer, under their family name.

And Bruce is also the abbreviation of the name of the Brookfield family.

DU was selected according to the viscosity range of the BAI sample to be measured

Choose a drum. P.S

Factor DAO of a rotating drum

back with the measuring range. Factor range 1 10mpa 2 20mpa 4 40mpa 5 50mpa

Zero point correction: hit.

Answer: Turn on the power switch, in the case of no-load rotation of the motor, gently screw the zeroing screw at the left end of the machine, and the pointer should be pointed at the zero point. The zero point correction during the test should be repeated three times under no load to confirm that the zero position is correct before the zero adjustment is completed.

Extend the ends of the U-spring into the bowl so that the hook is exposed outside the barrel.

Carefully pour the test liquid into the test container until the liquid level reaches the lower edge of the conical surface, and insert the drum into the liquid until it is completely submerged. Place the test container on the instrument holder and hang the drum hook from the instrument left-hand knurled screw hook.

Start the motor, at this time, the tester can be slightly moved on the bracket forward, backward, left and right, so that the drum is aligned with the center (there should be no vibration sound at this time). When the pointer is stable, it can be read, if the reading is less than 10 bars, the larger bowl should be replaced.

The difference between the value of each measurement and the average value shall not exceed 3% of the average value, otherwise the third measurement shall be taken.

After the measurement, remove the test container, wash the drum and test container, and put it back in place.

Exit the zeroing screw, turn off the power, and fill in the "Instrument Usage Record".

Brinell viscometer is a rotary viscometer, which is driven by a motor to rotate at a constant speed through variable speed. When the rotor rotates in a certain liquid, the liquid creates a viscous moment acting on the rotor. The greater the viscosity of the liquid, the greater the viscous moment; Conversely, the smaller the viscosity of the liquid, the smaller the viscous moment.

The viscous moment acting on the rotor is detected by the sensor and the viscosity of the measured liquid can be determined by computer processing.

Brinell viscometers, English name Brookfield laboratory viscometers are divided into three basic styles: analogue analog, digital and programmable. The main noticeable difference between these three is in the display of their viscosity readings:

The analogue readings are mainly based on the rotation scale and the position of the hands; The digital reading is mainly to observe the display of the 3-digit LED. In addition, the digital viscometer has a 0-10mV output and can be connected to many types of instrumentation such as remote displays, controllers, and recorders.

It is mainly used to determine the apparent viscosity of road asphalt in the temperature range of 45 and 200 according to the Brockfield viscometer rotation method. According to viscosity temperature curve, can also be used to determine the construction temperature of asphalt mixture.

The power cord must be plugged into the instrument first, press the power on, and use it in strict accordance with the operation steps.

The parts in the instrument shall not be disassembled at will, and the hairspring shall not be disassembled and assembled.

Before and after use, the inner wall of the drum and the measuring instrument should be washed and wiped dry to ensure the accuracy of the instrument.

Instrument storage should be kept dry at all times.

1. Measuring range: 25MPa·s 1 107MPa·s (optional No. 30 rotor measurement range can be expanded to 2 107MPa·s);

2. There are four kinds of rotors with rotor specifications (30 rotors can be optional);

3. Rotor speed: stepless speed regulation;

4. Measurement error: 2% (f·s), (3% (f·s) when optional No. 30 rotor);

5. Temperature control range: 25 200;

6. Temperature control accuracy:

7. Sample cylinder volume: 20ml;

8. Power supply: AC 220V 10%, 50Hz;

9. Ambient temperature: 5 35 (the ambient temperature should be about 5 lower than the control temperature of the heater);

10. Environmental relative humidity: not more than 80%.