Available Variants:
- Complete Stainless Steel
- Complete S.S. With PLC And HMI
- As per ASTM D2872, AASHTO T240, IS 15799
- Automatic Programmable
Common Details:
Application:
- Determination of the resistance of bituminous binder to hardening under the influence of heat and air : Rolling Thin Film Oven Test.
Introduction:
- This unit simulates the hardening that affects binder during its mixture with aggregates in the plant and during the finishing & rolling of the bituminous layers (Short Term Ageing). Provides the binder sample ready for change in mass determination and for other tests that characterize the binder about the resistance to short term ageing.
Salient Features:
- Double walled electrically heated conventional type oven with high glass wool density insulation to prevent thermal loss.
- Over temperature automatic switch.
- Automatic switch that switches off the oven in case of accidental opening of the door during the test.
- Spy lamp and alarm for door open with fan still running.
- Magnetothermic switch.
- Thermal insulation with high quality material.
- Door with high resistance glass separated by an air space offering uninterrupted view of inside of the oven.
- Armored heating resistance to safety requirement.
- Transmission of movement of the vertical carriage and of the squirrel cage - type fan by toothed belt, to grant constant speed.
- Digital electronic thermo regulator operating in PID mode. By this way it is assured that the test temperature recovery time is complying with the specifications, that is 10 minutes after 1 minute with door open (estimated time necessary for the positioning of the glass containers with sample into the vertical carriage).
- Cooling fan operating all over the test to protect the movement transmission of the squirrel cage fan and of the vertical carriage.
- Rotating shelf constructed such that it offers minimum resistance to air circulation for better heat distribution while sample container are in place.
- Complete with pilot indicating lamps, 2 meter cord wire and power plug.
Details Of Apparatus:
- The entire test method comprises one each of Hot Air oven, Rotating Shelf (Vertical circular carriage), Sample Containers and Thermometer as per following descriptions.
Rotating Shelf:
- Single metal Vertical circular carriage having diameter of 304.8mm as per ASTM D2872.
- Shelf construction is such that it provides a flat surface for support of the containers without blocking air circulation through the shelf when the containers are in place.
- Shelf is suspended by a Horizontal shaft and centered with respect to the vertical interior dimensions of the oven.
- Can accommodate four (8) no glass sample containers.
Sample Containers:
Sample Containers: (8 Nos.):
- Inside Diameter : 64 mm ± 1.2 mm
- Depth : 139.7 mm
- Flat bottom design
- Made of clear, transparent, heat resistant glass material
At Extra Cost:
- Analytical balance capable of measurements to within 0.001 grams if determining mass loss during testing.
- Laboratory gloves suitable for handling hot glassware.
- A suitable rack for cooling of the sample jars after aging.
- A scraper suitable for removing the binder residue from the sample containers for further preparation and testing after aging.
- Digital Stop Watch for various stages of the aging process.
- ASTM 13C thermometer.
- Calibration certificate with traceability to National Standards as per - IEC/ISO 17025.
Variant Details:
1. Complete Stainless Steel:
Complies with following International Standards:
- ASTM D2872; AASHTO T240 ; CNR N.54; EN 12607 - 1, IS 15799-2008
Additional Salient Features:
- Double walled, inner chamber S.S.304, Outer S.S.304.
- Flow meter (Rota meter), with air flow regulator.
- Rotating shelf is rotated by electric motor at a speed of 15 ± 0.2 RPM as per ASTM D2872.
- Cooling fan operating all over the test to protect the movement transmission of the squirrel cage fan and of the vertical carriage.
2. Complete S.S. With PLC And HMI:
Complies with following International Standards:
- ASTM D2872, AASHTO T240, EN 12607-1
Vertical Circular Carriage:
- Diameter: 12 inches
- Shaft: Diameter 0.75 inches, RPM range 14.8 to 15.2
Door Window:
- Size: Width 305-330 mm, Height 203-229 mm
- Construction: Two sheets of heat-resistant glass with an air space for unobstructed viewing
Air Plenum:
- Depth: 1.5 inches (38.1 mm) from walls and ceiling
Fan Specifications:
- Type: Squirrel cage
- Speed: 1725 RPM
Oven Details:
- Temperature Range: 162.5˚C to 163.5˚C
- Time to Reach Temperature: Maximum 8 minutes
- Flow Meter Display: Digital, adjustable from 0.1 to 10000 mL/min, accurate at 4000 ± 200 mL/min
- Exterior Material: Stainless steel with linen pattern
- Controls: Touchscreen graphical color display; includes over-temperature switch, door switch, lamp and alarm for door operation, magneto-thermic switch
- Accessories: Eight class bottles (standard dimensions)
Pump Specifications:
- Type: Diaphragm
- Free Air Displacement: 6 L/min
- Max Pressure (as air compressor): 2.4 bar
- Ultimate Vacuum (as vacuum pump): 100 mbar
- Voltage: 110-230 V, 50-60 Hz, 1 phase
Rack Details:
- Material: Stainless steel or aluminum
- Clearance: Minimum 1 inch between containers or surfaces
3. As per ASTM D2872, AASHTO T240, IS 15799:
Complies with following International Standards:
- ASTM D2872; AASHTO T240 ; CNR N.54; EN 12607 - 1, IS 15799-2008
Additional Salient Features:
- Double walled, inner chamber S.S.304, Outer CRC Powder coated.
- Flow meter (Rota meter), with air flow regulator.
4. Automatic Programmable:
Complies with following International Standards:
- ASTM D2872; AASHTO T240 ; CNR N.54; EN 12607 - 1, IS 15799-2008
Additional Salient Features:
- Double walled, inner chamber S.S.304, Outer CRC Powder coated.
- Digital Flow meter, with air flow regulator.
Rotating Shelf:
- Shelf is rotated by electric motor at a variable speed of 5-60 RPM as per ASTM D2872.
