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Product Instructions for the Asphalt Extensometer
2021-03-08
1. This instrument should be placed horizontally indoors on a surface that is free from vibrations and corrosive gases, with a temperature ranging from 0℃ to 40℃ and a relative humidity not exceeding 80%. It must also have proper grounding protection.
2. Before use, check that the water level in the sink meets the requirements specified in the test operating procedures. With all function switches turned off, connect the power supply and verify that the stirring motor and the extension power motor are functioning properly.
3. Set the temperature controller to the desired temperature. Depending on the experimental requirements and ambient temperature, activate the switch for either the cooling or heating system, and simultaneously start the stirring motor. During the experiment, please refer to the thermometer inside the water bath as the reference temperature.
4. Pull out the handle, rotate it slightly to put it in neutral, then move the gearbox and place the mold filled with the sample onto the copper cylindrical pin at the extension end of the instrument. Push in the handle to engage the gears, thereby bringing the instrument into its working position.
5. Connect the power supply to the digital display installed on the gearbox, then turn on the start switch. The instrument will begin operating, and the display will show the elongation length. During the test, if you notice asphalt filaments floating on the water surface or sinking to the bottom of the tank, add alcohol or table salt to adjust the specific gravity of the water until it matches that of the sample, and then continue the test.
6. When the asphalt specimen breaks or reaches the test requirements, press the counting switch once. The instrument will automatically record the elongation of that specimen. Pressing the counting switch three times in succession will automatically calculate the average value of the three specimens.
7. After finishing work, turn off the power, remove the test mold, pull out the handle to put the gearshift into neutral, and push the gearbox back into place. Open the drain valve to completely empty the water from the groove, then wipe the area dry to prevent rusting.
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