An asphalt mix is a combination of asphalt and aggregate that is used for paving roads, parking areas, and other surfaces. There are many different types of asphalt mixes, but all of them share some degree of flexibility. This property allows an asphalt mix to withstand the stress of traffic and weather conditions and also makes the surface less susceptible to cracking and potholes.
So what are the most flexible types of asphalt mixes? If you’re interested to know more, we invite you to continue reading as we’re going to discuss this topic in today’s entry.
Factors That Affect Flexibility
There are many factors that can affect the flexibility of an asphalt mix, including the type and size of aggregate used. In general, however, mixes that contain a high percentage of rubber or latex will be more flexible than those that don’t contain these ingredients. These materials make the asphalt more elastic, which gives it the ability to better resist surface stress.
On the other hand, asphalt mixes that don’t contain these additives are known as “rigid” mixes, and they are less resistant to cracking and potholing.
Type Of Flexible Asphalt Mixes
Although they differ in formulation in terms of the mixture, here are the most common flexible types of asphalt mixes used in the United States today:
Asphalt Concrete is a type of mix that is a composite material made of asphalt binder along with graded aggregates. And the aggregate particles used can range from coarse to fine quality. Asphalt concrete is also commonly known as Hot Mix Asphalt (HMA) which is produced in temperatures between 300 to 350 degrees Fahrenheit. This allows the mix to be more easily shaped and compacted into the desired form. It also provides good adhesion to the underlying pavement.
However, HMA can be more difficult to work with and can be susceptible to rutting and shoving. Also, this type of mix can be further classified according to its indented use based on the requirements of the paving project:
Type A – This HMA is classified as the dense type. This mix contains aggregates that are evenly distributed through various sieves. This is a specified mixture of HMA that is used in the base layer as well as the surface layer of the pavement. The term “Type A” came from the Standard Specifications of asphalt that pertains to the quality of aggregates used to produce this type of mix.
RHMA-G Type – This HMA is classified as gap graded and it refers to the Rubberized Hot Mix of asphalt that is gap-graded. It is classified as such because the mixture is composed of a very coarse aggregate and only a portion of aggregates at the middle part to provide space for the rubber-modified binder to combine well while allowing stone-on-stone contact to ensure rut resistance. The binder on the base is also modified using crumb rubber particles. With these ingredients included, it produces an asphalt mix which is more durable, resistant to traffic noise and cracks, increased skid resistance, and reduced overall lift thickness so the contractor will be able to apply the mix of more lane miles.
Open-Graded Friction Course – This HMA is classified as HMA-O, RHMA-O, or RHMA-O-HB. This type of mix contains a graded aggregate that is uniform in size to create a solution with air voids of about 18 to 22 percent. And because of the aggregate used, the mixture allows reduced water splashes, enhanced skid resistance during wet weather conditions, and an effective stormwater treatment.
Choosing The Right Flexible Mix
One of the most important factors in choosing an asphalt mix is the climate where it will be used. Hot climates require mixes that are more resistant to thermal cracking, or the splitting of material as a result of an applied temperature differential. This can be a result of many factors including the environment, traffic, and the construction of the pavement. And the most common type of thermal cracking is called “alligator cracking”. On the other hand, regions with colder climates need asphalt mixes that are better at resisting moisture damage.
Asphalt mixes can also be customized to meet the needs of a specific project. For example, some mixes are designed to be used in areas with high traffic, while others are meant for use on lighter-traffic surfaces.
How A Contractor Can Help You Choose The Right Asphalt Mix
When selecting an asphalt mix, it is important to consult with a qualified professional as they can help you choose the right mix for your project and climate. They can also provide guidance on how to properly install and maintain your new asphalt surface.
Working with a professional contractor like Luke’s Asphalt Paving and Sealcoating in San Antonio, TX is key in providing the right type of asphalt mix because they have years of experience and knowledge in working with asphalt and can help choose the best mix for your specific needs. They will also be able to customize the mixture of the asphalt if the situation calls for it.
The cost of getting the right mix of asphalt will vary depending on the contractor you use and the size of your project. However, you can be sure that the most flexible types of asphalt mixes will be able to withstand extreme changes in temperature. This is perfect for areas that experience a lot of freeze-thaw cycles. You’ll also find that these mixes are less likely to crack or chip under heavy traffic.
Final Thoughts
If you are working on a pavement project, reach out to a qualified contractor today to get started. They can help you choose the right asphalt mix for your project and ensure a successful outcome.
No matter what the specific project requirements may be, there is an asphalt mix that can suit them. The important thing is to choose the mix that best meets the needs of the climate and the surface on which it will be used. With so many options available, there is sure to be an asphalt mix that is perfect for any project.