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

Knowing A Bit About Concrete Plants

We are surrounded by lots of concrete structures like, buildings, bridges, houses, etc. These concrete structures are constructed using several varieties of concrete, which are prepared by Concrete Plants. A Concrete Plant combines various ingredients to form concrete. Concrete Plant is also known as a batch plant. Some of the ingredients used in a Concrete Plant are cement, sand, water, aggregate (rocks, gravel, etc.), additives, fly ash, potash, etc. A concrete plant is a complex machine comprising of different parts and accessories. Some of them are conveyors, radial stackers, aggregate bins, Cement Mixers, dust collectors, etc. The Mixer truck even though not part of the concrete plant plays an essential role in the whole process. in Out of all the parts mixer is very important. The Concrete Plants are of three types:

  • Ready Mix Plant:
    In a ready mix plant except for water, all ingredients are combined together. After mixing them properly, the mixture is cleared into a ready mix truck. During transport to the job site, water is added to the mix and mixed.
  • Central Mix Plant:
    In a central mix plant, including water, all the ingredients are combined together. After mixing them properly, the final product is transported to the destination. The central mix plants prepare much better and consistent product because all the ingredients are mixed in the mixer. It also has computer assistance, which ensures consistency in the product.
  • Mobile Concrete Batch Plant:
    This is the most recent concrete plant. It is designed for preparing all types of concrete, mixed cements, etc. The mobile concrete plants are engineered and designed in such a way that their multiple containers can separately transport all the elements or mixture necessary for the production of concrete, at the specific destination. This provides mobility to the operator to produce the desired product, at his desired place and in the desired quantity by using an on-board computer. This plant can be easily transported or can be fixed-mounted on a truck.

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Components & Operation Of Asphalt Plants

An Asphalt Plant is a combination of multiple mechanical and electronic units where a series of processes including drying, heating, blending, and mixing of aggregates with binder and other additives is carried out to form asphalt mixture. Asphalt Plants are available in several configurations. Broadly, they can be classified into two categories namely, Stationary Asphalt Plants and Portable Asphalt Plants. Asphalt Plants are also categorized as Batch Plants and Drum Mix Plants

  • Batch Mix Asphalt Plants
    In case of Batch Mix Plants, specific proportions of hot aggregates and binder are added to prepare one batch. After the process of blending, the asphalt mixture is discharged in one batch. This is not a continuous process.
  • Drum Mix Asphalt Plants
    In Drum Mix Asphalt Plants, blending of aggregates and binders takes place by means of a continuous process in a rotating drum.

Asphalt Plants: Components
An Asphalt Plant comprises of the following main units: Cold aggregate storage bins, vibrating screen, drying drum, filtration or pollution control system, asphalt load out conveyor , computerized metering and mixing system and in most cases a mixed material storage silo. A series of processes takes place in all these units to yield a uniform asphalt mixture.
Asphalt Plants: Operation
Irrespective of the type of Asphalt Plant used, the purpose is to prepare uniform asphalt mixture. The process of preparing asphalt mixture more or less remains the same in different types of Asphalt Plants. The process begins with cold aggregate feeding. Aggregates in different sizes (sizes depend on specific road requirements) are weighed and sampled to ensure uniformity and balance in the preparation. The process is followed by drying and heating of the aggregates, and immediately after the liquid asphalt is pumped to blend both materials. During the whole process, weight and proportion of aggregates, weight of asphalt content and mixing temperature are strictly monitored. After the mixing process is over, the asphaltic concrete is directed to load out conveyor set up with a  batcher  and eventually into the trucks, or in cases that asphalt storage silos are present the load out conveyor lifts the material to the Silo that is well above ground.

Based in Miami USA, DMI Asphalt Equipment LLC offers a wide range of Construction Machinery. The offerings of the company include Asphalt Plants, Concrete Plants, Crushing Equipment, Transport Tankers, Cement Mixers, Conveyors Stackers and many more. The company is among the leading Manufacturers, Exporters and Suppliers of Asphalt Laboratory Equipment. For more information, check its website at

Asphalt Plant And Its Fundamentals For Road Construction Industry

Asphalt mix consists of liquid asphalt cement and other aggregates and is used as a paving material. One of its most common uses is in the construction of roads.  Asphalt Plants are required for preparing asphalt mix through a series of processes including addition of aggregates in the right proportion, heating, blending and finally discharging for the end use.  Asphalts are available in several grades and specifications and can be either stationary or portable.
How Does Asphalt Plant Work?
Dry raw materials are fed into the cold aggregate silo. The conveyor belts deliver it to the drying drum. Different controlled heating methods are used to dry and heat the aggregates up to a specific temperature in the drying drum. The hot aggregate lifters then collect the hot aggregate and discharge it into the hot aggregate sieving machine. With the help of gravity collector and dust bag collector the hot aggregate lifters clean the smoke and release it into the atmosphere through an induced draft fan. The mixed asphaltic concrete then goes directly to the discharge buffer hopper from where it is settled into the material handling truck.
Advantages Of Using Asphalt Plant
There are numerous benefits of using Asphalt Plant in the road construction process. Some of them are:

  • There is a better control over the consistency of the asphalt mix.
  • Mixing time is significantly less when compared to manual mixing.
  • Asphalt Plants are electronically operated and require minimum manpower and labor.
  • Asphalt Plants come with advanced features such as preset programs for setting feed ratio and time thus there is a better control over the entire process.
  • Asphalt Plants are generally equipped with interlock protection device which helps in avoiding accidents.

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Concrete Crushing Equipment

Nowadays, cost-cutting has emerged as an apt weapon to attain success & to remain competitive, & this holds true of the construction industry too. Industrialists are eager to move ahead by using recycled concrete for different construction projects. They have understood the idea that by using the recycled concrete, they can considerably bring down the construction costs. Well, this is where the role of Concrete Crushing Equipment comes into play. The Concrete is first gathered from various destruction sites (sites which have undergone demolition) and then is put through Concrete Crushing Equipment.

Concrete Crushing Equipment: How It Works?
The concrete that can be put through the Concrete Crushing Equipment usually has to be uncontaminated. This simply means that it should be free of wood, paper, litter and likewise materials. Supporting rods made of iron or steel such as rebar can be put through Concrete Crushing Equipment because they can be detached with the help of magnets and other sorting mechanism without needing many efforts. After the used concrete or concrete debris is put through the Concrete Crushing Equipment, the mixture is sorted on the basis the size of the chunks. The large chunks are again sent through the Concrete Crushing Equipment so that they can be crushed more finely. After the process of crushing is completed and the crushed concrete is kept aside, the remaining particles are finally sieved out through a number of processes that include hand-picking as well as water flotation.

Portable Crushing Machine:
Crushing the concrete at the main construction location using Portable Crushing Machine lessens construction costs to a great extent. Level of pollution caused by a Portable Crushing Machine is lesser as compared to that emitted due to shifting material to and from a mine. Furthermore, large Portable Crushing Machine can crush the concrete almost up to 600 tons per hour and even more depending on the efficiency level. The Portable Crushing Machine usually consists of side ejection conveyor, a rubble crusher, display plant, and a conveyor to recycle the oversize concrete chunks.

Other types of Concrete Crushing Equipment:
Among the Stationary &  Portable Crushing Machines, there are Impact Crushers, Jaw Crushers, Cone Crushers, Vertical and Horizontal Impactors and several other types of Concrete Crushing Equipment, which are compact and autonomous. These Concrete Crushing Machines are efficient enough to crush up to 150 tons of concrete per hour.

To Buy Portable & Stationary Crushing Equipment  or any other type of Concrete Crushing Equipment, buyers can contact DMI Asphalt Equipment LLC. Functioning since 1987, the company has firmly established itself as a reliable Concrete Crushing Equipment Supplier in Miami. For further information please visit

Information About Cement Mixers

Earlier cement, which is one of the commonly used construction materials, was mixed by hand and the process undeniably used to consume a lot of time and efforts as well. But thanks to latest technology, construction industry witnessed the advent of Cement Mixers that have considerably simplified the task of mixing cement.

Cement Mixers: Types And Components
Basically, there are two types of Cement Mixers. The first type is relatively small and can be used at home, whereas the second type of Cement Mixer is typically a truck that distributes the previously mixed cement to different construction sites. By and large, all the modern-day Cement Mixers have built-in drums wherein the cement is finely mixed. There is a drive unit that ensures the continuous rotation of the mixing drum or barrel. Then there is a loading shaft (also known as chute) positioned at the top of the mixing drum. The ingredients that have to be mixed are channeled into the moving drum through the shaft. Besides, there is a long trough which can be used to adjust the angle that is generally maintained by the position of the drum. The mixing drum  houses paddles that allows the aggregate, cement and water to mix thoroughly .

Functioning Of Cement Mixers
The mixing drum of the Cement Mixer contains blades that are usually placed at a slant to the axis, positioned at the middle of the drum. These blades move towards the direction of longitude. The aggregates are poured in through the upper shaft and the drum is set to start revolving. The main engine is run by a hydraulic gear and helps in rotating the drum. Once the mixing drum starts revolving, water in specific ratio is added to the cement mix. The mixture then keeps on revolving till the time it is finally stopped.

Process Of Pouring The Mixture In Cement Mixers
For getting the cement mixture out of the mixing drum, the rotary motion is upturned. The slant of the blades drives the cement in the direction of the opening of the barrel or drum. The cement is thus poured out of the barrel on top of the chute or shaft. The chute then can be shoved towards the projected site for further usage.

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