UJI PENETRASI ASPAL

Summary

This video demonstrates the process of testing asphalt properties, specifically penetration testing. The procedure involves heating and cooling asphalt before submerging it in water at 25°C for 90 minutes. A penetrometer is then used to measure the penetration depth after pressing the needle for five seconds. The results are observed and recorded, and if the findings are within the specified range, the asphalt passes the test. The video emphasizes accurate temperature control and procedure execution, along with performing duplicate tests for reliable results. Viewers are encouraged to refer to the video for detailed instructions and analysis.

Takeaways

• 😀 The experiment involves testing the penetration of asphalt using a penetration tester.
• 😀 Asphalt used in the test is in liquid form and is heated before being poured into a container.
• 😀 After the asphalt is filled in the container, it is allowed to cool for 1.5 to 2 hours.
• 😀 The cooled asphalt is submerged in water at room temperature (25°C) for 1.5 hours.
• 😀 The penetration test is performed using a penetrometer after the asphalt has soaked in water for the required time.
• 😀 The penetrometer’s needle is placed on the surface of the asphalt and pressed for 5 seconds, then the penetration depth is measured.
• 😀 The measurement is repeated three times, with each test point spaced about 10 mm apart.
• 😀 The average result from the three tests is calculated and compared to the asphalt property table.
• 😀 If the test result falls within the expected range, it meets the specification; if not, it may indicate procedural issues or temperature inconsistency.
• 😀 If the results do not match the expected values, the test needs to be repeated with correct procedures.
• 😀 The test should be performed on at least two samples to compare results and ensure accuracy.

Q & A

What is the first step in the asphalt penetration test?

The first step is to heat the asphalt and fill it into a container. Then, the asphalt is allowed to cool for about 1.5 to 2 hours before the test is performed.

How long should the asphalt sample be cooled before testing?

The asphalt sample should be cooled for approximately 1.5 to 2 hours.

At what temperature should the asphalt sample be kept during the test?

The temperature of the asphalt sample should be maintained at room temperature, which is 25°C.

How long should the asphalt sample be submerged in water before testing?

The asphalt sample should be submerged in water for about 1.5 hours before the penetration test.

What equipment is used for the penetration test of the asphalt?

The equipment used for the penetration test is a penetrometer, which measures the penetration depth of the needle into the asphalt.

What is the method for conducting the penetration test?

The penetrometer's needle is placed on the surface of the submerged asphalt. It is then pressed down for 5 seconds, and the penetration depth is recorded.

How many times should the penetration test be repeated?

The penetration test should be performed at least three times, with each measurement taken approximately 10 mm apart.

How is the final result of the penetration test determined?

The final result is the average of the three penetration measurements. This result is then compared with the appropriate specification table for asphalt properties.

What should be done if the results of the penetration test do not meet the specification?

If the results do not match the specification, the test may need to be repeated, ensuring that all procedures are correctly followed, such as maintaining the proper temperature and correct placement of the penetrometer needle.

What factors could cause incorrect results in the penetration test?

Incorrect results could occur if the temperature of the asphalt is too high or too low, or if the penetrometer needle is not properly positioned on the surface of the asphalt.