How To Ignition Oven Method Asphalt Binder Testing Content

Step 1: Start the asphalt binder testing procedure

To begin the test you will need to turn on the ignition oven and set the chamber temperature used to determine the binder content correction factor. Which is typically around 1000°F.

Step 2: Obtain a representative portion of the asphalt mixture

Once you oven dry the sample, you will then collect a separate representative sample and determine the moisture content.

Step 3: Place the basket assembly on the scale platform

Then record the mass of the entire empty basket assembly, then remove it from the scale.

Step 4: Fill half of the asphalt basket assembly at a time

Take the top portion of the asphalt basket assembly off and and set it aside.

Step 5: Set half of the sample in the bottom basket

Make sure the sample is evenly distributed in the bottom basket and move the mix away from the basket edges (show in image above) to prevent material loss during testing.

Step 6: Attach the top half of the asphalt basket assembly back on

Remove the lid so you can place the remaining half of the sample in the top basket. Again, make sure to evenly distribute the asphalt sample and move the mix away from the basket edges.

Complete the asphalt binder testing sample/basket assembly by securing the lid and assembly guard

Step 7: Put the basket assembly on the scale platform

In addition, you will zero the scale and place the basket assembly that is full with asphalt on the scale platform. And then record the total mass of the basket assembly and sample.

Step 8: Calculate the initial mass of the sample

By subtracting the mass of the empty basket assembly from the total mass of basket assembly and sample you will get the initial mass. Ensure that you round the initial mass of the sample to the nearest one gram.

Step 9: Input the binder calibration factor on the oven

Press the “calib. factor” button (shown in image above), and then quickly entering the value and pressing enter. The decimal is automatic, so a value of 0.18 would be entered as 018. You will need to verify the entry by pressing the “calib. factor” button again.

Step 10: Press the weight button on the oven

You will input the initial mass of the sample by pressing the weight button, entering the initial mass and pressing enter. Also verify the initial mass by pressing the weight button again.

Step 11: Next you will zero the ignition ovens internal scale

Click the zero button on the asphalt ignition dashboard (see the yellow arrows). Verify that the scale reads 0.0.

Step 12: Open the ignition oven door

Stand behind the door as it is open to prevent possible burns. Using the loading fork, you will load the basket assembly into the oven, placing it gently on the ceramic scale platform.

Make sure not to drag the asphalt binder testing sample/basket across the ceramic plate as this could damage the internal scale. Then position the basket so that it is not in contact with the oven walls and will not touch the insulation on the front door when closed. Then close and latch the door.

Step 13: Verify that the total mass of the basket assembly

Make certain that the sample shown on the oven display is within five grams of the total mass recorded from the external scale. If not, you will need to reposition the basket assembly to eliminate rubbing, or check the scale calibration. Once verified, press the start button.

Step 14: No additional loss over a three minute time period

When the ignition oven detects no additional loss over a three minute time period, the burn is complete. You will need to stop the burn sequence and collect the data ticket. Then record the calibrated asphalt content from the ticket to the nearest to 0.01%.

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