16. Uji Berat Jenis Aspal Keras

Summary

The video script covers a detailed process of testing the specific gravity of hard asphalt using a method similar to the Blade type test but with a different test specimen. The procedure involves weighing an empty pycnometer, filling it with water, sealing it properly, and measuring the weight again. The next step involves filling the pycnometer with hot asphalt and measuring its weight once cooled. The results are recorded, and the final calculations are made to complete the testing process.

Takeaways

• 😀 The test involves determining the specific gravity of hard asphalt using a procedure similar to the Blade type Killer test.
• 😀 The sample used in the test is the same as the Killer type, and the test aims to measure the density of the asphalt material.
• 😀 A pycnometer is used for weighing, first in its empty state to determine its weight.
• 😀 The pycnometer is filled with water, ensuring the water level is above the hole and that air can escape through it during the process.
• 😀 The weight of the pycnometer filled with water is measured to calculate its weight after being sealed and ensuring no water leaks.
• 😀 After weighing, the water is removed from the pycnometer, and the sample is oven-dried to prepare it for the next step.
• 😀 Hot asphalt is added to the pycnometer, filling it approximately halfway. The asphalt is in a hot, molten state for proper measurement.
• 😀 The pycnometer is sealed, and the asphalt sample is allowed to cool down before being weighed again.
• 😀 After cooling, the final weight of the pycnometer filled with asphalt is measured to determine the density of the material.
• 😀 The final weight and the test values are recorded and calculated, with the test procedure concluding once these steps are completed.

Q & A

What is the purpose of this procedure?

The procedure is designed to test the specific gravity of hard asphalt using a pycnometer method.

How does the pycnometer test differ from the Blade test?

The pycnometer test uses the same test object as the Blade test, but it differs in the use of a pycnometer filled with water to measure the asphalt's specific gravity.

What is the first step in the procedure?

The first step is to weigh the empty pycnometer to get its baseline weight.

What do you do after weighing the empty pycnometer?

After weighing the empty pycnometer, it is filled with water, and its weight is measured again.

What should you do after filling the pycnometer with water?

After filling the pycnometer with water, you must close the hole of the pycnometer, ensuring no water escapes. You also need to wipe off any excess water from the surface.

Why is the hole of the pycnometer kept open when filling it with water?

The hole of the pycnometer is kept open to allow excess air and water to escape, ensuring accurate measurement.

What happens after the pycnometer is filled with water?

Once the pycnometer is filled with water, it is weighed again to obtain its total weight, including the water.

What is the next step after measuring the weight of the pycnometer with water?

After weighing the pycnometer with water, the water is emptied out, and the pycnometer is heated in an oven.

What is done after the pycnometer is heated?

Once the pycnometer is heated, hot asphalt is poured into it, and the pycnometer is filled up to about half of its capacity.

What should be done after the asphalt is placed in the pycnometer?

After placing the hot asphalt in the pycnometer, it is allowed to cool before being weighed again.

What is the final weight recorded in the procedure?

The final weight recorded is the weight of the pycnometer containing the cooled asphalt, which is 4500.46 grams.

What is the importance of wiping the surface of the pycnometer?

Wiping the surface of the pycnometer ensures that no water or asphalt residue remains, providing an accurate weight measurement.