Asphalt is the most widely used material for roads and pavement. On the following we mention nine different types of asphalt, and a quick explanation about each of them.
What is Asphalt?
Asphalt is a black, sticky liquid that is mixed with gravel, crushed rock, sand, and slag. A binder is used to make a cohesive mixture. This is the most widely used material for roads and pavement.
Asphalt offers a variety of benefits:
- Low maintenance
9 Different Types of Asphalt
There are 9 different types of asphalt below:
- Coarse graded asphalt
- Hot mix asphalt
- Cold mix asphalt
- Warm mix asphalt
- MC cold mix
- Porous asphalt
- Top layer asphalt
- Milled asphalt
There are various varieties of asphalt, each with its own set of pros and cons.
Coarse Graded Asphalt
Coarse graded asphalt is rough and provides support for a smaller mix. It is commonly used on highways for surface lifts, parking lots, and driveways. These mixes are frequently referred to as “base layers” or “binder mixtures.”
- Improves skid resistance,
- Minimizes spray,
- Lowers the chance of hydroplaning
Due to the lack of bonding amongst fine particles, it produces high porosity but does not provide the same durability.
Hot Mix Asphalt
Hot mix asphalt is used to repair or resurface roads, parking lots, driveways, and other paved surfaces. Under high temperatures, this is the easiest to work with. It provides a long-term solution for asphalt pavement problems, but it must be applied right away. It becomes more difficult to work with as it cools. It’s like a rock after totally cooled.
- Can endure floods, wind, and other elements
- Can tolerate weather conditions
- Frequently utilized for high-traffic roadways or driveways
It is slightly more costly than other asphalt mixtures.
The temperature outside must be between 50° and 90° F.
Cold Mix Asphalt
Cold mix asphalt retains its softness at cooler temperatures and resists water regardless of temperature. This asphalt mixture is frequently used to fill potholes. Because cold mix asphalt is softer, its predicted lifespan is substantially shorter. As a result, it should only be used as a last option or as a temporary repair.
- Can be installed in cold weather
- Waterproof at any temperature
Should only be used as a last option, such as filling potholes or cracks during the winter.
Warm Mix Asphalt
Warm mix asphalt is made in the same way as hot mix asphalt, but at a lower temperature of 50°F to 100°F. The fundamental advantage of hot mix is that it requires less compacting effort and hence emits less CO2. Warm mix seems to be more expensive, but it is the ideal alternative for people seeking a “green” solution.
- Lowering the mixing temperature conserves resources and energy.
- Improves working conditions
- Because it dries fast, the road may be reopened to traffic practically immediately.
- It does not cause building tools to wear out.
Finding the correct balance is difficult and moisture damage is common.
MC Cold Mix Asphalt
MC cold mix asphalt is a type of temporary asphalt used for patching. It repairs slowly and is typically utilized in regions that require a temporary patch. It will last the longest in places with little to no traffic. This asphalt mixture can be stored for future use.
Because the flashpoint is greater than that of typical medium-cured asphalt, aggregate does not need to be cooled as much when traditional stockpiles are formed.
Slow to cure and only ideal for small regions with light traffic
Porous asphalt has tiny holes in it that allow the water to flow through the pavement to the ground underneath. This enhances surface water maintenance. This asphalt is commonly used in parking lots to allow water to drain.
- Increases skid resistance and improves storm water management
- Produced with less energy
- Reduces odor, smoke, and pollutants.
Not suitable for high-traffic areas; usually used for pathways, patios, and driveways.
Not suitable for high-traffic commercial surfaces.
Top Asphalt Layer
Top layer asphalt is the most commonly used mix. It is applied once at temperatures ranging from 300°F to 350°F. The final layer is visually appealing because of the little stone feature that, when smoothed out, produces the appearance of a compact surface.
- Reduces noise pollution
- Visually appealing
- A comfortable ride
Typically requires more maintenance
Milled asphalt is produced by rejuvenating an asphalt surface. The top layer of asphalt is ground into fresh asphalt during this procedure. This asphalt is frequently used in instead of hot asphalt and stone gravel. It is less expensive and can tolerate harsher weather than other elements.
- Reduces aggregate demand
- Enables percolation
- Environmentally friendly
Quality varies, but it is not as nice as fresh asphalt and also the color is not as deep as that of regular new asphalt.
UPM asphalt is effective in all weather conditions. It is a long-term solution to any asphalt pavement issue. It is used to repair wet or dry potholes, so repairs may be done on your surfaces regardless of the weather. UPM is ready to use once compressed. It is intended to solve huge problems and may be utilized without the requirement of specific equipment.
- Simple to use
- It works effectively in all weather situations.
- Can be utilized regardless of the temperature
Only suitable for repairs and not appropriate for high-traffic areas.