Asphalt-Rubber Blending Systems

Transcription

1 Asphalt-Rubber Blending Systems

2 CEI Enterprises Since 1991, CEI Enterprises has been designing industryleading technologies for blending crumb rubber with asphalt cement for highway paving applications. With over 30 Asphalt-Rubber blending plants delivered, CEI equipment designs incorporate leading technologies that have earned our #1 market share.

3 Asphalt-Rubber Asphalt-Rubber is defined by ASTM definition D8-88 as: A blend of asphalt cement, reclaimed tire rubber and certain additives in which the rubber component is at least 15% by weight of the total blend and has reacted in the asphalt cement sufficiently to cause swelling of the rubber. In actual practice, the rubber component is normally 20% of the binder by weight.

4 Asphalt-Rubber Attributes Better reflective crack resistance Darker in color, providing enhanced pavement markings Better water drainage and skid resistance Cost effective, long-term performance that provides years of maintenance-free road surfaces Cost effective, a thinner lift requires less time to grind, less material to lay and a short construction period Can be used in any climatic area hot or cold Quieter than any other paving material available Keeps tires out of landfills or stockpiles

5 CEI Asphalt-Rubber Blending Plant

6 CEI Asphalt-Rubber Blending Plant Crumb-Rubber Blending Plants are designed with a wide range of options to suit particular users requirements. Options are readily available to meet any specific needs and any customer preferences.

7 Asphalt-Rubber Blending

8 Basic Blending Criteria Flow controls for virgin asphalt, crumb rubber and any additives Automated PLC-based control system for accurate proportioning High-shear mixing for product uniformity High heat system in BTU and temperature to drive the reactions Blended asphalt-rubber sent to reaction tank at final temperature Compliance with all emissions standards

9 Crumb Rubber Hopper Crumb rubber hopper includes an air canon to insure free-flowing material Rotary feeder controls the specified volume to the mixing can Load cells accurately measure material by weight

10 Asphalt Supply & A-R Pumps Asphalt supply and A-R pumps are readily available designs AC supply pump is complete with a Variable Frequency Drive (VFD) Strainers protect against foreign and oversized material flows

11 High Capacity Heating High BTU output: 5.0 MMBTU/HR Hot oil temperatures: 600 degrees F maximum

12 Heat Exchanger Blended Asphalt-Rubber is delivered to the Reaction Tank at usage temperatures for high production. Virgin AC is controlled at temperature compensated mass flow rates for accurate weight proportioning.

13 Liquid additives can be added when required The PLC control system is designed to supply additives at a specified percentage addition rate A heated or non-heated storage tank is optional Additive Systems

14 Mixing Can High shear mixer is used to homogenize the crumb rubber particles with the liquid asphalt An overflow connection is provided for those times when moisture enters the system The tank has dual pump connections for operation and complete drainage

15 Automated PLC Controls PLC system has flow rate, temperature and density compensation. All valves are actuated and all drives have VFD drives. Control panel is arc flash designed for safety. Control house is optional. Recipe-driven logic simplifies operator functions, and flow schematics are provided in the PLC and on the panel.

16 Asphalt-Rubber Reaction Tank

17 Basic Reaction Criteria High agitation for a homogenous product Temperature control and measurement Sampling capability for quality assurance Separate controls per compartment Accurate flow regulation for the plant supply Documentation of actual performance

18 Agitation and Heat Control Multiple coil layers for effective heat transfer Shrouded high-speed auger for pumping Low-level heat shutoff Individual controls in each compartment

19 Large coil area is used for heat transfer Auger provides material agitation and flushing of the coil bundles Auger Agitation

20 Auger Design If the coils are clean, heat transfers, reducing maintenance costs and allowing for maximum production rates. If the coils plug, you not only lose heat but also capacity.

21 Production Capacity Reaction Tank Single Compartment Double Compartment Triple Compartment Tons Per Hour 10 to to to 35 Nominal continuous capacity ratings per 24 hour operating day Compliant with specifications for reaction time Available material to supply a plant - plant piping may be insufficient for the available flow volumes

22 Capacity and Emissions Triple compartments for high production Vent condensers with external cooling Smog Hogs to control final blue smoke fumes

23 Mass flow meter Ports for calibration, drum plant and batch plant Sample testing valve Ability to transfer between each compartment Plant Supply

24 Asphalt-Rubber Plants Batch plants, drum plants, or both. If you need high production, then go with triple-compartment designs. Emission regulations NO PROBLEM.

25 FNF Construction has been presented the 2004 Sheldon G. Hayes Award for excellence in construction of an asphalt pavement. This NAPA award is a twoyear process with projects over 50,000 tons of HMA. This is the first and only Asphalt-Rubber project to reach this level of industry recognition. Asphalt-Rubber

26 A member of the RPA since the beginning. Manufacturing, sales and engineering are based in Albuquerque, NM. For more information, call CEI Enterprises

27 2008 CEI Enterprises, Inc.