Terex

FAQ

• Cautions with fuels for asphalt plants

  The fuel to be used should have a minimum viscosity of 100 SSU, which is equivalent to 21 cst, for perfect spraying in the asphalt plant's burner. If the fuel is of the light type, it can be burned at room temperature without needing to heat it. If it is of the heavy type, it must be heated to ensure the appropriate viscosity for the burner. If this parameter is not respected, there are serious risks of poor combustion happening due to deficient
  spraying. Fuels considered to as light: there is no need for heating these because they have a viscosity that is less than 100 SSU or 21 cst
  
  • Diesel
  • Ethanol
  • Light Bio-fuel (authorized supplier with
  specification)
  • Kerosene
  
  Fuels considered as heavy: heating is necessary in order to achieve a viscosity of less than 100 SSU or 21 cst
  • Fuel oil OC-1A (former BPF 1A):
  • Fuel oil OC-1A (former BPF 2A):
  • Schist oil L, E, OT (check viscosity with supplier)
  
  CM-30 is not considered fuel
  Caution: CM-30 is not considered fuel as it is used for priming since it is diluted asphalt. Furthermore, its composition is 52% AC and 48% dilutant (kerosene). It should not be used for burning in asphalt plants because it prematurely contaminates bag filters with residues that are not burnt during combustion. Also, due to the high rate of sulfur, it severely attacks the bag filter components due to an H2O + HSO3 chemical reaction (formation of sulfuric acid). In order to use heavy oils in the asphalt plant burners, the supplier must specify at what temperature the oil will have the recommended viscosity of 100 SSU. This temperature gain is achieved through the temperature regulator (heat exchanger) because the stored fuel must be below its flash point.
  

• Avoiding segregation/contamination of the virgin materials

  The efficient handling of the aggregates with Terex’s Magnum Series continual asphalt production plants helps in the correct metering and individual weighing and ensures excellence in the final quality of the asphalt mixture:
  
  • It is best not to form piles that are very high because the larger pieces of material will tend to roll down the side of the pile and accumulate on the lowest part.
  • Work with small piles, unloading aggregates in quantities smaller than the truck’s total capacity.
  • We recommend taking the same precautions described above when transporting the aggregates by dump truck from the quarry to your plant’s site.
  • Place the different batches of virgin aggregates a good distance apart in order to avoid contamination when loading the bins.
  • Avoid the contamination of different types of materials by using the same front loader. Be sure to check if the front loader’s bucket is clean before using it for moving another batch, whether during storage or for loading the bins at the plants.
  • Place the different batches of virgin aggregates a good distance apart from each other in order to avoid contamination when loading the bins.
  • Train your front loader operator so that when he is replenishing the aggregate bins to be careful and make sure that he does not cause small contaminations from one bin to another as this could affect the granulometric curve of your final mixture.
  • Consistently check if the aggregates coming from the rock crusher are of the right granule size for the project’s asphalt recipe chosen.