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blacktop-paving

What are the properties of Asphalt

When considering asphalt concrete mixtures, each mixture needs specific properties to meet recommended safety guidelines. Whether for blacktop paving or other construction projects, reach the required mix properties in stability, durability, flexibility, fatigue resistance, skid resistance, impermeability, and workability. Read the specifics below.

The Importance of Stability

Stable paving will remain smooth and not alter in shape regardless of loading and stress. This is essential for blacktop paving. A balance between internal friction and cohesion increases stability. This will help maintain shape under heavy traffic.

Maintaining Durability and Impermeability

Pavement withstands considerably stressed due to traffic, weather, and moisture. To maintain durability, use maximum binder content and a denser gradation of stripping resistant aggregate. This helps reduce the passage of moisture, water, and air through the pavement.

Workability and Flexibility Are Key

The more workable the mixture is, the easier it is to place and shape. Ensure stability to avoid issues with workability. If a mix is too easy to work, then the resultant mixture can be unstable. This “tender mix” might have too much moisture, not enough mineral filler, or too much sand. Flexibility determines if the pavement will resist cracking. All asphalt pavement needs flexibility to avoid cracking, potholes, and other damage. 

Fatigue Resistance

Constant heavy traffic leads to bending in the pavement. If the pavement has not been mixed properly or exhibits fatigue, cracking results. Aging and poor mixing contribute to poor fatigue resistance.

The Importance of Skid Resistance

For high traffic areas, skid resistance helps tired grip the surface and avoid slipping and skidding. Especially important in areas with high precipitation, skid resistance prevents accidents and injury. Avoid smooth surfaces. Rough surfaces have more skid resistance.

Follow all mix requirements to maintain these key desirable properties. If you have questions about paving, asphalt, and concrete, feel free to contact our experienced professionals today. We are ready to help you with your project.

Choosing the Right Type of Asphalt

Choosing the Right Type of Asphalt

So you’ve decided on asphalt for your next major project.  An excellent choice!  Asphalt is a great option for a large variety of projects, owing to its durability, its ease of repair and its cost-effectiveness.  But what type of asphalt is best for you?

Not all asphalt is made equally, and some types of asphalt are better for certain projects.  Depending on what you need out of your asphalt surface, you’ll need a different mix of asphalt.  Here’s a quick rundown of the most common types of asphalt around, and what benefits they provide.

Hot Mix Asphalt

Hot mix asphalt is ideal for driveways, thanks to its aesthetic appeal – it’s easy to give it a quality, finished appearance.  Its flexibility, weather resistance and ability to repel water make it a common choice throughout North America.  It’s called “hot mix” because it’s heated and poured at temperatures between 300 and 350 degrees Fahrenheit.  It’s durable, easy to repair, withstands freezing and thawing and is unaffected by salt in the winter.  It’s a high-quality, low-maintenance surface.

Warm Mix Asphalt

Warm mix, as you might guess, is poured at lower temperatures than hot mix – between 200 and 250 degrees.  This offers much of the same benefits of hot mix, and has its own benefits added in, as well.  It can be laid in cooler temperatures, extending the paving season – great if you need an emergency paving job in, say, December.  It’s also greener than hot mix, using less fossil fuels and resources in the manufacturing process.  It also produces less dust, smoke and fumes, which is better for worker safety.  For these reasons, and more, it’s becoming a very popular option.

Perpetual Pavement

Perpetual pavement is good for heavy-use areas; it’s a multi-level paving process that helps prevent the need for complete replacement.  A strong, flexible base helps prevent cracks from forming from the bottom up, while a strong middle layer is laid on top of that, before the final top layer is applied.  That middle layer is permanent – think of it like a buffer zone – while the top layer is designed to be replaced periodically.  That helps save time and money on repair needs – only the top layer needs to be addressed during regular repairs.  In high-traffic areas, where damage is unavoidable, perpetual pavement is a great option.

Porous Asphalt

Porous asphalt is a great option for parking lots and other areas with drainage issues.  Pores in the surface allow water to drain through the surface into the soil below, helping avoid pooling and puddles.  It reduces runoff, which is key in commercial areas, and is better for the environment, reducing storm system basins.  It’s often a little courser than regular asphalt, but it’s a great way to manage water on your property.