Asphalt and Paving
Leritz and Busy Bee specialize in asphalt paving, repair and maintenance in the St. Louis metropolitan area, and have extensive experience serving:
- Commercial Property Owners and Building Managers
- Contractors and Developers
- Industrial Facility Owners and Managers
- Institutions (Schools, Hospitals, Churches)
- Recreational Facilities
- Private Communities, Boards of Trustees
We understand that the needs and schedules of each of these markets is unique, so we tailor our process and solution to meet those needs and complete a paving job done right.
- Asphalt is the refined residue from the distillation of crude oil. This material is then mixed with crushed stone, sand or gravel (known as aggregate) to form the finished product we know as asphalt. In some cases, such as the Town & Country Crossings project, building material may be crushed and recycled for use as the base layer.
Types of Asphalt
- Perpetual Pavement
- Porous Pavement
- Quiet Pavement
- Warm-Mix Asphalt
The Lifespan of Asphalt
- While the lifespan of a structure depends on variables such as thickness and quality, asphalt pavements that are designed and constructed as Perpetual Pavements never need to be removed and replaced, they are permanent structures. The only maintenance needed is infrequent (every 20-25 years) replacement of the surface – and the material that is removed is recycled.
The Durability of Asphalt
- While asphalt is a hard material, it retains enough flexibility to accommodate natural variations in the roadway; this makes it a popular choice for roadway paving. It has also become increasingly popular for parking lots because of its ability to bear the weight of cars.
The Repairabilty of Asphalt
- Another benefit of asphalt over other materials is that it can be applied quickly to prepared surfaces. This makes repairs less of a headache as the work can be completed without blocking traffic or parking lots for long periods of time.
- Before the paving operation starts, an asphalt distributor is used to spray asphalt on the unpaved surface. This film of asphalt serves as the prime and tact coats. The coats are then allowed to cure before the actual paving resumes. These coats prevent any slippage between the surface and overlay during or after the compaction.
In order to be installed properly, the asphalt must arrive at the job hot – between 275 to 325 degrees Fahrenheit. The asphalt should be installed with a paving machine, which has a strike-off, called a screed, that smoothes and partially compacts the new surface. The paver is positioned properly onto the road and the screed of the paver is lowered onto block of the same depth of the loose asphalt mat that is going to be laid on the road. After that, the block can be removed and paving can start.
The most crucial aspect of any paving job is proper compaction of the asphalt. This is achieved by rolling the asphalt while it is still hot, with the proper sized rollers, before the asphalt cools to around 185 degrees. The roller size (weight) depends on the job and the thickness of the asphalt being installed.
- Porous pavements, used mostly for parking lots, allow water to drain through the pavement surface into a stone recharge bed and infiltrate into the soils below the pavement. Even after twenty years, porous pavements show little if any cracking or pothole problems. The surface wears well and retains its ability to handle rain water for many years.
- Asphalt covers 94% of America’s roads.
- According to the Environmental Protection Agency, asphalt pavement is America’s most recycled product, the asphalt industry recycles 80.3 million tons of its own product every year.
- Asphalt can reduce noise pollution; studies have shown that hot mix asphalt can reduce the sound produced at the tire-pavement interface.
- According to the Federal Aviation Administration between 80-95% of all runways at the nation’s 3, 364 commercial airports are surfaced with asphalt.
- 31 of the 35 NASCAR race tracks are paved with asphalt surfaces.