Pavement Milling: How Does Pavement Milling Work?

  • by
Road Recycler

Pavement Milling: How Does Pavement Milling Work?

Pavement milling is one of the most common services in the road contraction industry. Pavements are for use by vehicles and sometimes as human walkways. In fact, the term pavement can also be used to describe a road, sidewalks, street, or paved areas in the park. They are constructed using two main materials – concrete and asphalt.

After installing the first asphalt or concrete during the initial construction, the layer will start wearing off. This is cause could be usage and exposure to harsh natural forces such as rains, sun heat, and so on. That’s when pavement milling becomes necessary to repair the surface.

What is Pavement Milling?

Pavement milling or cold planing, is the process of removing part or most of the asphalt or concrete layer of a road. The aim of this removal is to repair worn out parts of the road or the paved surface. The depth of the paved surface being removed is determined by many factors depending on the extent of the damage.

Apart from the worn-out paved surfaces, there are many reasons why pavement milling may be necessary. One of them is the leveling of the pavement surface. Damaging of the paved surface, maybe by accident, could also warranty pavement milling.

How Pavement Milling Works

Paved surfaces are designed to be very tough to withstand tough environmental conditions. Therefore, when it comes to removing these surfaces, it is definitely some tough work. To mill pavements, you need heavy-duty pieces of equipment called road milling machines or cold planers.

Milling machines are designed with a rotating drum fitted with sharp cutting tools called milling teeth or milling bits. The drum is rotated by a motor, making the sharp bits to cut away the paved surface. The milling teeth are positioned so that the pavement they are cutting is loaded to the conveyor.

The conveyor then collects the milled asphalt or concrete and load it into the cartage trucks. The trucks will then transport the waste material to the recycling plant. This is where the concrete or asphalt is cleaned by removing all foreign particles, including the remaining binding materials. After that, the material will be ready for use in the construction of the same pavement.

It is important to note that milling pavements generate a lot of heat because of the friction between cutting bits or carbide cutters and the pavement surfaces. If this heat is not controlled, it can damage the cutter tools. That’s why cooling an essential aspect of pavement milling. In most cases, water is used for cooling the drum and bits while milling. That’s pavement milling works.

What is Micro Milling?

Micro mining is a term that is widely used in pavement milling. As the name suggests, micro mining is a type of concrete/ asphalt milling that uses unique drums with several times as many carbide cutters as the common milling machine drums.

The cutting bits are packed very close to each other to produce a smoother surface. The micro-milled surfaces are usually used as the final surfaces. However, sometimes, a thin overlay may be applied to improve the surface quality.

The technique can be used to solve the same issues as typical milling, but it can be a bit expensive. It may also require a more specialized operator to micro mill the pavement. One of its biggest setbacks is shallower depth compared to regular milling.

Common Uses Of Pavement Milling

The Milling of pavement has a vast range of uses in the road construction industry. One reason why road milling is recommended is to provide material for constructing the new paving. When the asphalt surface is milled, the asphalt or concrete material is recycled and used again as aggregate for the new pavement. This helps to reduce the cost of constructing new pavements.

Pavement milling is used on highways to fix uneven or bumpy parts of the road. The process can also be used to repair weak points on the road that are likely to develop potholes. The other common use of pavement is to make rumble strips on the road.

In conclusion, pavement milling is one of the surfaces common in paved with paved surfaces. It could be the road, walkways, or even a sports court. The most important thing is to get the right milling machine for every pavement milling.