Asphalt dynamic viscometer
Instruments and materials
1
Vacuum decompression capillary viscometer: a group
3
Capillary tube, the shape of the capillary is shown in
1
, model and size see table
1
.
2
thermometer:
50
°C～
100
°C, the index is
0.1
°C
.
3
Constant temperature water tank: made of hard glass, the height of which needs to be placed in the viscometer, the highest time mark is at least under the liquid level
20mm
, with automatic heating and temperature controller to keep the water temperature at the test temperature
0.1
°C, with a stirrer and clamping equipment. The temperature difference between different locations in the sink should not be greater than
0.1
°C. The temperature control precision of the heat preservation device should reach
0.1
°C.
4
Vacuum decompression system: vacuum degree is reached
40kPammHg±66.5Pa
(
300mmHg±0.5mmHg
) pressure, a brief schematic of all devices
2
There should be no air leakage at each joint to ensure the airtightness. When the capillary pressure reducing valve is opened for measurement, no negative pressure is generated. Connect the vacuum pump to the open end to evacuate.
5
Stopwatch:
2
Indexing
0.1s
Total range
15min
The error is not greater than
±0.05%
.
The method is suitable for determining the dynamic viscosity of viscous petroleum asphalt by a vacuum decompression capillary viscometer. Unless otherwise noted, the test temperature is
60
°C, the degree of vacuum is
40kPa
.
Twinkle System Technology Co Ltd , https://www.pickingbylight.com