Determination of Penetration of Residue

TESTS ON BITUMEN

Determination of Penetration of Residue

Code: This test is done as per ASTM D 1754-87

Procedure:

  • i) Level the oven so that the shelf rotates in a horizontal plane. Determine the temperature of the oven by means of the specified thermometer
  • ii) With the oven at 325 ± 2 °F (163 ± 1 °C), quickly place the containers with the sample on the circular shelf, close the oven, and start rotating the shelf. Maintain the specified temperature range for 5 h after the sample has been introduced and the oven has again reached that temperature. The 5-h period shall start when the temperature reaches 162 °C and in no case shall the total time that a sample is in the oven be more than 5 1/4 h. At the conclusion of the heating period, remove the samples from the oven. If the loss is being determined, cool to room temperature, weigh to the nearest 0.001 g, and calculate the loss based on the asphalt in each container. If the loss is not being determined skip step No. 3, given below.
  • iii) After weighing the samples, place them on a refectory-board and then on the shelf of the oven maintained at 163°C. Close the oven and rotate the shelf for 15 min, remove the samples and board.
  • ii) Transfer the material from each pan immediately into an 8-oz ointment tin. Remove all of the material from the pans by scraping with a suitable spatula or putty knife. Stir the combined residues thoroughly, placing the 8-oz container on a hot plate to maintain the material in a fluid condition if necessary. Complete the tests on residue by appropriate ASTM test methods within 72 h of performing this test.
  • iii) Bitumen used in pavement mixes should not indicate more than 1% loss in weight, but for bitumen having penetration values 150-200 up to 2% loss in weight is allowed.

Experimental Data:

  • i) Report the values of the original asphalt properties measured and the residue property values as measured. Penetration change is evaluated as the penetration of the residue expressed as the percentage of the original penetration.
  • ii) Report ductility or other test results in accordance with the appropriate ASTM test methods.

Uses:

This method used to determine he penetration of residue on Bitumen.