Asphalt plants, also called asphalt mixing plants or hot mixing plants, are equipment that can mix aggregates and bitumen to produce asphalt mixes for road paving. In some cases, mineral fillers and additives may be required to be added to the mixing process. Asphalt mix can be widely applied for pavement of highways, municipal roads, parking lots, airport expressways, etc. While there are a variety of classification standards related to asphalt plants, some representative types, such as batch mix, drum mix, mobile, and recycling, are widely accepted. The classification of asphalt plants is summarized in detail in the article How Do Asphalt Plants Work

Basic types of asphalt plants

Definition- An asphalt batching plant is a set of equipment that produces the final mix batch by batch, and is characterized by intermittent pauses between batches. Due to the precise weighing system for dosing aggregates, bitumen, and other mixtures, its products are of high quality. The mixer causes a time lag between two mixing batches, so it is also known as the discontinuous or intermittent type.

Generally, there are two major types of asphalt plants. The basic purpose of all these types is to produce hot mix asphalt. However, there are significant differences between these plants in the way they achieve the desired results and in their overall functioning.

How do asphalt batching plants work and what are their benefits

  • The aggregate is fed by a belt conveyor from the cold feeder to the rotary drying drum where the moisture is removed.
  • It is then extended to a set of screens where it is broken down into several component sizes and stored in a hot aggregate temporary storage compartment.
  • These aggregates are then correctly proportioned in a weighing hopper.
  • It is put in a pug mill and mixed for a certain time.
  • Liquid bitumen is introduced at the appropriate time and the combination is mixed for the required time.
  • The gate of the pug mill opens at the end of this cycle and the finished asphalt mixture is released directly into a waiting truck or special holding silo.

Benefits of asphalt batching plant

  • Batch Mix Plants manufacture very high-quality finished products due to the precise measurement of each batch produced.
  • The intermittent production process enables them to easily switch back and forth between different mixing specifications as and when required.
  • In batch plants, the pug mill uses arms, which have paddles attached, thus a forced or physical mixing of the components.
  • In most cases, they come with a baghouse dust collector. The dust generated during the whole process can be caught, Due to which the surrounding environment will not be so polluted.
Asphalt drum mix plant

Asphalt Drum Mix Plant is one such facility featured with a continuous paving material manufacturing process without gap breaks. It is more time-saving and efficient, so compared to its counterpart, low-cost equipment would be an ideal choice if the quality standard of the paving material is not too high.

Drum mix plants produce asphalt mix through a continuous process, so they often require the use of temporary storage silos in an attempt to avoid downtime due to the final mix not being disposed of in a timely manner.

Working process of asphalt drum mix plant
  • Flow meters and calibrated feed belts are used to measure liquid bitumen and cold aggregates, helping to ensure that they enter the dryer/mixer proportionately.
  • The cold aggregates are then passed to the dryer/mixer where the first half is devoted to removing the moisture.
  • The correct percentage of liquid bitumen is injected and the resulting material is thoroughly mixed in the other half of the drying drum.
  • The final asphalt mix is ​​released into a waiting truck or special holding silo.
Advantages of asphalt drum mix plant
  • By eliminating most of the steps taken by the asphalt/concrete batching plant to produce the mixture, the drum plant is able to do its job more economically as the rhythm of production is not broken into batches.
  • It is a continuous process that creates a homogeneous mixture that can be manufactured at a high rate.
  • Since there are no mixing towers or lifts, the system is significantly simplified, with a resultant reduction in maintenance costs. you can also get some benefits of hot drum mixing which are provided by the famous manufacturer in india. 

FAQ

  • How much does the asphalt plant cost?
  • What is the return on investment in the asphalt plant?
  • Batch mix and drum mix asphalt plant, which one to choose?
  • Where to buy a higher performance-to-price ratio asphalt plant?

 

 

May 19, 2022 09:19

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