Hot-mix asphalt, or HMA, is a widely used material in road construction and pavement projects. It is the most common type of asphalt mix used for highways, parking lots, and various other applications where long-term durability is the main priority.
Today, we’ll learn all about HMA, its types, benefits, components, how it’s made, and how Simmons Construction & Paving Company Inc. can help you with your commercial asphalt paving needs.
What is HMA? Main Components of Hot-Mix Asphalt
Hot-mix asphalt is a blend of aggregates, asphalt binder, and additives designed to create a high-quality pavement surface, frequently used in commercial asphalt paving. The main components of HMA include:
- These are crushed stone, gravel, or sand that provide structure and strength to the mix.
- Asphalt binder. A petroleum-based substance that holds the aggregates together and provides flexibility and waterproofing.
- Various materials, such as polymers, anti-stripping agents, rejuvenators, etc., can be included to improve durability, flexibility, and resistance to environmental factors.
This combination of materials, in specific proportions, helps HMA perform well under traffic loads and varying climate conditions.
Benefits of Using Hot-Mix Asphalt
HMA offers several advantages, making it the preferred choice by any commercial construction company for road construction and paving projects:
- Hot-mix asphalt is known for its strength and ability to withstand heavy traffic loads, making it optimal for highways, driveways, parking lots, and similar projects.
- Cost-effectiveness. Compared to other paving materials, HMA offers a lower lifecycle cost due to its long lifespan and ease of maintenance.
- Weather resistance. HMA is designed to endure extreme weather conditions, from high summer temperatures to freezing winter conditions.
- Smooth surface. The smooth finish of HMA provides a comfortable ride for vehicles while reducing road noise and improving skid resistance.
- Reclaimed asphalt pavement can be recycled into new HMA mixes, making it an eco-friendly option for asphalt construction projects.
Types of Hot-Mix Asphalt: Different Mixes for Different Purposes
Different types of HMA are designed for specific applications based on traffic loads, climate conditions, structural requirements, and other key factors:
- Dense-graded mix. A well-balanced mix that is used for most road surfaces. It is quite versatile, providing durability and strength while being resistant to water damage.
- Open-graded mix. A porous mix designed to improve water drainage, reduce hydroplaning, and overall improve road safety. It is commonly used in high-rainfall areas.
- Stone matrix asphalt. This mix contains a higher percentage of coarse aggregates and a polymer-modified binder for increased durability and resistance to rutting. Abbreviated to SMA.
- Warm-mix asphalt. Produced at lower temperatures than traditional HMA. This mix reduces fuel consumption and emissions, making it a more sustainable choice.
Choosing the right mix depends on your project’s specific needs. A professional commercial asphalt paving company can help you determine the best option.
How is Hot-Mix Asphalt Produced?
The production of hot-mix asphalt follows a well-controlled process in order to maintain quality and consistency. While mix specifications and detailed processes are trade secrets of asphalt companies, the general procedure looks like this:
| Step | Description |
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High-quality aggregates are selected (depending on needs), washed, and heated to remove moisture. |
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The asphalt binder is heated to the required temperature for proper coating and adhesion to the aggregates. |
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Heated aggregates and asphalt binder are mixed in a plant to achieve consistent distribution. |
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The hot mix is transported to the construction site while maintaining its temperature and then applied using paving equipment. |
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Once applied, the asphalt is compacted with rollers to remove air voids and create a smooth, durable surface. |
This process requires expertise and precision, which is why choosing an experienced commercial asphalt paving contractor is crucial.
Maintenance and Lifespan Tips
Proper maintenance extends the lifespan of hot-mix Asphalt, helping it achieve long-term performance. As professionals in commercial asphalt paving in Charleston, SC, we know how to make that happen — follow these tips to make sure your projects remain functional and crack-free for a long time:
- Consider sealcoating. Applying a protective seal coat helps prevent oxidation, moisture damage, and surface wear.
- Seal cracks immediately after spotting. Sealing cracks early prevents water infiltration, which can cause further damage and potholes.
- Clean regularly. Keeping the surface free of debris, oil spills, and standing water can help preserve its integrity.
- Provide proper drainage. Adequate drainage prevents water accumulation that can weaken the pavement structure.
Paving the Right Way with Simmons Construction & Paving Company Inc.
For businesses looking for a reliable commercial asphalt paving company, Simmons Construction & Paving Company Inc. offers professional services specifically designed to meet your paving needs.
Why choose us? Our team has over 37 years of expertise in commercial asphalt paving in Charleston and surrounding areas. We use the best HMA mixes for durability and performance, along with state-of-the-art paving equipment for maximum precision.
As a trusted asphalt construction partner, we are committed to delivering high-quality paving solutions for commercial and industrial projects. Contact us today for a consultation and get the best asphalt paving services tailored to your business needs.