Asphalt Plant And Its Working

An Asphalt Plant is a machine designed to produce hot-mixed asphalt which is used in Road Paving in the whole Road Making Process. Asphalt is a vital material used in nearly every type of highway construction and maintenance. There are two types of Asphalt Plant- Batch Plant and Drum Mix Plant. Temperature and transportation highly affects the process of manufacturing asphalt for roads. Given is a list of all components of an Asphalt Plant along with their roles in the entire process of Asphalt Production.

Cold Aggregate Silo
In the initial stage, Dry Aggregates are fed in to the Cold Aggregate silo, and these Cold Aggregate silo are connected to Drying Drum with a conveyor belt. Also known as Aggregate bins or cold feed bins . Small plants can use only one bin but larger plants can use 4 or even 5 bins. Depending on the type of asphalt required on each contract the plant operator will need 3,4 or more different sizes of aggregates and each aggregate needs to be in the exact proportion on the final product. That is why each bin should be fit with a variable speed feeder that is controlled by the computer of the plant and delivers the exact amount of material from each bin for an exact mix as per job specifications.

Drying Drum
In the Drying Drum, the aggregates are dried by direct fire burner up to a specific temperature. Depending on the moisture present on the aggregates the plant will need more time for drying the material and this will reduce the output of the plant .  The Drying Drum rotates the aggregates several times and the dust generated needs to be controlled to avoid pollution . Some plants that mix on the same drum will use the last third of the length to inject the liquid asphalt to produce the final mix .

Metering and Mixing System
The aggregates have to be at the right proportions for the  mixing process, same as the liquid asphalt. This critical balance of the asphalt components is controlled by a precise computer system that controls each of the proportions for every size of aggregate and liquid asphalt involved in the mix.

Dust Cleaning System
Usually the pollution control system involves a dust gravity collector, bag house or wet scrubber.
Basically there is a dry pollution control system and a wet pollution control system, both are very effective and plant owners select one or the other depending many factors among them local government regulations .

Filler System
The fines collected by the dust bag collector can be sent to the recovery filler feeding system for storage and later use on the mix. The fines are transported with the help of a Conveyer belt.

Load out Conveyor or Drag Slat
Lifts  the finished asphalt mix onto the trucks or up to a Storage Silo. The ideal conveyor is closed one made out of steel to protect the mix from the environment and avoid loosing temperature during the loading of the trucks .

Scale or Weighting System
After the mixing, materials is sent to material handling dumping truck there needs to be a control of total amount of material leaving the plant site on the trucks. For that there are two main components to control amount of production . One is the same computer on modern plants it can produce a good report of material produced by the plant per hour or day  , and for individual trucks loaded with asphalt mix the best way have control is with scale. Usually the truck coming into the facility is weighted empty and then after loading the asphalt mix into the dump it is weighted again so there is an exact read out of the actual tones of materials delivered.

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Concrete Crushing Equipment – An Introduction

With the large scale infrastructural development happening all around, different hi-tech machine and equipment are being used in the construction industry to get the work done faster & more efficiently. There are many kind of construction equipment available in the market, all of which were built with a single purpose in mind i.e. to reduce human efforts. One such equipment that is widely used in the construction industry is the Concrete Crushing Equipment.

Use Of Concrete Crushing Equipment
The Concrete Crushing Equipment is designed to be used for a variety of applications ranging from demolishing concrete buildings & structures. These Concrete Crushers are also used for cutting through reinforced concrete bars.

Types of Concrete Crushing Equipment
Depending upon the kind of crushing application, there is a wide variety of Concrete Crushing Equipment available in the market. The Concrete Crushing Equipment can be categorized into – Jaw Crushers & Cone Crushers.

  • Cone Crushers: As one can make out from the name itself, the basic shape of such a crusher is conical. The materials are fed into the crusher from the wider opening at the top & the crushed materials are ultimately filtered out through the narrow opening towards the bottom. Cone Crushers are considered quite a good investment as they ensure low operation costs & increased productivity.
  • Jaw Crushers - In a Jaw Crusher, the concrete is crushed between two powerful jaws & the crushed material filters out through the closed Jaws of this equipment. The jaws are capable of opening and closing just like the scissors’ ends. The advantage of using the Jaw crushers are the lesser expenditures related to the maintenance of the equipment. Another benefit quoted by experts includes versatility of the Jaw crushers in processing a variety of abrasive materials.

A family business based in Miami U.S, DMI Asphalt Equipment LLC is among the reputed Concrete Crushing Equipment Manufacturers here. The extensive product line of the company includes – Asphalt Plants, Concrete Plants, Tanks (Transport Tanker, Asphalt Distributor, PMAC 10K), Crushing Equipment (Sand Screws), & other equipment (Conveyor Kits, Conveyors Stackers, etc. The company stocks some of the best models of Portable Crushing Machines & has earned appreciation for dealing in eco-friendly asphalt plants. The company has a widespread client network which extends across 30 countries. Apart from its base in Miami USA, the company also has branches in Colombia & Mexico. Visit to know more.

Asphalt Drum Mix Plant- Overview

The Asphalt Plant, which plays an integral role in the construction sector, can be categorized in to two main types – the Batch Plant & the Asphalt Drum Mix Plant. Apart from this basic difference, the Asphalt Plants can also be classified on the basis of their installation (portable or stationery), on the basis of flow (parallel-flow or counter flow Asphalt drum plants), etc.

Asphalt Drum Mix Plant Vs Batch Mix Plant
Though the function of both types of Asphalt Plant is the same (i.e. to produce asphalt mix of the right consistency as per the specific needs of the project), the difference lies in the continuity of mixing operations.  As opposed to the batch-type mixing plant, in a Asphalt Drum Mix Plant the aggregate along with other materials is mixed with the binder on a continuous basis.

Operating An Asphalt Drum Mix Plant – Safety Precautions To Follow

  • Dust is a major health hazard & the mixing operations in the Asphalt Drum Mix Plant usually generate a large amount of dust. To protect the workers from respiratory conditions, the plant should be fitted with a suitable dust collection system. Such dust collection systems would prevent the dust generated during the operations from being released into the environment.
  • Noise Pollution is another health hazard. Operators working in an Asphalt Drum Mix Plant are prone to hearing impairment.
  • Operators should be instructed to wear proper clothing gear before approaching the plant. Loose clothing may get caught in the pulleys (or belts, etc.) and can cause injury.
  • Any loose materials like wires, or hoses, etc. should be cleared out from the vicinity of the Asphalt Drum Mix Plant as they may cause accidents. Smoking should be strictly prohibited in the premises.

A family business established in 1987, DMI Asphalt Equipment LLC, is today a leading Asphalt Plant Manufacturer &  Distributor . The company is headquartered in Miami USA & has branches in Colombia & Mexico. The company specializes in providing Asphalt Plants, Concrete Plants, Tanks (Transport Tanker, Asphalt Distributor, PMAC 10K), Crushing Equipment (Sand Screws), & other equipment (Conveyor Kits, Conveyors Stackers, etc.).  DMI Asphalt Equipment LLC owns a 38,000 square ft yard area, close to the Miami International Airport, where it stocks Asphalt Plants, Concrete Plants and Crushing Equipment. Till date, the company has exported its high quality equipment to clients in over 30 countries. To know more, visit