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| Warranty: | Warranty Is 24 Months |
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Advantage
Savings and Convenience:
* The furnace has an internal scale, that automatically monitors the sample weight throughout the ignition process, saving valuable technician time and increasing productivity in the lab. The ignition method replaces the costly and time consuming solvent extraction method by eliminating the primary cost of solvent purchase and the secondary cost of solvent disposal.
Safety:
* The content furnace eliminates the exposure of the asphalt technician to harmful solvents.
* The automatic door lock feature prevents opening the chamber door during the critical test time.This feature provides operator safety and helps ensure testing integrity.
* This content furnace is the only system on the market containing a high temperature afterburner used in conjunction with a patented ceramic filter to reduce the emissions of the ignition process by up to 95%.
* Our system has the capability to accept positive or negative correction factors for use with mixes containing hydrated lime.
Hardware:
* 16 bit microprocessor controller.
* CPU card controlling both test data display,temperature, database and internal functions.
* On board 40 column serial printer
* An accurate internal balance monitors weights automatically throughout ignition to within ± 0.1 g.
* PID closed loop thermoregulation for both oven and afterburner
* 240x120 pixel large graphic display
* RS 232 output for PC connection
Sample Preparation:
1.Mixture warmed in an oven at 125 ± 5 °C (257 ± 9 °F) until it can be handled if necessary
2. Particles of the mixture separated with spatula or trowel
3. The sample obtained by splitting or quartering
4. Sample mass at least: 1200 g for No. 4; 1200 g for G in.; 1500 g for ½ in.; 2000 g for ¾ in.; 3000 g for 1 in.; 4000 g for 1 ½ in.
5. Sample mass is based on the nominal maximum aggregate size
6. Specimen mass not more than 400 g greater than the minimum recommended mass
7. Sample divided into suitable increments and tested if necessary
Ignition Procedure:
1.Furnace preheated to 538 °C (1000 °F) or the calibration temperature
2.Temperature recorded before testing if the furnace does not automatically
3. Sample dried to constant mass at 105 ± 5 °C (221 ± 9 °F)
4. A test specimen for moisture determination obtained if necessary and moisture content determined according to T 110
5. Calibration factor entered for the mix. Basket(s) placed in catch pan and weighed with guards in place
6. Sample evenly distributed in the basket, material kept away from edges and leveled
7. The total mass of the sample, basket, catch pan and basket guards recorded
8. The initial mass of the specimen calculated. Initial mass entered into the furnace controller and verified
9. Baskets placed in the furnace and chamber door closed
10. Furnace scale agrees within 5 g of the total mass
11. Pressing the start button locks the door and starts the blower
12. The test continued until the change in mass does not exceed 0.01% for three consecutive minutes
13. Ending mass loss %age of 0.02% may be used for excessive aggregate loss
14. Corrected asphalt content (%) from the printed ticket reported. Moisture content subtracted from the printed ticket and the difference reported. Baskets removed and allowed to cool to room temperature
15.Corrected asphalt content (% AC) calculated by the formula below:
%AC = ((MB-MA)/MB × 100)-CF
where MB = total mass prior to ignition,
MA= total mass after ignition,
CF= calibration factor
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