What Is the Best Base For Asphalt?

Posted on: July 23, 2022

When paving a driveway, what is the best base for asphalt? It depends on the purpose of the driveway, whether it’s a residential driveway or a commercial one. You can opt for a Blacktop base, an Aggregate base, or a Porous asphalt base. You can find out more about these three different types of driveways in the following paragraphs. However, there are a few things you should always remember before deciding on the base material.


To install blacktop properly, the base must be at least 1 foot deep and have an even distribution of crushed gravel. This base is often a gravel drive, but if it isn’t, the contractor should order blacktop that contains small stones that are no more than 3/8 inch in size. A contractor can then install one-inch layers of blacktop over the gravel base. These small stones are then mixed with a mixture of medium and coarse sand to produce a smooth surface.

Crushed stone is another option for the base. This material is a mixture of angular pieces of rock, ranging from 1.5 inches in size to sand particles. Larger angular stones are necessary if heavy vehicles will be driving over the driveway. If the base is rounded, the stone will move when under pressure. Hence, the best base for blacktop is a crushed gravel layer. If the base material is properly prepared, it will last for a long time.

While blacktop is the top dressing, it doesn’t provide much strength in itself. In fact, it only hides the strength of the foundation below it. Before hiring a blacktop contractor, it is wise to ask them about the type of gravel base that they use. If it’s not gravel, you should definitely opt for another type of driveway material. This way, you’ll ensure the longevity of the driveway. It’s not that difficult to install a blacktop driveway. But it’s also time-consuming and costly.

Aggregate base

Aggregate base is a type of construction material that contains particles ranging in size from 20 mm down to dust. It is made of virgin rock or recycled concrete or asphalt. It is used as the base course for pavements, cement pads, and foundations. The ACB is often abbreviated as ABC. It is composed of a larger grade of aggregate and serves as the base for subsequent layers of aggregates.

Aggregate particles should be angular and nearly equidimensional. A thin, flat, elongated aggregate particle is more prone to segregation. Further, the elongated aggregate particles are prone to break down during compaction and may produce additional fines. Ultimately, the material should be durable. When constructing a new asphalt pavement, consider the type of aggregate you will use.

When installing asphalt pavements, it is crucial to properly prepare the aggregate sub base. Aggregate sub base must run off water and be compacted before laying the asphalt. If not, the asphalt will heave or crack. Properly compacted base prevents soft spots from forming and will make the asphalt last longer. The final surface course is then paved over the top. The paving of the final surface course can take half the time as the installation of untreated aggregate base material.

Porous asphalt driveways

A popular new driveway material is porous asphalt. This material is highly porous and allows water to percolate through it. This makes it an environmentally friendly alternative to old-fashioned concrete and asphalt driveways. If you live in a climate where water-logged driveways are common, consider installing porous asphalt for your home. Listed below are the benefits of porous asphalt. Read on to learn more. Weigh the benefits of porous asphalt and how it can benefit your home and environment.

Durable and green: While some driveway materials can be ripped up and replaced by a storm, porous asphalt can endure freezing temperatures. It can absorb water up to 65% of its frost depth. Because it doesn’t expand, water can trickle into the driveway, not damaging it. This means less chance of potholes and root invasion, and you’ll have an environmentally friendly driveway for years to come. It’s one of the best options for a driveway, so make sure you choose a company that values the environment.

As a bonus, porous asphalt offers environmental benefits as well as financial savings. It reduces the amount of storm water entering local sewers, reducing the burden on the storm sewer system. It can also reduce the costs associated with constructing a retention pond, which can make land available for other uses. You can even save money by reducing the size of the pond and reinvest that land into a profitable asset.