Site excavation is done when damaged asphalt and sub base must be removed from the site. This process creates a smooth, uniform surface for the new pavement.
Rabine Paving recommends excavation if the parking lot has not been properly maintained and serious issues are identified. These issues include: faded appearance, cracks, fractures and potholes, puddling, crumbling, water drainage issues, water damage and vulnerable substrate.
Excavation on small sites can be done using picks, shovels and wheelbarrows. Larger scale excavation projects will require bulldozers and backhoes. Dirt, clay, and aggregate are site excavation material types.
- Topsoil Excavation – The exposed layer of earth’s surface, including plants or decomposing matter that could make soil compressible and unsuitable for structural load bearing, is removed. The depth varies from site to site, but it usually ranges from 150-300 mm.
- Earth Excavation – The soil layer under the topsoil is removed. The removed material is often stored and used for constructing foundations and embankments.
- Rock Excavation – Material that can’t be excavated without using specialized excavation methods such as drilling or blasting with explosives.
- Muck Excavation – Excessively wet material and soil that is unsuitable for stockpiling is removed.
- Unclassified Excavation – A combination of materials is removed as they are difficult to distinguish.