By admin Asphalt Paving • • • 0 Comments

Asphalt Milling VS. Asphalt Resurfacing

Asphalt is the general term used to describe the material that makes up the majority of roads around the world.

It is a mixture of various sizes of rock and oil as a binder. The process of developing an asphalt mix and laying it down to form a road is complex. However, without this process, roads that have been damaged over years of use would not be replaced or upgraded with new asphalt. There are a number of steps to replacing or upgrading an asphalt road, and while it is very rare for a road to be completely removed down to the dirt and repaved, the process of asphalt resurfacing is an important task for any asphalt company.

Asphalt resurfacing is the term used to describe the process of removing a portion of a road, usually no more than an inch or two, and then laying down new asphalt. This is something that needs to be done periodically, especially as new mixes of asphalt are developed to better withstand damage. The process of resurfacing a road can be broken down into just a few steps. However, sometimes the processes involved in a resurfacing project may be confused with one another. Understanding the differences among these individual steps, and their importance to the entire process, will enable you to better grasp what is going on during the resurfacing of an asphalt road.

The first step of the process is asphalt milling.

You may have seen milling machines working on a road. They are used to remove old asphalt, which is ground up and may be recycled. The milling process provides an asphalt company with something like a “blank canvas” to go back and repave with new asphalt. Milling can take place along a long stretch of a road, or in just a small area that needs to be repaired. Either way, the process takes off old and damaged asphalt, providing room for laying new asphalt without raising the height of the road.

After the milling process comes the process of asphalt resurfacing itself.

This is when the new pavement is laid down on top of the milled surface. The new mix is poured and rolled out to form a new surface to drive on. This process will involve a number of pieces of paving equipment, each of which plays an important role in ensuring that the new asphalt road meets the necessary standards.

As you can see, while the entire process may be referred to as asphalt resurfacing, the actual resurfacing is just one aspect of the process. It is important that the old asphalt be removed in order to provide a good place to start laying a new layer of asphalt. By using a milling machine to scrape off the top inch or two of asphalt, the new pavement can be laid without raising the level of the road. After the surface is prepared, the new asphalt can be laid. Sometimes, the laying of the new asphalt is what is referred to as the asphalt resurfacing process.

Understanding the difference between removing the asphalt, milling, and laying new asphalt, resurfacing, is important for knowing what is going on throughout the process of a paving project. And while some of the terms may be interchanged, these two processes are separate but key parts of repairing an asphalt road.

By admin Asphalt Paving • • 0 Comments

The Importance of Grading & Excavating Asphalt

It is always important to be prepared to learn something new, and when matters related to asphalt installation are concerned, there are a few things that many asphalt contractors, commercial property owners, homeowners, asphalt companies and even municipality employees may need to learn.

This article will give an easy and clear step-by-step overview of what a good quality asphalt installation requires.

Step 1: Demolition and Removal

The first thing you need to do is remove the existing surface, whether it’s concrete, asphalt or pavers.

  • For the required efficiency, demolition is done using heavy machinery that includes forklifts, front loaders, bobcats and large dump trucks when necessary.
  • The debris is then removed to make the place fresh for a new immaculate installation.

Step 2: Grading and Sloping

Technology plays an integral role in helping you get the perfect surface for the most appropriate water drainage.

  • Using automatic motor graders and laser-guided transits, ensure that you grade the surface you want paved to see to it that water will run off properly without creating unnecessary swamps.
  • When you get good water drainage for your asphalt, you will prevent future damage that includes cracks, water potholes and heaving. It will also add a lot of aesthetic appeal to your space.

Step 3: Prepare the Sub Base

The most integral part of your asphalt surface is the sub-base for the following reasons:

  • It provides a stable environment for maximum support of the new pavement.
  • It is a frost barrier and plays an integral role in reducing water damage because of thawing and freezing during winter.
  • The base stability, thickness, and compaction are very important steps when installing. If one thing goes wrong and the base is not properly compacted, the asphalt surface will not produce maximum durability.

Step 4: Undercutting, Sub Base Repair and Proof Roll

When the sub is well compacted and graded, you need to provide the next step, called the proof roll, to ensure that the underlying surface base is strong enough and ready to offer solid support to the new asphalt.

  • You can drive a heavily loaded quad axle dump truck row by row over the whole surface for the best results.
  • If the gravel happens to flex more than an inch under the truck’s weight, it means the base is not so well supported.

Step 5: Binder and Surface Course

Once you lay the sub, identify any soft areas and repair them, you can add the binder.

  • The binder is a large aggregate usually mixed with oil and, therefore, very durable and strong.
  • The binder layer is the ultimate strength of any asphalt surface.

Step 6: Install New Asphalt Surface

When you lay all the supportive structures of your new asphalt surface, you can add the top asphalt layer.

  • Surface asphalt is usually made of sand, oil and small aggregate.
  • The material combination provides a smooth and shiny surface when applied properly.

Step 7: Butt Transition and Joints

It is unusual to install an asphalt surface that does not connect to parking lots, existing driveways and busy parking lots. It is, therefore, important to do the following:

  • Give maximum attention to the butt joints and ensure that old asphalt and new asphalt are compacted.
  • Ensure that the area has proper water-run off.

Final Roll

Once the asphalt and the butt joints have been well laid, you can go ahead and make sure that the entire surface is compacted and smoothened by using a roller truck. This process ensures no small bumps and stones left poking through the new surface.