Why is it important to choose a specialist contractor?

First stage: visit, mapping and initial feasibility

Every successful project at Pemankari Derakhshandepour starts with a detailed planning. Before any action, our engineering team arrives at the site and checks the existing situation.

Investigation of topography and drainage

Water is the main enemy of asphalt. Even the best asphalt in the world will not last if the slope and surface water disposal paths are not designed properly. Using advanced mapping cameras, the experts of Pemankari Derakhshandepour analyze the longitudinal and transverse slopes of the land to make sure that the rainwater quickly leaves the surface of the asphalt.

Accurate estimation of materials and costs

Financial transparency is one of the ethical principles of Darakhshandepour contracting. After the visit, the exact volume of excavation, the amount of foundation materials and the tonnage of asphalt required are calculated and notified to the client so that no unforeseen costs are incurred during the project.

Second stage: substrate preparation and soil operations (Sub-grade)

The final quality of asphalt is a full-view mirror of its infrastructure. If the soil base is weak, the asphalt will settle and blacken. Pemankari Derakhsandeh Pour spends a lot of attention at this stage.

Cleaning and excavating

First, all vegetation, tree roots, and vegetable soils that are not compactable are removed by Darakhsandeh Pour contracting machines (such as graders and loaders). This step is critical because the presence of organic matter under the asphalt causes decay and creates holes in the future.

Substrate soil stabilization

If the soil in the area is loose, the engineers of Pemankari Darakhsandeh Pour stabilize the soil with lime or cement or replace the unsuitable soil with new earthworks. The substrate is then compacted by heavy rollers to achieve standard compaction (usually above 95%). The soil laboratory in cooperation with Darakhsandeh Pour contractor confirms the amount of compaction.

Third step: Implementation of the base and subbase layers (Subbase and Base)

In order for the pressure from car tires to be properly transferred to the ground and not to break the asphalt, we need dense stone layers. Pamankari Derakhsandeh Pour uses the best broken mountain materials in this section.

Playing and pounding the sub-base

The first layer that is placed on the bed soil is called sub-base. Darakhsandeh Pour Contracting uses sand with specific grain size. This layer is usually 15 to 20 cm thick and plays the role of drain and pressure regulator. The graders of Darakhsandeh Pour Contracting regulate (level) these materials with millimeter precision.

Implementation of the base layer

On the sub-base, the base layer is placed, which is the main skeleton of the road. The materials of this layer should have more fracture and less soil. After spreading this layer, the executive team of Pemankari Derakhshandepour maximizes the compaction by precise watering (to achieve optimal moisture) and using heavy vibration rollers. The final surface must be completely rigid and motionless, so that the effect of the machine wheels Poor Radhanshadhan Contracting does not remain on it.

Fourth step: Prime Coat & Tack Coat

For gluing stone layers to asphalt or gluing asphalt layers to each other, bitumen is needed. This step is done in Darakhsandeh Pour Contracting with calibrated bitumen machines.

Prime Coat

This layer of soluble bitumen (usually MC250) is sprayed directly onto the sand base layer. The purpose of Darakhsandeh Pour Primecoat is to penetrate bitumen in the joints of stone materials, waterproof the substrate and create adhesion for the next asphalt layer. The skilled operators of Darakhsandeh Pour Contracting make sure that the entire surface is uniformly covered and avoid the accumulation of bitumen (which causes tarnishing of the asphalt).

Tack Coat

If asphalt is to be applied on old asphalt or on concrete, or between two layers of asphalt (binder and topka), single coat is used. Darakhsandeh Pour Contracting uses quick-breaking emulsion bitumen or soluble bitumen with the right concentration so that the two layers are completely welded together and the top layer does not shrink due to vehicle braking.

Fifth step: production and transportation of hot asphalt

One of the strengths of Darakhsandeh Pour contracting is cooperation with the best asphalt factories and supervision of the production process.

Mix Design

Each project has its own version. Parking asphalt is different from transit road asphalt. The engineers of Pemankari Derakhshandepour determine the appropriate mixing plan (bitumen amount, type of granulation and filler). The asphalt temperature in the factory should be around 160 degrees Celsius.

Standard shipping

Asphalt must reach the project site hot. Asphalt transport trucks contracted by Darakhsandeh Pour Contracting are equipped with tarpaulin tents in order to maintain the heat of the asphalt along the way and to prevent the cooling of the top layer. If the temperature is lower than the standard (usually below 120 degrees), the Darakhsandeh Pour will not allow it to spread because its compressibility is lost.

The sixth stage: Mechanized spreading of asphalt (Paver Operations)

At this stage, art and technology meet. Darakhsandeh Pour Contracting creates a uniform surface by using modern paver machines.

Finisher settings

The finisher device has height and level adjustment sensors. Expert operators of Darakhsandeh Pour Contracting control the exact thickness of the asphalt by adjusting the screed of the machine. The transverse slope of the road is also applied by the device at this stage.

Manual play in limited areas

In the corners, next to the tables and places where it is not possible to enter the paver, the skilled work team of Darakhsandeh Pour works with manual tools and at a high speed (before the asphalt cools down) to spread and level. The uniformity of the surface texture in manual and machine work shows the skill of the Darakhsandeh Pour contracting team.

Type of asphalt (Binder and Topka)

Usually asphalt is implemented in two layers:

1. Binder: Underlayer with coarser grain to withstand traffic load.
2. Topka: Final layer with finer grain to create a smooth and wear-resistant surface.

Pour Shining Contracting implements both layers with calculated thicknesses.

The seventh step: final compaction

The most important step to guarantee the durability of asphalt is its correct compaction. Pamankari Derakhsandeh Pour uses an engineered rolling arrangement.

Breakdown Rolling

Immediately after the asphalt is spread by the paver, iron wheel rollers (static or light vibration) come into action. Operators of Darakhshandeh Pour Contracting know that this step should be done when the asphalt is still very hot to form the initial compaction.

Intermediate Rolling

Then the rubber wheel rollers (pneumatic) are imported. The heavy weight and tiny movements of the tires cause the aggregate particles to lock together and make the asphalt texture impermeable. Pemankari Derakhsandeh Pour places special emphasis on this stage because it plays the main role in asphalt sealing.

Finish Rolling

Finally, tandem iron wheel rollers are used to erase the wheel marks of the previous rollers and create a completely smooth and polished surface. The result of Darakhsandeh Pour's work is a velvety, uniform and beautiful surface.

Quality control (QC) in Darakhshandepur contracting projects

The commitment of Darakhsandeh Pour contracting does not end with the completion of rolling. Our quality control team checks all parameters:

• Temperature control: in all stages of spreading and beating.
• Core Sampling: After the work is finished, samples of asphalt are taken to check the thickness and density percentage in the laboratory. Only if the results are in accordance with the strict standards of Darakhsandeh Pour Contracting, the project will be delivered.
• Smoothness test: Checking the surface to make sure there are no waves and sinkholes.

Why are the execution techniques of Derakhshandepour different?

You may ask what makes Darakhsandeh Pour Contracting different from other competitors? The difference is in the details.

1. Executive joint management: One of the weak points of asphalt is the junction of new and old strip. Darakhsandeh Pour Contracting by smooth cutting the edges of the previous work and heating the joints, creates a seamless joint that will never open.
2. Attention to weather conditions: Darakhsandeh Pour Contracting Never start asphalting in rainy weather or ambient temperature below 5 degrees Celsius (which causes the asphalt to cool down quickly and lack compaction). It doesn't.
3. Special machinery: Ownership of heavy and semi-heavy machinery by Darakhshande Pour Contracting allows it to carry out the work without depending on lessors, in a precise schedule and with healthy equipment.

After-implementation services and contractor warranty of Derakhshandepour

We believe in the quality of our work. All the asphalt projects implemented by Pemankari Derakhshandepour have a written guarantee of good work. This means that if during the warranty period, the asphalt suffers from performance problems, our team will be committed to repairing it free of charge. This level of commitment shows the assurance of Pemankari Derakhshandepour to strictly comply with all the steps mentioned above.

Asphalting applications by Derakhshandepour contractor

Our expertise is not limited to city streets. Pemankari Derakhshandepour is ready to implement various projects with specific standards for each user:

• Asphalt for streets and highways: withstanding heavy traffic.
• Asphalt for residential and commercial complexes: with high elegance and beauty.
• Asphalt for parking lots and floors: with precise gradient.
• Asphalt for garden and villa roads: resistant to the elements Natural.
• Asphalt floor of industrial sheds: resistant to forklift point loads.

Final word: Investing in quality

Poor-quality asphalt may seem cheaper at first, but its constant maintenance and staining costs will eat into your budget. Basic implementation of asphalt is a smart investment. Darakhsandeh Pour Contracting by strictly following seven key steps, including infrastructure, substrate, bitumen, production, transportation, spreading and compaction, will produce a result beyond your expectations.

We at Pemankari Derakhshandepour are not only your contractor, but also your caring consultant in all stages of the project. Our goal is to create a smooth path for your progress and comfort.

The way of communication with Darakhshandepour contractor

If you are looking for an expert, committed and equipped team for your project, contact us today. Pemankari Derakhshandepour experts are ready to provide free consultation and visit your project site to provide you with an accurate and technical estimate. Let the experience and expertise of Pemankari Derakhshandepour make the ground under your feet strong and smooth.

Darakhsandeh Pour Contracting; A symbol of strength and quality in the asphalt industry.