What is tarmac (asphalt)?
Tarmac is a mixture of bitumen (a sticky petroleum product) and mineral aggregate (stone chippings) compacted into a durable road or driveway surface.
Tarmac, or asphalt, is a construction material made from bitumen bonded to stone chippings and sand. The bitumen acts as the glue that holds the aggregate particles together, creating a hard-wearing surface suitable for driveways, car parks, and roads. When laid properly, it forms a smooth, relatively quick-drying finish that can be trafficked within hours of installation.
The composition typically consists of around 90 percent aggregate (crushed rock and sand) and 10 percent bitumen by weight. This ratio can vary depending on the intended use and load-bearing requirements. The material is heated to high temperatures during manufacturing and application, allowing the bitumen to flow around the stone particles and set as it cools.
Tarmac differs from other popular hard surfaces in several ways. Unlike block paving, which uses individual pavers fitted together, tarmac is laid as a continuous layer. Resin-bound surfaces use epoxy or polyurethane resins instead of bitumen and offer a different aesthetic and permeability profile. Tarmac is generally more affordable and quicker to install than these alternatives, though it does require periodic maintenance such as sealcoating to extend its lifespan.
Homeowners and businesses in Cheltenham choosing a new surface should consult with driveway paving contractors to determine whether tarmac suits their specific needs, site conditions, and budget.