What Is Pavement?
Types, Materials & Uses Explained
To most people, "pavement" just means the hard surface they drive on. But in the world of engineering and construction, pavement is a carefully designed system.
At its core, pavement is any durable surface layer engineered to support traffic—whether that's a 6,000-lb SUV in your driveway or guests walking to your front door. It isn't just a "lid" for the dirt; it is a structural bridge designed to protect the soil underneath and provide a safe, smooth travel path.
The Three Main Types of Pavement
1. Flexible Pavement (Asphalt): Asphalt is the most common flexible pavement. It consists of multiple layers of gravel and an oil-based binder. It is designed to "flex" and bend under the weight of traffic. While it is cheaper to install, it relies heavily on the strength of the soil layers beneath it.
2. Rigid Pavement (Concrete): This is what we specialize in at Sudlow. Rigid pavement is made of reinforced concrete slabs. Unlike asphalt, concrete uses "slab action" to distribute weight. This means the concrete itself bears the brunt of the weight, protecting the subgrade and preventing the "ruts" and dips often seen in asphalt.
3. Interlocking Pavement (Pavers): This involves individual units (bricks, stones, or concrete blocks) set over a sand and gravel base. While beautiful, they require the most maintenance to keep the joints clean and the units level.
How Pavement "Distributes" Weight
Why can't you just drive on the grass? Because the pressure of a tire would collapse the soil.
In Flexible Pavement (Asphalt): The weight is transferred "grain-to-grain" down through the layers. If one spot of soil is weak, the asphalt will sink.
In Rigid Pavement (Concrete): The slab acts like a bridge. It spreads the weight of a car over a massive area, meaning the pressure on the soil is significantly reduced. This is why concrete is the superior choice for Atlanta's varying clay soils.
The "Albedo Effect" (Why Concrete Pavement is Cooler)
In a city like Atlanta, pavement plays a massive role in the temperature of your home.
Low Albedo (Asphalt): Dark surfaces absorb up to 90% of solar energy, turning your driveway into a "heat sink" that radiates heat into your garage and house all night.
High Albedo (Concrete): Light-colored concrete reflects sunlight. This is known as the Albedo Effect. Using concrete pavement can actually lower the "micro-climate" temperature around your home by 10-15°F during a Georgia summer.
Why Pavement Design Matters in Atlanta
Our local environment presents a "perfect storm" for pavement failure if it isn't designed correctly:
Expansive Clay: Georgia clay swells when wet. Pavement must be rigid enough to handle this movement.
Drainage: In the Southeast, water is the #1 enemy of pavement. If water gets under the slab, it can erode the base and cause "pumping" (where mud is forced up through cracks).
Heat Cycles: Our frequent 30-degree daily temperature swings mean pavement is constantly expanding and contracting.
Where You'll Find Professional Pavement
Residential: Driveways, patios, and sidewalks.
Commercial: Parking lots and loading docks.
Municipal: Roads and airport runways (which almost exclusively use rigid concrete pavement due to the extreme weight).
Sudlow Concrete specializes in rigid concrete pavement designed to last 30+ years. We don't just "pour and go"—we engineer every slab to handle the unique demands of the Atlanta landscape.
